CN217595937U

CN217595937U - Combustion engine rotating ring indexing positioning fixture

Info

Publication number: CN217595937U
Application number: CN202123119177.8U
Authority: CN
Inventors: 姜嘉平; 王继鑫; 唐雷
Original assignee: Csic Longjiang Gh Turbine Co ltd
Current assignee: Csic Longjiang Gh Turbine Co ltd
Priority date: 2021-12-13
Filing date: 2021-12-13
Publication date: 2022-10-18
Anticipated expiration: 2031-12-13

Abstract

The utility model belongs to the technical field of precision machine makes, concretely relates to combustion engine rotating ring graduation positioning fixture. The utility model comprises a wedging self-centering chuck mechanism, a rotating mandrel bottom plate mechanism and a spring pin seat mechanism, wherein the small end face of a movable ring workpiece is attached and placed on the self-centering chuck, a thin nut is screwed downwards, a locking block can descend under extrusion, the wedge surface of the locking block promotes the fixture block to be subjected to horizontal component force, three fixture blocks linearly slide at constant speed until the inner hole of the workpiece is tightly supported, and the self-centering and clamping of the workpiece are realized; and controlling any semicircular concave arc of the excircle of the self-centering chuck to align and prop up the elastic cylindrical pin, and further processing an oil film groove. The utility model discloses possess from centering, indexing positioning accurate reliable, radial and axial scurry the characteristics that the volume is little, station switching speed is fast, light and convenient easy transportation, can be used to in the rotating ring processing, reduce the auxiliary production time, improve production efficiency, reduce the operation degree of difficulty.

Description

Combustion engine rotating ring indexing positioning fixture

Technical Field

The utility model belongs to the technical field of precision machine makes, concretely relates to combustion engine rotating ring graduation positioning fixture.

Background

The moving ring is a part of the gas turbine with the same importance as the blade, and the position of the moving ring is distributed between each bearing of the gas turbine and the graphite ring. Is an important ring for bearing dynamic-static transition and separating oil and gas. The quality of the graphite ring directly influences the lubricating effect and the vibration amplitude of the gas turbine during operation and the separation effect of the oil and the gas circuit of the gas turbine, and once the graphite ring fails in lubrication or is damaged due to vibration or the oil is mixed into the gas circuit, the gas turbine cannot work in severe cases.

In the manufacturing process of the movable ring, oil grooves and oil film grooves which are circumferentially and angularly uniformly distributed need to be machined at one end of the movable ring, each oil groove and each oil film groove are connected end to form a group, and the total number of the oil grooves and the oil film grooves is forty groups in a complete circle.

And after the whole rotating profile of the movable ring is completely processed, processing of an oil film groove and an oil groove is required. The specific processing method comprises the steps of processing each oil film groove one by one through a special process, then performing an electric forming process, positioning the oil grooves according to the tail edges of the oil film grooves in the sequence, processing the oil grooves one by one, and ensuring that the connection is correct. The oil film groove and the oil groove are circumferentially and evenly distributed in an angular direction and the groove type is connected end to end, which is a fundamental index for ensuring that the moving ring can effectively play a role. The traditional guarantee method is mainly a scribing method, and has large error and difficult alignment. Therefore, a positioning device is needed, which has the characteristics of self-centering, accurate and reliable indexing positioning, small radial and axial movement amount, high station conversion speed, convenience and easiness in transportation, so that the auxiliary production time is reduced while the design requirement of the movable ring is met, the production efficiency is improved, and the operation difficulty of workers is reduced.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a combustion engine rotating ring graduation positioning fixture.

A kind of combustion engine rotating ring index positioning fixture, including wedging from the centering chuck mechanism, rotating the bottom plate mechanism of the mandrel, spring catch mechanism; the wedging self-centering chuck mechanism comprises a self-centering chuck, a clamping block, a locking block, a mandrel, a thin nut, a spring washer and a flat washer; the rotating mandrel bottom plate mechanism comprises a base, a pressing plate, a cover plate and a bearing;

the inner cavity of the base is in interference fit with the outer ring of the bearing, and the bearing cannot axially move in the inner cavity of the base through the pressing plate; the bearing inner ring is in interference fit with the mandrel; the cover plate is fixed at the bottom end of the mandrel, so that the bearing cannot axially move on the mandrel; the self-centering chuck penetrates into the mandrel to be attached to the step end; the thin nut, the spring washer, the flat washer and the locking block are sleeved into the mandrel one by one from top to bottom; the clamping blocks are three and slide into three T-shaped grooves of the self-centering chuck one by one, so that the wedge surfaces of the clamping blocks are attached to the wedge surfaces of the locking blocks; when the thin nut is screwed downwards, the locking block is extruded and descends, and the wedge surface of the locking block enables the clamping block to perform equal-variable linear sliding until the workpiece is tightly supported, so that self-centering and clamping are realized;

the spring pin seat mechanism comprises a positioning frame, a cylindrical pin, a plug and a spring; the positioning frame is arranged on the base; the self-centering chuck is characterized in that semicircular concave arcs are distributed on the outer circle of the self-centering chuck along the circumference, the diameter of each semicircular concave arc is slightly smaller than the diameter of a pin head of the cylindrical pin, the spring and the plug are sequentially arranged in an inner cavity of the positioning frame and the plug is screwed to prevent the spring from bouncing off or falling off, the pin head can be extended out by the elastic force given by the spring, and the space height and the extending length of the pin head just support the semicircular concave arcs distributed on the outer circle of the self-centering chuck, so that the angular positioning is realized.

Furthermore, the bearing adopts deep groove ball bearings, and two rows of deep groove ball bearings are matched for use and can eliminate the clearance between the rolling bodies of the bearing and the inner and outer rings of the bearing under the action of unidirectional axial force to improve the rotation precision.

Further, the device also comprises a handle and a rotating handle; the handle and the base are welded into a whole, so that the handle is convenient to transport and hold; the rotating handle is connected to the self-centering chuck through threads; through rotating a rotating handle linked with the self-centering chuck, any semicircular concave arc of the excircle of the self-centering chuck is aligned with and tightly propped against a cylindrical pin of the spring pin seat mechanism, and an oil film groove is processed on a workpiece.

The beneficial effects of the utility model reside in that:

the utility model provides a gas turbine rotating ring indexing positioning fixture, which is characterized in that the small end surface of a rotating ring workpiece is attached and placed on a self-centering chuck, a thin nut is screwed downwards, a locking block can also descend under extrusion, the wedge surface of the locking block enables a fixture block to be subjected to horizontal component force, and three fixture blocks linearly slide at constant speed until the inner hole of the workpiece is tightly supported, so that the self-centering and clamping of the workpiece are realized; and controlling any semicircular concave arc of the excircle of the self-centering chuck to align and tightly push against the elastic cylindrical pin, and further processing an oil film groove. The utility model discloses possess from centering, indexing positioning accurate reliable, radial and axial scurry the characteristics that the volume is little, station switching speed is fast, light and convenient easy transportation, can be used to in the rotating ring processing, reduce the auxiliary production time, improve production efficiency, reduce the operation degree of difficulty.

Drawings

Fig. 1-1 is a front view of the indexing positioning fixture for the rotating ring of the gas turbine of the present invention.

Fig. 1-2 isbase:Sub>A cross-sectional viewbase:Sub>A-base:Sub>A of fig. 1-1.

Fig. 1-3 are top views of the indexing positioning fixture for the rotating ring of the gas turbine of the present invention.

Fig. 1-4 are general schematic views of a gas turbine rotating ring indexing positioning fixture of the present invention.

Fig. 2-1 is a top view of the base of the present invention.

Fig. 2-2 is a cross-sectional view of the base of the present invention.

Fig. 3-1 is a top view of the self-centering chuck of the present invention.

Fig. 3-2 is a sectional view B-B of fig. 3-1.

Fig. 3-3 isbase:Sub>A cross-sectional viewbase:Sub>A-base:Sub>A of fig. 3-1.

Fig. 3-4 are front views of the self-centering chuck of the present invention.

Fig. 3-5 are enlarged partial schematic views at I in fig. 3-4.

Fig. 3-6 is a cross-sectional view at a in fig. 3-2.

Fig. 4-1 is a top view of the locking block of the present invention.

Fig. 4-2 isbase:Sub>A cross-sectional viewbase:Sub>A-base:Sub>A of fig. 4-1.

Fig. 5-1 is a front view of the middle clip block of the present invention.

Fig. 5-2 is a side view of the middle latch of the present invention.

Fig. 5-3 are top views of the fixture block of the present invention.

Fig. 6 is a diagram of a material object of the indexing positioning fixture for the rotating ring of the gas turbine of the present invention.

Detailed Description

The present invention will be further described with reference to the accompanying drawings.

The utility model relates to a gas turbine rotating ring oil film groove graduation positioner, specifically speaking relate to a circumference angle from centering evenly divides graduation positioning fixture belongs to the precision machinery and makes the field.

The moving ring is a part of the gas turbine which is as important as the blades, and the quality of the moving ring directly influences the lubricating effect and the vibration state of the gas turbine during operation and the separation effect of oil and gas circuits. An important index of the moving ring is an oil film groove and an oil groove, and tiny position errors of the groove can affect the service life and the use effect of the moving ring when the moving ring rotates at high speed.

The traditional guarantee method is mainly a scribing method, and has large error and difficult alignment. Therefore, a positioning device is needed, which has the characteristics of self-centering, accurate and reliable indexing positioning, small radial and axial movement amount, high station conversion speed, convenience and easiness in transportation, so that the auxiliary production time is reduced while the design requirement of the movable ring is met, the production efficiency is improved, and the operation difficulty of workers is reduced. The utility model discloses can effectively solve this problem, convert labour saving and time saving's mechanical operation into with hard manual work consuming time to easy and simple to handle, practical value are high.

Example 1:

a kind of combustion engine rotating ring index positioning fixture, including wedging from the centering chuck mechanism, rotating the bottom plate mechanism of the mandrel, spring catch mechanism; the wedging self-centering chuck mechanism comprises a self-centering chuck 2, a clamping block 3, a locking block 4, a core shaft 6, a thin nut 112, a spring washer 113 and a flat washer 114; the rotating mandrel bottom plate mechanism comprises a base 1, a pressure plate 7, a cover plate 8 and a bearing 116;

the inner cavity of the base 1 is in interference fit with the outer ring of the bearing 116, and the bearing 116 cannot axially move in the inner cavity of the base 1 through the pressing plate 7; the inner ring of the bearing 116 is in interference fit with the mandrel 6; the cover plate 8 is fixed at the bottom end of the mandrel 6, so that the bearing 116 cannot axially move on the mandrel 6; the self-centering chuck 2 penetrates into the mandrel 6 to be attached to the step end; the thin nut 112, the spring washer 113, the flat washer 114 and the locking block 4 are sleeved into the core shaft 6 one by one from top to bottom; the three clamping blocks 3 slide into three T-shaped grooves of the self-centering chuck 2 one by one, and the wedge surfaces of the clamping blocks 3 are attached to the wedge surfaces of the locking blocks 4; when the thin nut 112 is screwed downwards, the locking block 4 is extruded and descends, and the wedge surface of the locking block 3 makes an equal-variable linear sliding until a workpiece is tightly supported, so that self-centering and clamping are realized;

the spring pin seat mechanism comprises a positioning frame 5, a cylindrical pin 119, a plug 118 and a spring 111; the positioning frame 5 is arranged on the base 1; semicircle concave arcs are distributed on the outer circle of the self-centering chuck 2 along the circumference, the diameter of the semicircle concave arcs is slightly smaller than the diameter of a pin head of the cylindrical pin 119, the spring 111 and the plug 118 are sequentially arranged in the inner cavity of the positioning frame 5 and the plug 118 is screwed to prevent the spring 111 from bouncing off or falling off, the pin head can be extended out by the cylindrical pin 119 under the elastic force given by the spring 111, and the space height and the extending length of the pin head just support the semicircle concave arcs distributed on the outer circle of the self-centering chuck 2 to realize angular positioning.

Example 2:

further, a handle 9 and a rotating handle 10 are also included; the handle 9 and the base 1 are welded into a whole, so that the transportation and the holding are convenient; the rotating handle 10 is linked to the self-centering chuck 2 through a thread;

firstly, the small end face of the movable ring workpiece is attached to and placed on the self-centering chuck 2, the thin nut 112 is screwed downwards, the locking block 4 is extruded and also descends, the wedge surface of the locking block promotes the fixture block 3 to be subjected to horizontal component force, and the three fixture blocks 3 linearly slide at a constant speed until the inner hole of the workpiece is tightly supported, so that the self-centering and clamping of the workpiece are realized. And rotating a rotating handle 10 linked with the self-centering chuck 2 by a manual disc so that any groove on the excircle of the self-centering chuck 2 is aligned with and tightly propped against the elastic cylindrical pin 119. After an oil film groove is machined, the rotary handle 10 is manually turned again, so that the cylindrical pin 119 enters the next groove of the self-centering chuck 2 (8230), and the oil film groove is machined for a circle. And (4) holding the handle 9, transferring the tool to other equipment, and processing the circumferential oil groove according to the same method.

Example 3:

an object of the utility model is to provide a graduation positioning fixture of processing rotating ring realizes can be from functions such as centering alignment, graduation reliable, station switching speed is fast, the drunkenness volume is little, convenient transfer. The utility model provides a pair of novel combustion engine rotating ring graduation positioning fixture mainly includes that the wedge is tight from centering chuck mechanism, rotation dabber bottom plate mechanism, spring catch seat mechanism:

the wedging self-centering chuck mechanism comprises a self-centering chuck 2, a clamping block 3, a locking block 4, a mandrel 6, a rotary handle 10, a thin nut 112, a spring washer 113 and a flat washer 114. The chuck 2 penetrates into the core shaft 6 to be attached to the stepped end, the thin nut 112, the spring washer 113, the flat washer 114 and the locking block 4 are sequentially sleeved into the core shaft 6 from top to bottom, the three clamping blocks 3 slide into three T-shaped grooves of the chuck 2 one by one, the wedge surfaces of the clamping blocks 3 are guaranteed to be attached to the wedge surfaces of the locking block 4, and the rotary handle 10 is connected to the self-centering chuck 2 through threads (when the thin nut 112 is screwed downwards, the locking block 4 is extruded to descend, and the wedge surfaces enable the clamping blocks 3 to slide linearly in an equal variable manner until the workpiece is tightly supported, so that self-centering and clamping are achieved).

The rotating mandrel bottom plate mechanism comprises a base 1, a pressure plate 7, a cover plate 8, a bearing 116, an inner hexagon screw 115 and a handle 9. Handle 9 and base 1 welding become an organic whole and be convenient for transport and hold, base 1's inner chamber and bearing 116 outer lane interference fit screw press plate 7 and ensure that the bearing can't be at base 1 inner chamber axial float, bearing 116 inner circle and 6 interference fit of dabber, fix apron 8 in 6 bottoms of dabber with hexagon socket head cap screw 115, ensure that the bearing can't the axial float at the spindle (two are listed as deep groove ball bearing and use in coordination, and receive one-way axial force, can eliminate bearing rolling element itself and the clearance improvement gyration precision of inner and outer lane).

The spring pin seat mechanism comprises a chuck 2, a positioning frame 5, a cylindrical pin 119, a plug 118, a spring 111 and a socket head cap screw 117. The positioning frame 5 and the base 1 are in threaded connection through the hexagon socket head cap screws 117, the cylindrical pin 119, the spring 111 and the screw plug 118 are sequentially arranged in the inner cavity of the positioning frame 5, the screw plug 118 is screwed to prevent the spring 111 from bouncing off or falling off, the cylindrical pin 119 can extend out of a pin head under the elastic force given by the spring 111, the spatial height and the extension length of the pin head just prop against a semicircular concave arc distributed on the outer circle of the chuck 2, and angular positioning is achieved (the diameter of the concave arc is slightly smaller than that of the pin head), so that the two-point contact positioning can be guaranteed to be unique and reliable all the time, meanwhile, the spring pin is simple in telescopic operation, and the rapid station switching 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

1. The utility model provides a combustion engine rotating ring graduation positioning fixture which characterized in that: the self-centering wedge-caulking self-centering mechanism comprises a wedge-caulking self-centering chuck mechanism, a rotating mandrel bottom plate mechanism and a spring pin seat mechanism; the wedging self-centering chuck mechanism comprises a self-centering chuck (2), a clamping block (3), a locking block (4), a mandrel (6), a thin nut (112), a spring washer (113) and a flat washer (114); the rotating mandrel bottom plate mechanism comprises a base (1), a pressing plate (7), a cover plate (8) and a bearing (116);

the inner cavity of the base (1) is in interference fit with the outer ring of the bearing (116), and the bearing (116) cannot axially move in the inner cavity of the base (1) through the pressure plate (7); the inner ring of the bearing (116) is in interference fit with the mandrel (6); the cover plate (8) is fixed at the bottom end of the mandrel (6) to ensure that the bearing (116) cannot axially move on the mandrel (6); the self-centering chuck (2) penetrates through the mandrel (6) to be attached to the step end; the thin nut (112), the spring washer (113), the flat washer (114) and the locking block (4) are sleeved into the mandrel (6) one by one from top to bottom; the three clamping blocks (3) slide into three T-shaped grooves of the self-centering chuck (2) one by one, and the wedge surfaces of the clamping blocks (3) are attached to the wedge surfaces of the locking blocks (4); when the thin nut (112) is screwed downwards, the locking block (4) is extruded to descend, and the wedge surface enables the clamping block (3) to perform equal-variable linear sliding until a workpiece is tightly supported, so that self-centering and clamping are realized;

the spring pin seat mechanism comprises a positioning frame (5), a cylindrical pin (119), a plug (118) and a spring (111); the positioning frame (5) is arranged on the base (1); from having semicircle concave arc along circumference distribution on centering chuck (2) excircle, semicircle concave arc diameter slightly is less than the round pin head diameter of cylindric lock (119), spring (111), plug (118) are packed into in proper order in locating rack (5) inner chamber and are screwed plug (118) and prevent that spring (111) from flying or droing, and round pin (119) can be visited out the round pin head by the elasticity that spring (111) gave, and this round pin head space height just withstands from the semicircle concave arc that circumference distributed on centering chuck (2) excircle with extension length, realizes the angular positioning.

2. The indexing positioning fixture for the rotating ring of the internal combustion engine as claimed in claim 1, wherein: the bearing (116) adopts deep groove ball bearings, and two rows of deep groove ball bearings are matched for use and can eliminate the clearance between the rolling bodies of the bearing and the inner and outer rings thereof and improve the rotation precision under the action of unidirectional axial force.

3. The indexing positioning fixture for the rotating ring of the internal combustion engine as claimed in claim 1, wherein: also comprises a handle (9) and a rotating handle (10); the handle (9) and the base (1) are welded into a whole so as to be convenient to transport and hold; the rotating handle (10) is linked on the self-centering chuck (2) through threads; through rotating a rotating handle (10) linked with the self-centering chuck (2), any semicircular concave arc of the excircle of the self-centering chuck (2) is aligned with and tightly pushed against a cylindrical pin (119) of a spring pin seat mechanism, and an oil film groove is processed on a workpiece.