CN219310707U - But gas turbine quick split degree special fixture - Google Patents

Abstract

The utility model relates to a special fixture capable of being quickly disassembled for a gas turbine, which comprises a guide rail bottom plate, a sliding turntable, a spring ejector pin and a quick-disassembly scale; the guide rail bottom plate is connected with the sliding turntable; the sliding turntable comprises a support, a supporting seat, a screw A, a bearing, a conical seat and a nut A; the supporting seat passes through the support seat and is fixed by the screw A, the bearing is sleeved on the supporting seat, the end face of the inner ring of the bearing is close to the stepped end face of the supporting seat, and then the conical seat and the other bearing are arranged; the quick-disassembly scale comprises a positioning disc, a pressing block, a positioning block, a gland, a gasket, a nut B and a handle; the pressing blocks are provided with three groups, and the pressing blocks and the positioning blocks are respectively arranged on three sliding grooves of the positioning plate; the gland, the gasket and the nut B are sleeved on the thread column of the positioning disk from bottom to top; the handle is arranged at the threaded hole of the positioning disc; the spring ejector pin is connected with the positioning disc. The utility model has accurate indexing, automatic centering, adjustable clamping force and high-efficiency resetting and assembling and disassembling, and is suitable for clamping the movable ring oil film groove.

Description

But gas turbine quick split degree special fixture

Technical Field

The utility model belongs to the technical field of laser processing, and particularly relates to a special fixture capable of being quickly disassembled for a gas turbine.

Background

The main body of the gas turbine consists of a rotor and a casing, and the movable ring is one of important core components for realizing the dynamic and static transition functions of the rotor and the casing, and has the main functions of realizing connection with a carbon ring to ensure the axial limit of the rotor, realizing sliding lubrication, collecting carbon scraps, isolating an oil circuit and a gas circuit, radiating heat, cooling and the like. The manufacturing difficulty core of the movable ring is that precise oil film grooves uniformly distributed on the circumference exist on the end face of the movable ring, and the micro structure directly determines whether the movable ring can work normally or not under working conditions, and whether a sliding oil film can act or not, so that the effects of lubrication, heat dissipation, oil gas isolation and the like are affected. Because of the importance of the structure function of the oil film groove, the size requirement is very strict, and the size is mostly the micrometer precision size, which is a great test on the processing process and the quality control.

Disclosure of Invention

The utility model aims to provide a fixture device for high-precision circumferential multi-angle positioning, quick disassembly and restoration of an oil film groove in movable ring machining, and meanwhile, the device also has a special fixture which is automatic in centering, adjustable in clamping force, convenient to operate and capable of being quickly disassembled and suitable for the requirements of workpieces with multiple diameters.

A special fixture for quick-detachable degree of a gas turbine comprises a guide rail bottom plate, a sliding turntable, a spring ejector pin and a quick-detachable dial; the guide rail bottom plate is connected with the sliding turntable; the sliding turntable comprises a support, a supporting seat, a screw A, a bearing, a conical seat and a nut A; the supporting seat passes through the support seat and is fixed by the screw A, the bearing is sleeved on the supporting seat, the end face of the inner ring of the bearing is close to the stepped end face of the supporting seat, and then the conical seat and the other bearing are arranged; the quick-disassembly scale comprises a positioning disc, a pressing block, a positioning block, a gland, a gasket, a nut B and a handle; the pressing blocks are provided with three groups and are respectively arranged on the three sliding grooves of the positioning disc with the positioning blocks; the gland, the gasket and the nut B are sleeved on the thread column of the positioning disc from bottom to top; the handle is arranged at the threaded hole of the positioning disc; the spring ejector pin is connected with the positioning disc.

Further, the guide rail bottom plate comprises a base, a linear guide rail and a screw B; the base is connected with the linear guide rail through a screw B.

Further, the spring jacking pin comprises a bolt, a screw plug, a support and a compression spring; the bolt and the compression spring are arranged in the inner cavity of the support, and the plug screw is used for plugging and adjusting the ejection elasticity of the ejector pin.

Furthermore, the sliding turntable and the quick-disassembly scale are matched through the taper shaft and the taper hole, so that the minimum number of workpieces is realized, five degrees of freedom are limited, the structure is simple, the space is saved, the sliding turntable is convenient to use on laser equipment with limited operation space, the performance is reliable, and the failure rate is low.

The utility model has the beneficial effects that: the guide rail bottom plate is connected with the sliding turntable through the double linear guide rails, so that the processing of workpieces with various diameter specifications can be met; the double-bearing anti-backlash structure is adopted in the sliding turntable, so that the clearance error of the bearing can be eliminated, and the tool precision is improved; the sliding turntable is matched with the quick-disassembly scale through the taper shaft and the taper hole, so that the limitation of five degrees of freedom (X, Y, Z, A, B shaft positioning) is realized by the minimum number of workpieces (two pieces), the structure is simple, the performance is reliable, the failure rate is low, meanwhile, interference or clearance does not exist in the large-angle taper shaft and the taper hole, and quick assembly and disassembly and quick assembly resetting are possible; the diameter of the pin ball head of the spring ejector pin is larger than that of the indexing clamping groove of the sliding turntable, and when the spring ejector pin and the sliding turntable are in a working state, the pin and the indexing clamping groove are actually in two-point contact, so that the position is unique and the positioning is accurate; the quick-disassembly scale finally realizes that three sliding blocks do synchronous motion along the radial direction to finish self-centering alignment and clamping through the pressing washer of the top nut and the pressing cover, the clamping force is in direct proportion to the pretightening force of the nut, the proper adjustment can be carried out according to the structural size, the rigidity and the strength of a workpiece in the operation process, and meanwhile, the self-centering structural space is small in occupied ratio, the structural composition is simple, and required parts are easy to process. In a word, the utility model has the advantages of accurate indexing, reliable positioning, automatic centering, adjustable clamping force, high-efficiency resetting, mounting and dismounting, convenient operation, high accuracy, stability, durability, high quality, high efficiency, convenient operation and suitability for popularization and use of clamping the movable ring oil film groove.

Drawings

FIG. 1 is a diagram of the design structure of the present utility model;

FIG. 2 is a schematic diagram of the structure of the present utility model;

FIG. 3 is a schematic view of the fixture of the present utility model mounted on a laser apparatus;

FIG. 4 is a view showing the construction of the bottom plate portion of the slide rail of the present utility model;

FIG. 5 is a schematic diagram of a portion of a sliding turret design of the present utility model;

FIG. 6 is a schematic diagram of a portion of a quick-disconnect dial of the present utility model;

FIG. 7 is a block diagram of a spring ejector pin portion design of the present utility model;

FIG. 8 is a block diagram of a positioning disk design of the quick release disk of the present utility model;

fig. 9 is an enlarged view of a portion of the position of the slide turret bearing of the present utility model.

In the figure: 1. the device comprises a base, 2, a support, 3, a bolt, 4, a screw plug, 5, a support, 6, a positioning disc, 7, a supporting seat, 8, a gasket, 9, a conical seat, 10, a pressing block, 11, a positioning block, 12, a handle, 13, a screw, 14, a gland, 101, a gasket, 102, a nut B,103, a nut A,104, a bearing, 105, a compression spring, 106, a screw D,107, a pin, 108, a linear guide rail, 109, a screw B,110, a screw C,111, a screw A,112 and a guide rail sliding block.

Detailed Description

The utility model is further described below with reference to the accompanying drawings.

1-9, including a guide rail base plate, a sliding turntable, a spring knock pin and a quick-release dial; the guide rail bottom plate is connected with the sliding turntable; the sliding turntable comprises a support 2, a support seat 7, a screw A111, a bearing 104, a conical seat 9 and a nut A103; the supporting seat 7 passes through the supporting seat 2 and is fixed by the screw A111, the bearing 104 is sleeved on the supporting seat 7, the end face of the inner ring of the bearing 104 is abutted against the stepped end face of the supporting seat 7, then the conical seat 9 and the other bearing 104 are arranged, the assembly mode can eliminate the rolling bodies and the gaps between the inner ring and the outer ring of the bearing, the motion stability and the motion precision are improved, then the gasket 8 and the nut A103 are sequentially sleeved at the small end of the supporting seat 7 and are pre-tightened to eliminate the axial gaps, and finally the guide rail sliding block 112 is fastened at the lower end of the supporting seat 2 by the screw C110; the quick-disassembly scale comprises a positioning disk 6, a pressing block 10, a positioning block 11, a pressing cover 14, a gasket 101, a nut B102 and a handle 12; the pressing blocks 10 are provided with three groups, and are respectively arranged on three sliding grooves of the positioning disc 6 together with the positioning blocks 11; the gland 14, the gasket 101 and the nut B102 are sleeved on the threaded column of the positioning disk 6 from bottom to top, the function of the structure is that the gland 14 and the gasket 101 move along the vertical direction by rotating the nut B102, and then the pressing block 10 and the positioning block 11 are extruded to synchronously stretch along the horizontal direction, so that the self-centering workpiece supporting is realized, and the clamping force can be controlled by adjusting the nut B102; the handle 12 is arranged at a threaded hole of the positioning disk 6; the spring ejector pin is connected with the positioning disk 6.

The guide rail bottom plate comprises a base 1, a linear guide rail 108 and a screw B109; the base 1 and the linear guide 108 are connected by a screw B109. The guide rail bottom plate is fixed with the machine tool equipment workbench through the pressing plate, and is connected with the sliding turntable through the linear guide rail and the guide rail sliding block, so that sliding and locking along the guide rail direction can be realized, and the gap error of the bearing can be eliminated by adopting a double-bearing gap eliminating structure inside the sliding turntable.

The spring jacking pin comprises a bolt 3, a screw plug 4, a support 5 and a compression spring 105; the bolt 3 and the compression spring 105 are arranged in the inner cavity of the support 5, the plug screw 4 is used for plugging and adjusting the ejection elasticity of the ejector pin, the diameter of the pin ball head of the spring ejector pin is larger than that of the indexing clamping groove of the sliding turntable, and when the bolt 3 and the compression spring are in a working state, the pin and the indexing clamping groove are actually in two-point contact, and the position is unique and the positioning is accurate.

The sliding turntable is matched with the quick-split dial through the taper shaft and the taper hole, the minimum number of workpieces (two workpieces) is realized, five degrees of freedom are limited (X, Y, Z, A, B limit, only the C shaft rotates), the structure is simple, the space is saved, the sliding turntable is convenient to use on laser equipment with limited operation space, the performance is reliable, the failure rate is low, the sliding turntable is matched with the quick-split dial through the taper shaft and the taper hole with large angles, the matching interference or the matching gap does not exist, and the quick-disassembly and the repeated positioning are realized.

The stepped end face of the quick-disassembly scale is used for bearing a workpiece, the bottom face of the workpiece is tightly attached to the stepped end face, the nut B102 at the top end of the quick-disassembly scale is rotated to extrude the gland so that the gland moves downwards along the vertical direction, then three positioning blocks 11 on the quick-disassembly scale are pushed to slide along the sliding groove at constant speed (radial sliding), self-centering positioning is realized until the three positioning blocks 11 tightly prop the inner hole of the workpiece, the upper end nut B102 is regulated to drive the gasket 101 and the gland 14 to extrude the sliding blocks in the three sliding grooves, so that the gasket and the gland do horizontal synchronous telescopic motion along the groove wall, and self-centering alignment and expansion clamping of three claws are realized. The clamping force is in direct proportion to the pretightening force of the nut, and the clamping force can be properly adjusted according to the structural size, rigidity and strength of the workpiece in the actual operation process. After the quick-disassembly scale clamps the workpiece, the plug screw of the spring ejector pin is adjusted, so that the pin head is ensured to be tightly propped in the indexing clamping groove of the outer circle of the quick-disassembly scale, namely, alignment is finished, and machining is performed. After finishing the processing of one oil film groove, the spring ejector pin is required to be pulled, the quick-split dial is rotated to the next indexing clamping groove station, and the process is repeated until finishing one circle of oil film groove processing.

The working principle of the utility model is specifically described below:

firstly, by adjusting the linear guide rail, workpieces with different diameters (the laser equipment has no mobile mechanical shaft, as shown in fig. 3) are adapted, and then the nut B102 at the upper end of the quick-release scale is rotated to realize self-centering alignment and expansion of the workpieces. The sliding turntable and the quick-split dial are matched through the taper holes of the taper shaft, so that the functions of rotating in the vertical direction and quickly assembling, disassembling and resetting are realized, the purpose of the quick-split dial is to facilitate quality monitoring at any time in the machining process, the quick-split dial can be transferred to a checking station together with a workpiece at any time (the depth tolerance of an oil film groove is micrometer precision, the oil film groove is required to be continuously detected in the machining process so as to ensure that the actual size is within the design tolerance range), and after the checking is finished, the quick-split dial is reinserted into the taper shaft through the taper hole at the lower end and is propped against the spring ejector pin to realize restoration positioning, so that the repeated positioning at the same position is ensured. Because the oil film grooves are uniformly distributed circumferentially, the spring ejector pins are required to be pressed against the indexing clamping grooves of the sliding turntable before machining. After each oil film groove is processed, the spring ejector pin is pulled out to rotate the quick-release scale, so that the spring ejector pin enters the indexing clamping groove of the next sliding rotary table and is tightly pushed, and the processing is completed for a circle.

The above description is only of the preferred embodiments of the present utility model and is not intended to limit the present utility model, but various modifications and variations can be made to the present utility model by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.

Claims (4)

1. The special fixture for the quick-detachable degree of the gas turbine is characterized by comprising a guide rail bottom plate, a sliding turntable, a spring ejector pin and a quick-detachable dial; the guide rail bottom plate is connected with the sliding turntable; the sliding turntable comprises a support A (2), a supporting seat (7), a screw A (111), a bearing (104), a conical seat (9) and a nut A (103); the supporting seat (7) passes through the supporting seat A (2) and is fixed by the screw A (111), the bearing (104) is sleeved on the supporting seat (7), the inner ring end surface of the bearing (104) is close to the step end surface of the supporting seat (7), and then the conical seat (9) and the other bearing (104) are arranged; the quick-disassembly scale comprises a positioning disc (6), a pressing block (10), a positioning block (11), a gland (14), a gasket (101), a nut B (102) and a handle (12); the pressing blocks (10) are provided with three groups, and the pressing blocks and the positioning blocks (11) are respectively arranged on three sliding grooves of the positioning disc (6); the gland (14), the gasket (101) and the nut B (102) are sleeved on the threaded column of the positioning disc (6) from bottom to top; the handle (12) is arranged at a threaded hole of the positioning disc (6); the spring ejector pin is connected with the positioning disc (6).

2. The quick detachable special fixture for a gas turbine according to claim 1, wherein the guide rail bottom plate comprises a base (1), a linear guide rail (108) and a screw B (109); the base (1) and the linear guide rail (108) are connected through a screw B (109).

3. The gas turbine quick detachable special fixture according to claim 1, wherein the spring ejector pin comprises a plug pin (3), a screw plug (4), a support B (5) and a compression spring (105); the bolt (3) and the compression spring (105) are arranged in the inner cavity of the support B (5), and the screw plug (4) is used for plugging and adjusting the ejection elasticity of the ejector pin.

4. The special fixture for the quick detachable degree of the gas turbine according to claim 1, wherein the sliding turntable and the quick detachable dial are matched through a taper shaft and a taper hole, so that the minimum number of workpieces is realized, five degrees of freedom are limited, the structure is simple, the space is saved, the use on laser equipment with limited operation space is facilitated, the performance is reliable, and the failure rate is low.

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