CN111070050B

CN111070050B - Precise grinding processing equipment for gas turbine blade

Info

Publication number: CN111070050B
Application number: CN201911309752.5A
Authority: CN
Inventors: 潘晓铭; 刘德; 邱辉; 谷志阳
Original assignee: Wenzhou University
Current assignee: Wenzhou University
Priority date: 2019-12-18
Filing date: 2019-12-18
Publication date: 2020-09-11
Anticipated expiration: 2039-12-18
Also published as: CN111070050A

Abstract

The invention relates to the technical field of grinding equipment and discloses precise grinding equipment for a gas turbine blade, which comprises a supporting table, wherein a supporting column is fixedly arranged on one side of the upper surface of the supporting table, a support is fixedly arranged at the top of the supporting column, a driving motor is fixedly arranged on the upper surface of the support, a driving wheel is fixedly sleeved at the top end of an output shaft of the driving motor, a grinding abrasive belt is movably connected onto the driving wheel, and a driven wheel is movably connected to the other side of the grinding abrasive belt. According to the invention, the scale column is movably sleeved in the fixed block, and the other end of the scale column is fixedly sleeved in the supporting block, so that the current scale can be observed when the scale column is stretched out, and one side of the fixed block is vertical and horizontal to one side of the grinding abrasive belt, so that precise grinding can be carried out according to the scale of the scale column, the precision of the device is improved, the processing reliability is ensured, and the stability of the device is improved.

Description

Precise grinding processing equipment for gas turbine blade

Technical Field

The invention relates to the technical field of grinding equipment, in particular to precise grinding equipment for a gas turbine blade.

Background

The gas turbine is widely applied to the fields of airplanes, ships and the like, and is easy to generate fatigue failure under the extreme conditions of high temperature, high pressure, high load, high corrosion and severe working condition state change. The blade is a core component of the gas turbine, and the control of the surface integrity of the blade has important influence on the working performance and the service life of the blade.

In order to overcome the defects of uneven pressure and uneven rotational flow at each hole and uneven cooling effect caused by the linear arrangement of cooling holes of a nozzle of a blade of the existing gas turbine from the blade tip to a hub, the cooling holes of the blade of the gas turbine are designed into an arrangement form adapting to the rotation direction of a swirler of a combustor, and in the right-hand rotation direction, the cooling holes at the blade tip of the front edge of the blade are more left than the cooling holes at the hub when viewed from the upstream of airflow; in the case of left-handed rotation, the cooling holes at the tip of the leading edge of the blade are more to the right than the cooling holes at the hub, as viewed upstream in the air flow, so that a uniform pressure, flow field and cooling effect is achieved at each cooling hole.

The existing abrasive belt grinding device only drives an abrasive belt to rotate by a motor so as to grind, all the existing abrasive belt grinding device depends on feeling, the precision is not high, the existing abrasive belt grinding device cannot be used for machining a gas turbine blade, meanwhile, the existing technology does not have a device for clamping a machined part, the manual support is needed, the labor intensity is high, people can feel fatigue, and the arms of people can be sore once the grinding time is long, so that the parts are excessively damaged by grinding.

Disclosure of Invention

The invention provides gas turbine blade precision grinding equipment which has the advantages of visual grinding distance, stable clamping, simplicity in use, low labor intensity and capability of being set to be automatic, and solves the problems in the background art.

The invention provides the following technical scheme: a gas turbine blade precision grinding processing device comprises a supporting table, wherein a supporting column is fixedly installed on one side of the upper surface of the supporting table, a support is fixedly installed at the top of the supporting column, a driving motor is fixedly installed on the upper surface of the support, a driving wheel is fixedly sleeved on the top end of an output shaft of the driving motor, a grinding abrasive belt is movably connected onto the driving wheel, a driven wheel is movably connected onto the other side of the grinding abrasive belt, a supporting leg is fixedly installed on the lower surface of the supporting table, a fixed block is fixedly installed on one side of the supporting leg, a scale column is movably sleeved on the other end of the fixed block, a supporting block is fixedly sleeved on the other end of the scale column, an adjusting bolt is sleeved on the supporting block through threads, a telescopic rod is fixedly installed on the upper surface of the supporting, the middle part screw thread of fastening screw has cup jointed the grip block, the bottom fixed mounting of grip block has buffer spring, buffer spring's bottom fixed mounting has the soft board.

Carefully, still include another grip block, another grip block fixed mounting is in fastening screw's bottom, the grip block includes the thread bush, the thread bush screw thread cup joints on fastening screw, and the both sides fixed mounting of thread bush has the sliding block, the sliding block joint is in the dead lever, the other both sides fixed mounting of thread bush has the backup pad.

Carefully selecting, the bottom of the driven wheel is connected to the upper surface of the supporting table in a sliding mode, and a pressure spring is fixedly mounted on one side of the bottom of the driven wheel.

Carefully selecting, the bottom of supporting leg is fixed to be cup jointed and is removed the wheel.

And carefully selecting, wherein one side of the fixed block, which is close to the scale column, is vertical and horizontal to the same side of the supporting table and the grinding abrasive belt, and the scale column limits the position of the supporting block.

And carefully selecting, wherein the top end of the adjusting bolt penetrates through the supporting block and is clamped in the fixing block, and the adjusting bolt is connected with a driving source.

Carefully selecting, the bottom fixed mounting of fastening screw has the fixture block, the fixture block joint is in the bottom of dead lever.

The shape of the fixing rod is annular, and a clamping plate is connected to the inside of the fixing rod in a sliding mode.

And carefully selecting, wherein the soft board is in a circular ring shape, and the inner side of the soft board is not in contact with the fixed rod.

The invention has the following beneficial effects:

1. according to the invention, the scale column is movably sleeved in the fixed block, and the other end of the scale column is fixedly sleeved in the supporting block, so that the current scale can be observed when the scale column is stretched out, and one side of the fixed block is vertical and horizontal to one side of the grinding abrasive belt, so that precise grinding can be carried out according to the scale of the scale column, the precision of the device is improved, the processing reliability is ensured, and the stability of the device is improved.

2. According to the clamping device, the clamping plate is sleeved in the middle of the fastening screw in a threaded manner, and the other clamping plate is fixedly sleeved at the bottom of the fastening screw, so that the clamping plate is driven to ascend or descend when the fastening screw rotates, a workpiece is clamped, the defect of manual support is overcome, the processing reliability of the device is improved, and meanwhile, the soft plate connected through the buffer spring is arranged on one side of the clamping plate, so that the damage caused by hard collision between the workpiece and a structure is avoided, and the safety of the device is improved.

3. According to the invention, the telescopic rod is arranged at the bottom of the fixed rod, so that a workpiece clamped by the clamping plate can be lifted by utilizing the telescopic rod, the grinding is more uniform, meanwhile, a driving device can be arranged at the top end of the fastening screw to drive the fastening screw to rotate, the high automation of the device can be realized, and the automation process of the device is improved.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic view of a structural driven wheel of the present invention;

FIG. 3 is a schematic view of a structural clamping plate of the present invention.

In the figure: 1. a support table; 2. a support pillar; 3. a support; 4. a drive motor; 5. a driving wheel; 6. grinding the abrasive belt; 7. a driven wheel; 8. supporting legs; 9. a fixed block; 10. a scale post; 11. a support block; 12. adjusting the bolt; 13. a telescopic rod; 14. a clamping block; 15. fastening a screw rod; 16. fixing the rod; 17. a clamping plate; 171. a threaded sleeve; 172. a slider; 173. a support plate; 18. a buffer spring; 19. and (4) a soft board.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-3, a gas turbine blade precision grinding processing device comprises a supporting table 1, a supporting column 2 is fixedly installed on one side of the upper surface of the supporting table 1, a support 3 is fixedly installed on the top of the supporting column 2, a driving motor 4 is fixedly installed on the upper surface of the support 3, a driving wheel 5 is fixedly sleeved on the top end of an output shaft of the driving motor 4, a grinding abrasive belt 6 is movably connected onto the driving wheel 5, a driven wheel 7 is movably connected onto the other side of the grinding abrasive belt 6, the bottom of the driven wheel 7 is slidably connected onto the upper surface of the supporting table 1, a pressure spring is fixedly installed on one side of the bottom of the driven wheel 7, and the bottom of the driven wheel 7 is slidably connected onto the upper surface of the supporting table 1, so that when grinding is carried out, a certain buffer distance is provided, thereby the, the lower surface of the supporting table 1 is fixedly provided with supporting legs 8, the bottoms of the supporting legs 8 are fixedly sleeved with moving wheels, the bottoms of the supporting legs 8 are provided with the moving wheels, so that the device can be driven to move through the moving wheels at the bottoms of the supporting legs 8, the flexibility of the device is improved, one side of each supporting leg 8 is fixedly provided with a fixing block 9, one side of each fixing block 9 close to a scale column 10 is vertical and horizontal to the same side of the supporting table 1 and the grinding abrasive belt 6, the position of each supporting block 11 is limited by the scale column 10, the vertical plane of each fixing block 9 close to the scale column 10 is vertical and horizontal to the same side of the supporting table 1 and the grinding abrasive belt 6, so that the grinding distance can be adjusted by the fixing block 9, the reliability of the device is improved, the positions of the supporting blocks 11, the reasonability of the structure is ensured, the other end of the fixed block 9 is movably sleeved with the scale column 10, the other end of the scale column 10 is fixedly sleeved with the supporting block 11, the adjusting bolt 12 is sleeved on the supporting block 11 in a threaded manner, the top end of the adjusting bolt 12 penetrates through the supporting block 11 and is clamped in the fixed block 9, the adjusting bolt 12 is connected with a driving source, the top end of the adjusting bolt 12 is arranged to penetrate through the middle part of the supporting block 11 and is clamped in the fixed block 9, so that the supporting block 11 can be driven to slide left or right by rotating the adjusting bolt 12, the basis of adjustment of the device is ensured, meanwhile, the driving source can be arranged at the top end of the adjusting bolt 12 to drive the adjusting bolt 12 to rotate, the device can realize high automation, the telescopic rod 13 is fixedly installed on the upper surface of the supporting block 11, the fixed rod 16 is fixedly installed at the, the shape of the fixing rod 16 is set to be annular, so that the fastening screw 15 and the clamping plate 17 can be arranged in the fixing rod, the reasonability of the structure is ensured, meanwhile, the position of the clamping plate 17 is limited, the clamping plate 17 is prevented from rotating to cause incapability of use, the reliability of the device is improved, the fastening screw 15 is sleeved on the middle thread of the fixing rod 16, the clamping block 14 is fixedly arranged at the bottom end of the fastening screw 15, the clamping block 14 is clamped at the bottom of the fixing rod 16, the clamping block 14 clamped at the bottom of the fixing rod 16 is fixedly arranged at the bottom end of the fastening screw 15, the position of the fastening screw 15 is fixed, the device damage caused by the slippage of the fastening screw 15 is avoided, the safety of the device is improved, the clamping plate 17 is sleeved on the middle thread of the fastening screw 15, the other clamping plate 17 is further included, the other clamping, the clamping plate 17 comprises a threaded sleeve 171, the threaded sleeve 171 is sleeved on the fastening screw 15 in a threaded manner, sliding blocks 172 are fixedly mounted on two sides of the threaded sleeve 171, the sliding blocks 172 are clamped in the fixing rod 16, supporting plates 173 are fixedly mounted on the other two sides of the threaded sleeve 171, the two clamping plates 17 are respectively fixedly sleeved at the bottom of the fastening screw 15 and sleeved in the middle of the fastening screw 15 in a threaded manner, so that the threaded sleeve 171 can be driven to slide downwards by utilizing the rotation of the fastening screw 15, the sliding blocks 172 are driven to slide in the side wall of the fixing rod 16, the supporting plates 173 are finally driven to descend and clamp a workpiece by matching with the clamping plate 17 at the bottom, the clamping stability of the device is improved, a buffer spring 18 is fixedly mounted at the bottom of the clamping plate 17, a soft plate 19 is fixedly mounted at the bottom of the buffer spring 18, the shape of the soft plate 19 is circular, and, set up soft board 19 into circularly to make the more firm of the centre gripping of soft board 19, set up the inboard diameter value of soft board 19 into the width value that is greater than dead lever 16 simultaneously, thereby make mutual noninterference between dead lever 16 and the soft board 19, improved the independence of structure.

The working principle is as follows: during the use, at first, whether each structure of inspection device normally works, the work piece is placed on the soft board 19 of below to the inspection is finished, utilize grip block 17 to support, then rotatory fastening screw 15 drives grip block 17 and pushes down, soft board 19 until the top grasps the work piece, then adjust the distance that needs the grinding through the scale on the scale post 10, thereby make the grinding more accurate, can adjust the lift of work piece through telescopic link 13 simultaneously, thereby the homogeneity of grinding has been guaranteed, and finally, take off the work piece after finishing the grinding, and clean the sweeps, can.

In addition, the gas turbine blade processed by the method can be subjected to subsequent precise grinding process experiments and simulation, and the material-abrasive particle interaction mechanism, the precise grinding temperature field and stress-strain field and precise grinding heat/force coupling application rule, the precise grinding surface layer burn and surface layer microstructure, microhardness and residual stress forming mechanism in the precise grinding process can be researched. Researching the influence rule of the surface integrity on fatigue through experiments and tests, and analyzing the influence rule of fatigue strength stress concentration; and analyzing a fatigue failure mechanism through the port morphological characteristics and the fatigue simulation model and finally obtaining a fatigue constraint process control method, thereby improving the fatigue resistance of the gas turbine blade after grinding.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Meanwhile, in the drawings of the invention, the filling pattern is only used for distinguishing the layers and is not limited at all.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a gas turbine blade precision abrasive machining equipment, includes brace table (1), its characterized in that: the grinding device is characterized in that a support column (2) is fixedly mounted on one side of the upper surface of the support table (1), a support (3) is fixedly mounted at the top of the support column (2), a driving motor (4) is fixedly mounted on the upper surface of the support (3), a driving wheel (5) is fixedly sleeved on the top end of an output shaft of the driving motor (4), a grinding abrasive belt (6) is movably connected onto the driving wheel (5), a driven wheel (7) is movably connected onto the other side of the grinding abrasive belt (6), a support leg (8) is fixedly mounted on the lower surface of the support table (1), a fixed block (9) is fixedly mounted on one side of the support leg (8), a scale column (10) is movably sleeved on the other end of the fixed block (9), a support block (11) is fixedly sleeved on the other end of the scale column, and the upper surface of supporting shoe (11) fixed mounting has telescopic link (13), the top fixed mounting of telescopic link (13) has dead lever (16), fastening screw (15) have been cup jointed to the middle part screw thread of dead lever (16), grip block (17) have been cup jointed to the middle part screw thread of fastening screw (15), the bottom fixed mounting of grip block (17) has buffer spring (18), the bottom fixed mounting of buffer spring (18) has soft board (19).

2. The precision grinding processing equipment for the gas turbine blade according to claim 1, characterized in that: still include another grip block (17), another grip block (17) fixed mounting is in the bottom of fastening screw (15), grip block (17) are including thread bush (171), thread bush (171) screw thread cup joints on fastening screw (15), and the both sides fixed mounting of thread bush (171) has sliding block (172), sliding block (172) joint is in dead lever (16), the other both sides fixed mounting of thread bush (171) has backup pad (173).

3. The precision grinding processing equipment for the gas turbine blade according to claim 1, characterized in that: the bottom of the driven wheel (7) is connected to the upper surface of the supporting table (1) in a sliding mode, and a pressure spring is fixedly mounted on one side of the bottom of the driven wheel (7).

4. The precision grinding processing equipment for the gas turbine blade according to claim 1, characterized in that: the bottom of the supporting leg (8) is fixedly sleeved with a moving wheel.

5. The precision grinding processing equipment for the gas turbine blade according to claim 1, characterized in that: one side of the fixed block (9) close to the scale column (10) is vertical and horizontal to the same side of the supporting table (1) and the grinding abrasive belt (6), and the scale column (10) limits the position of the supporting block (11).

6. The precision grinding processing equipment for the gas turbine blade according to claim 1, characterized in that: the top end of the adjusting bolt (12) penetrates through the supporting block (11) and is clamped in the fixing block (9), and the adjusting bolt (12) is connected with a driving source.

7. The precision grinding processing equipment for the gas turbine blade according to claim 1, characterized in that: the bottom end of the fastening screw rod (15) is fixedly provided with a clamping block (14), and the clamping block (14) is clamped at the bottom of the fixing rod (16).

8. The precision grinding processing equipment for the gas turbine blade according to claim 1, characterized in that: the fixing rod (16) is annular, and a clamping plate (17) is connected to the inside of the fixing rod (16) in a sliding mode.

9. The precision grinding processing equipment for the gas turbine blade according to claim 1, characterized in that: the soft board (19) is in a circular ring shape, and the inner side of the soft board (19) is not in contact with the fixing rod (16).