Water turbine blade flange honing device convenient to fix

Abstract

The invention relates to the technical field of water turbine machining equipment, in particular to a water turbine blade flange honing device convenient to fix, which comprises a bottom plate and a supporting table mounted on the bottom plate, a rotating column is rotatably arranged on one side of the bottom plate, the end part of the rotating column is connected with honing equipment for honing a flange, and a bearing plate is movably arranged at the top of the supporting table; the supporting table is provided with a circular groove matched with the bearing plate, and the bearing mechanism is arranged in the supporting table and connected with the bearing plate and used for enabling the bearing plate to drive the flange to move downwards slowly. Four sets of clamping mechanisms synchronously acting are arranged on the outer side of the supporting table in a surrounding mode, linkage control of a pressure sensor and a controller is combined, after a flange is placed, an electric push rod can be automatically triggered to drive a push plate and an anti-skid pad to conduct four-point symmetrical clamping on the flange, efficient and stable fixing of the flange can be automatically achieved, friction force is increased through the anti-skid pad, and the flange clamping effect is improved. And the machining precision is effectively prevented from being influenced by vibration displacement of the flange during honing.

Description

Technical Field

[0001] This invention relates to the field of hydraulic turbine processing equipment technology, specifically to a honing device for hydraulic turbine blade flanges that is easy to fix. Background Technology

[0002] In the manufacturing and maintenance of water turbines, the blade flange is a core connecting component. The honing accuracy of its end face directly affects the sealing performance and operational stability of the equipment. However, these flanges are mostly heavy and large-sized workpieces. In the current technology, the commonly used manual mechanical clamping method is cumbersome and results in low processing efficiency. At the same time, because the water turbine blade flange is heavy, when it is placed on the device support platform by hoisting equipment, the existing equipment lacks an effective buffer mechanism. The huge impact force will directly act on the support platform. Long-term use can easily cause deformation of the top surface of the support platform and loosening of the internal structure, which will significantly shorten the service life of the equipment. Summary of the Invention

[0003] The purpose of this invention is to provide a honing device for turbine blade flanges that is easy to fix. By integrating automatic clamping, buffer protection and synchronous cleaning functions, it can achieve efficient and stable fixing of heavy-duty large-size flanges, reduce the impact damage to the support platform when the flange is placed, and improve the honing efficiency, so as to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, the present invention provides the following technical solution: a honing device for turbine blade flanges that is easy to fix, comprising a base plate and a support platform mounted on the base plate, and further comprising: A rotating column is rotatably mounted on one side of the base plate, and its end is connected to a honing device for honing flanges; The receiving plate is movably mounted on the top of the support platform, and the support platform has a circular groove that fits the receiving plate. The bearing mechanism is set inside the support platform and connected to the receiving plate, and is used to enable the receiving plate to drive the flange to move slowly downward; A clamping mechanism, arranged around the outside of the support platform, is used to fix the flange placed on the receiving plate; A pressure sensor, located at the bottom of the circular groove, is electrically connected to the controller in the clamping mechanism and is used to control the movement of the clamping mechanism. When the flange is placed on the receiving plate, the receiving plate moves and compresses the bearing mechanism under the weight of the flange. The bearing mechanism simultaneously sprays gas to clean the flange surface. After the pressure sensor detects the pressure signal, the controller controls the clamping mechanism to fix the flange.

[0005] Preferably, the bearing mechanism includes a cylindrical cavity formed inside the support platform, a sliding column that slides through the top of the cylindrical cavity, and a piston plate fixed to the lower end of the sliding column and slidingly engaged with the inner wall of the cylindrical cavity. A connecting spring is fixed to the lower end of the piston plate, and the other end of the connecting spring is fixedly connected to the bottom of the cylindrical cavity.

[0006] Preferably, the cylindrical cavity is connected to an air inlet pipe and an air outlet pipe, respectively. The end of the air outlet pipe away from the cylindrical cavity is connected to a telescopic pipe, and the end of the telescopic pipe away from the air outlet pipe is connected to a push plate. The push plate is provided with an air jet port.

[0007] Preferably, both the inlet pipe and the outlet pipe are equipped with one-way valves. The one-way valve in the inlet pipe only allows external gas to enter the cylindrical cavity, and the one-way valve in the outlet pipe only allows gas in the cylindrical cavity to flow to the telescopic pipe.

[0008] Preferably, the clamping mechanism includes a fixed support plate fixed to the support platform, an electric push rod installed on the side of the fixed support plate near the support platform, and a push plate connected to the output end of the electric push rod.

[0009] Preferably, a sliding column is fixed to one end of the push plate, the sliding column slides through the fixed support plate, and an anti-slip pad is provided on the side of the push plate near the flange.

[0010] Preferably, the clamping mechanism is evenly arranged in four groups along the circumference of the support platform. The electric push rod in each clamping mechanism is electrically connected to the pressure sensor and the controller. After receiving the pressure sensor signal, the controller controls each electric push rod to move synchronously.

[0011] Preferably, a support frame is fixedly installed on the rotating column, and a cross slide is provided on the support frame.

[0012] Preferably, an electric telescopic rod is connected to the cross slide, and the end of the electric telescopic rod away from the cross slide is connected to the honing equipment.

[0013] Preferably, a sealing ring is provided on the outer peripheral surface of the piston plate, and the sealing ring is in close contact with the inner wall of the cylindrical cavity to enhance the airtightness of the cylindrical cavity.

[0014] Compared with the prior art, the beneficial effects of the present invention are: 1. By setting four sets of synchronously moving clamping mechanisms around the outside of the support platform, combined with the linkage control of pressure sensors and controllers, when the flange is placed, the electric push rod can be automatically triggered to drive the push plate and anti-slip pad to clamp the flange at four points symmetrically. This can automatically achieve efficient and stable fixing of the flange, and the anti-slip pad increases the friction force, effectively avoiding the impact of vibration displacement on the processing accuracy of the flange during honing.

[0015] 2. By incorporating a load-bearing mechanism, the sliding column, piston plate, and connecting spring provide a dual buffer of elasticity and gas damping for flange placement, significantly reducing the impact of heavy flanges on the support platform and preventing deformation or structural loosening of the support platform. Furthermore, the compressed gas as the piston plate moves downward is ejected from the jet nozzle through the exhaust pipe and telescopic pipe, simultaneously cleaning impurities on the flange surface and further ensuring the quality of subsequent honing processes and the service life of the equipment. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0017] Figure 2 This is a schematic diagram of another state of the support frame of the present invention.

[0018] Figure 3 This is a schematic diagram of the receiving plate structure of the present invention.

[0019] Figure 4 This is a schematic diagram of the cylindrical cavity structure of the present invention.

[0020] Figure 5 This is a schematic diagram of the specific structure of the clamping mechanism of the present invention.

[0021] Figure 6 This is a schematic diagram of the anti-slip mat structure of the present invention.

[0022] Figure 7 This is a schematic diagram of the circular groove structure of the present invention.

[0023] Figure 8 This is a schematic diagram of the sliding column structure of the present invention.

[0024] In the diagram: 1. Base plate; 2. Rotating column; 3. Support platform; 4. Receiving plate; 5. Circular groove; 6. Clamping mechanism; 7. Bearing mechanism; 8. Pressure sensor; 9. Support frame; 10. Cross slide; 11. Electric telescopic rod; 12. Honing equipment; 70. Cylindrical cavity; 71. Sliding column; 72. Piston plate; 73. Connecting spring; 74. Air inlet pipe; 75. Air outlet pipe; 76. Telescopic pipe; 77. Air jet nozzle; 61. Fixed support plate; 62. Electric push rod; 63. Sliding long column; 64. Push plate; 65. Anti-slip pad. Detailed Implementation

[0025] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0026] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0027] Please see Figures 1 to 8 The present invention provides a technical solution: a honing device for turbine blade flanges that is easy to fix, including a base plate 1 and a support platform 3 installed on the base plate 1. One side of the top surface of the base plate 1 is rotatably connected to the rotating column 2 through a bearing seat, and the other side of the top surface of the base plate 1 is fixedly installed on the support platform 3 by bolts. The support platform 3 is a cylindrical structure, and its top surface is provided with a circular groove 5 that is adapted to the receiving plate 4.

[0028] like Figure 4 As shown, a cylindrical cavity 70 is provided inside the support platform 3, and a sliding column 71 is slidably inserted inside the cylindrical cavity 70. The top end of the sliding column 71 is fixedly connected to the bottom surface of the receiving plate 4 by welding, and the lower end of the sliding column 71 is welded and fixed to the piston plate 72. An annular groove is provided on the outer circumference of the piston plate 72, and a sealing ring made of nitrile rubber is embedded in the annular groove to ensure the airtightness of the cylindrical cavity 70 when the piston plate 72 slides.

[0029] like Figure 4 As shown, a connecting spring 73 is fixed between the bottom surface of the piston plate 72 and the bottom of the cylindrical cavity 70, which allows the top surface of the receiving plate 4 to be higher than the top surface of the support platform 3 in its natural state. At the same time, multiple air inlet pipes 74 and air outlet pipes 75 are connected to the side wall of the support platform 3. Both the air inlet pipes 74 and the air outlet pipes 75 are made of copper fittings. The air inlet pipe 74 is equipped with a one-way valve that only allows external gas to enter, and the air outlet pipe 75 is equipped with a one-way valve that only allows gas to flow out of the cylindrical cavity 70. The end of the air outlet pipe 75 away from the support platform 3 is connected to the telescopic pipe 76 through a quick connector. The telescopic pipe 76 is a telescopic flat pipe. The push plate 64 is hollow and has an air jet port 77.

[0030] like Figure 2As shown, in the preparation stage before the device starts, an external drive device, such as a servo motor and gear transmission assembly, is used to drive the rotating column 2 to rotate around its mounting axis. Since the honing device 12 is assembled at the end of the rotating column 2 via a connection structure consisting of a support frame 9, a cross slide 10, and an electric telescopic rod 11, the rotation of the rotating column 2 will synchronously drive the honing device 12 to deflect completely until the honing device 12 is completely moved to the side area of ​​the receiving plate 4, providing unobstructed placement space for the turbine blade flange to be honed. The rotation adjustment of the rotating column 2 and the equipment avoidance logic during the process are routine preparatory operations before workpiece processing in the prior art. After the avoidance action is completed, the turbine blade flange to be processed is lifted smoothly with the help of commonly used hoisting equipment in the workshop, such as a bridge crane equipped with a flange-specific hoisting fixture. This hoisting method is a common technology for handling heavy workpieces. The flange of the turbine blade to be processed is lifted smoothly, and the relative position of the flange and the receiving plate 4 is calibrated by a laser positioning device. Finally, the flange is accurately placed on the receiving plate 4 on the top of the support platform 3. The hoisting and initial placement process of the flange does not involve the innovative design of this invention, and all are implemented using mature existing technologies in the field.

[0031] like Figure 5 as well as Figure 6 As shown, four sets of clamping mechanisms 6 are evenly distributed along the circumference of the support platform 3. They are fixed to the support platform 3 by bolts. An electric push rod 62 is fixedly installed on the side of the horizontal section of the fixed support plate 61 near the support platform 3 by bolts. The output shaft axis of the electric push rod 62 is consistent with the radial direction of the support platform 3. The sliding column 63 slides through the guide hole opened in the horizontal section of the fixed support plate 61. A linear bearing is installed in the guide hole to reduce the friction when the sliding column 63 moves. One end of the sliding column 63 is welded and fixed to the push plate 64. The push plate 64 is a steel plate. An anti-slip pad 65 is glued to the side of the push plate 64 near the flange by strong adhesive. The anti-slip pad 65 is made of rubber and has a diamond-shaped anti-slip texture on the surface.

[0032] like Figure 7 As shown, a pressure sensor 8 is fixedly installed at the center of the bottom of the circular groove 5 with screws. The signal output end of the pressure sensor 8 is electrically connected to the controller through a wire. The controller is a PLC programmable logic controller, which is installed in the control box on the support platform 3. The signal output end of the controller is electrically connected to four sets of electric push rods 62 through wires to realize the synchronous control of the electric push rods 62 by the pressure signal.

[0033] like Figure 2 As shown, a support frame 9 is fixedly installed at the top of the rotating column 2 by bolts, and a cross slide 10 is fixedly installed on its crossbeam by bolts. The slider of the cross slide 10 can move along the X-axis and Y-axis. The bottom surface of the slider of the cross slide 10 is connected to the electric telescopic rod 11 through a flange, and its telescopic end is fixed to the honing equipment 12 by bolts.

[0034] In use, the external drive device first drives the rotating column 2 to rotate, and the rotating column 2 drives the honing device 12 to move away from the top of the receiving plate 4, thereby making enough space for the turbine blade flange to be honed. Then, the flange is accurately placed on the receiving plate 4 above the support platform 3 by the lifting device. Under the action of the flange's own weight, the receiving plate 4 gradually moves down and enters the circular groove 5 opened at the top of the support platform 3. At the same time, the receiving plate 4 drives the sliding column 71 in the bearing mechanism 7 to move downward. The sliding column 71 pushes the piston plate 72 to slide downward inside the cylindrical cavity 70. During this process, the connecting spring 73 is compressed, and the sliding of the piston plate 72 in the cylindrical cavity 70 is subject to gas damping. Combined with the elastic buffering effect of the connecting spring 73, the flange moves down slowly in two ways. This can avoid the flange from being damaged by collision due to rapid falling, and also reduce the impact on the receiving plate 4 and the support platform 3, thus extending the service life of the device components. When the piston plate 72 slides downward, it will squeeze the gas in the cylindrical cavity 70 through the gas outlet pipe 75. The squeezed gas is transported to the jet nozzle 77 through the telescopic pipe 76 and finally ejected from the jet nozzle 77. During the downward movement of the flange, the ejected gas can thoroughly and efficiently clean the flange surface, effectively remove the impurities and processing residues on the surface, and prevent the residues from damaging the anti-slip pad 65 and other components during the subsequent clamping process. When the receiving plate 4 is completely moved into the circular groove 5, the pressure sensor 8 at the bottom of the circular groove 5 senses the pressure transmitted by the receiving plate 4. Then, the pressure sensor 8 sends the pressure signal to the controller of the device. The controller controls the electric push rod 62 to extend. The electric push rod 62 pushes the sliding column 63 to drive the push plate 64 to move closer to the flange until the anti-slip pad 65 on the push plate 64 is tightly attached to the side of the flange. By using the anti-slip pad 65 to increase the friction, the flange is firmly fixed on the receiving plate 4, which avoids the flange from being displaced due to vibration during the subsequent honing process and significantly ensures the accuracy of the honing process. After the flange is fixed, the controller controls the external drive device to reset the rotating column 2. At the same time, it controls the cross slide 10 and the electric telescopic rod 11 on the support frame 9 to work together. The position of the honing equipment 12 is adjusted by the cross slide 10, and the height of the honing equipment 12 is adjusted by the electric telescopic rod 11 so that the honing equipment 12 is accurately aligned with the honing part of the flange. Then the honing equipment 12 is started to perform honing on the flange.

[0035] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0036] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A honing device for turbine blade flanges that is easy to fix, comprising a base plate and a support platform mounted on the base plate, characterized in that, Also includes: A rotating column is rotatably mounted on one side of the base plate, and its end is connected to a honing device for honing flanges; A receiving plate is movably mounted on the top of the support platform, and a circular groove adapted to the receiving plate is provided on the support platform. The bearing mechanism is installed inside the support platform and connected to the receiving plate, and is used to enable the receiving plate to drive the flange to move slowly downward; A clamping mechanism is arranged around the outside of the support platform to fix the flange placed on the receiving plate; A pressure sensor is located at the bottom of the circular groove and is electrically connected to the controller in the clamping mechanism to control the movement of the clamping mechanism; When the flange is placed on the receiving plate, the receiving plate moves and compresses the bearing mechanism under the action of the flange's gravity. The bearing mechanism simultaneously sprays gas to clean the flange surface. After the pressure sensor detects the pressure signal, the controller controls the clamping mechanism to fix the flange.

2. The honing device for turbine blade flanges that is easy to fix according to claim 1, characterized in that: The bearing mechanism includes a cylindrical cavity opened inside the support platform, a sliding column that slides through the top of the cylindrical cavity, and a piston plate fixed to the lower end of the sliding column and slidingly engaged with the inner wall of the cylindrical cavity. A connecting spring is fixed to the lower end of the piston plate, and the other end of the connecting spring is fixedly connected to the bottom of the cylindrical cavity.

3. The honing device for turbine blade flanges that is easy to fix according to claim 2, characterized in that: The cylindrical cavity is connected to an air inlet pipe and an air outlet pipe respectively. The end of the air outlet pipe away from the cylindrical cavity is connected to a telescopic pipe. The end of the telescopic pipe away from the air outlet pipe is connected to a push plate. An air jet port is provided on the push plate.

4. The honing device for turbine blade flanges that is easy to fix according to claim 3, characterized in that: Both the inlet and outlet pipes are equipped with one-way valves. The one-way valve in the inlet pipe only allows external gas to enter the cylindrical cavity, while the one-way valve in the outlet pipe only allows gas in the cylindrical cavity to flow to the telescopic pipe.

5. The honing device for turbine blade flanges that is easy to fix according to claim 4, characterized in that: The clamping mechanism includes a fixed support plate fixed on the support platform, an electric push rod installed on the side of the fixed support plate near the support platform, and a push plate connected to the output end of the electric push rod.

6. The honing device for turbine blade flanges that is easy to fix according to claim 5, characterized in that: A sliding column is fixed to one end of the push plate, and the sliding column slides through the fixed support plate. An anti-slip pad is provided on the side of the push plate near the flange.

7. The honing device for turbine blade flanges that is easy to fix according to claim 6, characterized in that: The clamping mechanism is evenly arranged in four groups along the circumference of the support platform. The electric push rod in each clamping mechanism is electrically connected to the pressure sensor and the controller. After receiving the pressure sensor signal, the controller controls each electric push rod to move synchronously.

8. The honing device for turbine blade flanges that is easy to fix according to claim 1, characterized in that: A support frame is fixedly installed on the rotating column, and a cross slide is provided on the support frame.

9. The honing device for turbine blade flanges that is easy to fix according to claim 8, characterized in that: An electric telescopic rod is connected to the cross slide, and the end of the electric telescopic rod away from the cross slide is connected to the honing equipment.

10. A honing device for turbine blade flanges that is easy to fix, as described in claim 2, characterized in that: A sealing ring is provided on the outer circumferential surface of the piston plate, and the sealing ring is tightly fitted to the inner wall of the cylindrical cavity.

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