Clamping device for turbine blade root machining

Abstract

This utility model relates to the field of turbine blade processing technology, and in particular to a clamping device for turbine blade root processing, comprising a clamping base, a clamping seat, a pressure applying mechanism, a support mechanism, and a guide ring. The clamping seat is installed on the top of the clamping base, the pressure applying mechanism is installed on the outside of the clamping base, the support mechanism is fixedly installed on the back of the clamping base, and the guide ring is fixedly installed on both sides of the clamping base. The pressure applying mechanism includes a hydraulic cylinder, a pressure frame, a pressure plate, and a pressure rod. The pressure frame is fixedly installed at the telescopic end of the hydraulic cylinder. This clamping device for turbine blade root processing facilitates the suspension and installation of blades, and limits the blade position through the support mechanism and the pressure applying mechanism to ensure the positioning and fixation of the blade root, thereby facilitating blade root processing. The support block, pressure plate, and clamping seat can be replaced according to the blade shape to adapt to different blade processing needs.

Description

Technical Field

[0001] This utility model relates to the field of turbine blade processing technology, and in particular to a clamping device for processing turbine blade roots. Background Technology

[0002] A steam turbine, also known as a steam engine, is a rotary steam power unit. High-temperature, high-pressure steam passes through a fixed nozzle, becomes an accelerated airflow, and is then injected onto blades, causing a rotor equipped with rows of blades to rotate and perform work. Steam turbines are the main equipment in modern thermal power plants and are also used in the metallurgical industry, chemical industry, and ship propulsion systems.

[0003] Turbine blades are connected to the hub via their blade roots. The hub surface has blade root grooves that mate with the blade roots to fix the blades and transfer loads. Therefore, the blade roots need to be machined to facilitate insertion into the blade root grooves on the hub surface. Since the blade root is small and the blade is curved, clamping is difficult. Excessive compression by ordinary clamps can easily cause blade deformation. Therefore, a clamping device is needed to fix the blades and facilitate blade root machining. Utility Model Content

[0004] This utility model addresses the deficiencies in the prior art by providing a clamping device for machining the blade root of a steam turbine.

[0005] This utility model is achieved through the following technical solution: A clamping device for machining the root of a steam turbine blade includes a clamping base, a clamping seat, a pressure applying mechanism, a support mechanism, and a guide ring. The clamping seat is installed on the top of the clamping base, the pressure applying mechanism is installed on the outside of the clamping base, the support mechanism is fixedly installed on the back of the clamping base, and the guide ring is fixedly installed on both sides of the clamping base. The pressure applying mechanism includes a hydraulic cylinder, a pressure applying frame, a pressure plate, and a pressure applying rod. The pressure applying frame is fixedly installed at the telescopic end of the hydraulic cylinder, the pressure plate is clamped on the top inner side of the pressure applying frame, and the pressure applying rod is fixedly installed on the inner side of the pressure plate.

[0006] In a preferred embodiment of the present invention, the support mechanism includes a support frame, a support bar, and a support block. The support frame is fixed to the top of the back of the clamping seat, the support bar is fixedly disposed on the inner side of the support frame, and the support block is fixedly disposed on the inner side of the support bar. The support mechanism mainly supports one side of the blade to prevent the blade from tilting under pressure when pressure is applied, which would affect the clamping effect and the processing effect of the blade root.

[0007] In a preferred embodiment of this utility model, a retaining strip is provided on the outer side of the top of the pressure frame, the retaining strip on the outer side of the top of the pressure frame is engaged in the guide ring, and the inner side of the retaining strip is in contact with the outer side of the clamping seat; The locking strip is inserted into the guide ring, which guides and supports the movement of the pressure frame, ensuring the pressing position of the pressure rod.

[0008] In a preferred embodiment of the present invention, a slot for cooperating with a pressure plate is provided on the top inner side of the pressure frame, and a limit insert is provided at the end of the pressure plate; The pressure plate is removed during blade installation to facilitate blade installation and removal. The slot facilitates the installation and positioning of the pressure plate, allowing the pressure rod to be pressed into the designated position.

[0009] In a preferred embodiment of the present invention, the top of the clamping seat is provided with a mounting slot that mates with the card seat, and the top of the card seat, one end of the support block and the end of the pressure rod are provided with slots that mate with the turbine blades.

[0010] The beneficial effects of this utility model are: This clamping device for turbine blade root processing facilitates the suspension and installation of blades, and limits the blades through the support mechanism and the pressure mechanism to ensure the positioning and fixation of the blade roots, so as to facilitate the blade root processing work. The support block, pressure plate and clamp can be replaced according to the blade shape to adapt to different blade processing needs. Attached Figure Description

[0011] Figure 1 This is a three-dimensional structural diagram of the clamping device for machining turbine blade roots according to the present invention. Figure 2 This is a schematic diagram of the pressure application mechanism installation structure of the clamping device for machining turbine blade roots according to this utility model. Figure 3 This is a schematic diagram of the support mechanism of the clamping device for machining the blade root of the turbine blade according to this utility model.

[0012] In the diagram: 1. Clamping seat; 2. Card holder; 3. Pressure applying mechanism; 31. Hydraulic cylinder; 32. Pressure applying frame; 33. Pressure plate; 34. Pressure applying rod; 4. Support mechanism; 41. Support frame; 42. Support bar; 43. Support block; 5. Guide ring. Detailed Implementation

[0013] The preferred embodiments of this utility model will now be described in detail with reference to the accompanying drawings, so that the advantages and features of this utility model can be more easily understood by those skilled in the art, thereby providing a clearer and more definite definition of the scope of protection of this utility model. The directional terms mentioned in this utility model, such as "up," "down," "front," "back," "left," "right," "top," and "bottom," are only for reference to the accompanying drawings. Therefore, the directional terms used are for the purpose of explaining and understanding this utility model, and not for limiting this utility model.

[0014] like Figure 1-3The device shown is a clamping device for machining the root of a steam turbine blade, including a clamping base 1, a clamping seat 2, a pressure applying mechanism 3, a support mechanism 4, and a guide ring 5. The clamping seat 2 is installed on the top of the clamping base 1, the pressure applying mechanism 3 is installed on the outside of the clamping base 1, the support mechanism 4 is fixedly installed on the back of the clamping base 1, and the guide ring 5 is fixedly installed on both sides of the clamping base 1. The pressure applying mechanism 3 includes a hydraulic cylinder 31, a pressure applying frame 32, a pressure plate 33, and a pressure applying rod 34. The pressure applying frame 32 is fixedly installed at the telescopic end of the hydraulic cylinder 31, the pressure plate 33 is clamped on the top of the inner side of the pressure applying frame 32, and the pressure applying rod 34 is fixedly installed on the inner side of the pressure plate 33.

[0015] Specifically, the support mechanism 4 includes a support frame 41, a support bar 42, and a support block 43. The support frame 41 is fixed to the top back of the clamping seat 1. The support bar 42 is fixedly installed inside the support frame 41. The support block 43 is fixedly installed inside the support bar 42. A retaining strip is provided on the outer side of the top of the pressure frame 32. The retaining strip on the outer side of the top of the pressure frame 32 is engaged in the guide ring 5. The inner side of the retaining strip is in contact with the outer side of the clamping seat 1. A slot is provided on the top of the inner side of the pressure frame 32 to cooperate with the pressure plate 33. A limit insert is provided at the end of the pressure plate 33. An installation slot is provided on the top of the clamping seat 1 to cooperate with the retaining seat 2. Slots are provided on the top of the retaining seat 2, one end of the support block 43, and the end of the pressure rod 34 to cooperate with the turbine blades.

[0016] In this embodiment, firstly, a suitable card holder 2 is selected according to the usage requirements. The card holder 2 is fixed to the top of the clamping seat 1 by screws. The support block 43 and the matching pressure plate 33 are selected according to the blade. The support block 43 is fixed to the inner side of the support bar 42 by screws. The length of the pressure rod 34 and the end slot on the inner side of the pressure plate 33 are adapted to the edge of the blade. Then, the blade is inserted into the top slot of the card holder 2 and the bottom of the blade root is inserted into the positioning slot at the top of the slot. At this time, one end of the blade will be inserted into the corresponding slot on the inner side of the support block 43.

[0017] Furthermore, the pressure plate 33 is installed, and the limiting inserts at both ends of the pressure plate 33 are engaged in the top slot of one end of the pressure frame 32. Then, the control cylinder 31 is retracted. At this time, the outer side of the top of the pressure frame 32 moves backward under the guidance of the guide ring 5, so that the slot at the end of the pressure rod 34 is engaged in the edge of one side of the blade, thereby achieving the limiting clamping of the blade. The blade is clamped by the top suspension positioning and the bottom positioning clamping method, which facilitates the blade root processing work.

[0018] It should be noted that the parts not covered in this utility model are the same as or can be implemented using existing technology; the various drives in this utility model can be implemented by corresponding power structures such as cylinders, oil cylinders, electric cylinders, and motors in conjunction with connecting rods, guide rods, etc., and are not limited to the structures described in the specification and the drawings.

[0019] In the description of the embodiments of this utility model, unless otherwise expressly specified and limited, the terms "installed," "connected," "linked," "set up," "equipped with," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0020] The embodiments described above are merely examples of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these modifications and improvements all fall within the protection scope of this utility model.

Claims

1. A clamping device for machining the root of a steam turbine blade, comprising a clamping base (1), a clamping seat (2), a pressure applying mechanism (3), a support mechanism (4), and a guide ring (5), characterized in that: The card holder (2) is installed on the top of the clamping seat (1), the pressure applying mechanism (3) is installed on the outside of the clamping seat (1), the support mechanism (4) is fixedly installed on the back of the clamping seat (1), and the guide ring (5) is fixedly installed on both sides of the clamping seat (1). The pressure applying mechanism (3) includes a hydraulic cylinder (31), a pressure frame (32), a pressure plate (33), and a pressure rod (34). The pressure frame (32) is fixedly installed at the telescopic end of the hydraulic cylinder (31), the pressure plate (33) is clamped on the top of the inner side of the pressure frame (32), and the pressure rod (34) is fixedly installed on the inner side of the pressure plate (33).

2. The clamping device for machining turbine blade roots according to claim 1, characterized in that: The support mechanism (4) includes a support frame (41), a support bar (42) and a support block (43). The support frame (41) is fixed to the top of the back of the clamping seat (1). The support bar (42) is fixedly installed inside the support frame (41). The support block (43) is fixedly installed inside the support bar (42).

3. The clamping device for machining turbine blade roots according to claim 1, characterized in that: The pressure frame (32) has a locking strip on the top outer side. The locking strip on the top outer side of the pressure frame (32) is locked inside the guide ring (5), and the inner side of the locking strip is in contact with the outer side of the clamping seat (1).

4. The clamping device for machining turbine blade roots according to claim 1, characterized in that: The pressure frame (32) has a slot on the top inner side that mates with the pressure plate (33), and the pressure plate (33) has a limit insert at its end.

5. The clamping device for machining turbine blade roots according to claim 2, characterized in that: The top of the clamping seat (1) is provided with an installation slot that mates with the card seat (2), and the top of the card seat (2), one end of the support block (43) and the end of the pressure rod (34) are provided with slots that mate with the turbine blades.

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