Accurate heating device for heat treatment of steam turbine blades

Abstract

The utility model relates to the technical field of accurate heating, and discloses an accurate heating device for steam turbine blade heat treatment, which comprises a bottom plate, a rotary positioning mechanism is arranged on the right side of the top of the bottom plate, a clamping positioning mechanism is arranged on the left side of the rotary positioning mechanism, and two guide rails are arranged on the top of the bottom plate. A connecting frame is slidably connected to the tops of the two guide rails, a quick release mechanism is arranged at the top of the connecting frame, and an infrared heater is mounted at the bottom of the quick release mechanism; the clamping and positioning mechanism comprises an air cylinder, the output end of the air cylinder is fixedly connected with a push rod, the outer portion of the push rod is slidably connected with a fixing frame, and the left side of the push rod is fixedly connected with a connecting frame. According to the utility model, the angle adjustment of the clamping part of the blade is realized, different parts of the blade can be accurately heated as required, the requirement of accurate heating of the blade is met from multiple angles and multiple positions, and the quality and the efficiency of heat treatment are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the precision heating device for steam turbine blade heat treatment field especially relates to a precision heating device for steam turbine blade heat treatment. BACKGROUND

[0002] Steam turbine is the core power equipment in modern thermal power plant, metallurgical industry, chemical industry and marine power device. Steam turbine is a kind of rotary power machinery that converts the energy of steam into mechanical energy, it is mainly composed of static part and rotating part. The static part includes cylinder, nozzle, partition plate etc., they provide space and guiding effect for the flow and energy conversion of steam. The rotating part is mainly rotor, and the blade is installed on the rotor, and the blade is the key component of energy conversion. Its working principle is that steam with certain pressure and temperature is accelerated through nozzle, forms high-speed airflow, then impacts the blade on the rotor, makes the rotor rotate. It is like wind blowing windmill, but here steam pushes the blade, steam turbine is widely used in industrial field, in thermal power plant, it is the core equipment of generator set, uses steam generated by fuel combustion to drive generator to generate electricity, provides a large amount of electric power for society. At the same time, in some large ships, steam turbine is also used to push propeller, provides the power required for ship navigation.

[0003] The strength and toughness of the blade can be enhanced by heat treatment. The blade will bear huge centrifugal force, steam impact force and alternating stress caused by vibration during high-speed rotation. Through quenching and tempering and other heat treatment processes, the grain structure of the blade material can be refined, the strength of the blade can be significantly improved, and the brittle fracture of the blade under complex stress can be effectively avoided, so that the toughness of the blade can withstand various working conditions. Heat treatment helps to improve the corrosion resistance of the blade. In the process of steam turbine operation, the blade is in long-term contact with high-temperature steam, and the steam may contain impurities and other corrosive components. After proper heat treatment, a dense oxide film can be formed on the surface of the blade. The oxide film can isolate steam and blade matrix material, effectively slow down the corrosion rate and prolong the service life of the blade.

[0004] But the existing part of the steam turbine blade in the heat treatment process, the blade can not be precise heating, can not uniformly heat to the various parts of the blade; Or temperature control system is not accurate, it is difficult to accurately maintain the set heating temperature range, resulting in the distribution of heat in the heating process, partial area may be overheated and other areas are not heated enough, so as to realize the precise heating of the blade, it will not only affect the quality of the blade heat treatment, so that its internal structure to the ideal state, thereby reducing the blade strength, toughness and other key performance indicators, will lead to blade in the subsequent use process more prone to wear, corrosion and even fracture and other serious problems, greatly shorten the service life of the steam turbine blade, increase the safety risk and maintenance cost of steam turbine operation. Therefore, in view of the above shortcomings, a precise heating device for steam turbine blade heat treatment is proposed to solve the above problems. Practical new type content

[0005] In order to make up for the above shortcomings, the utility model provides a kind of precise heating device for steam turbine blade heat treatment, to improve the problem that part of steam turbine blade heat treatment cannot be precisely heated in prior art.

[0006] In order to achieve the above purpose, the utility model adopts the following technical scheme:

[0007] A kind of precise heating device for steam turbine blade heat treatment, including bottom plate, the top right side of the bottom plate is provided with rotary positioning mechanism, the left side of the rotary positioning mechanism is provided with clamping positioning mechanism, the top of the bottom plate is equipped with two guide rails, the top of two The guide rails are slidably connected with connecting frame, the top of the connecting frame is provided with quick release mechanism, and the bottom of the quick release mechanism is provided with infrared heater;

[0008] The clamping positioning mechanism includes cylinder, the output end of the cylinder is fixedly connected with push rod, the outer portion of the push rod is slidably connected with fixed frame, the left side of the push rod is fixedly connected with connecting frame, the right side of the connecting frame is fixedly connected with two positioning rods, the front and rear sides of the connecting frame are both fixedly connected with fixed shaft, the outer portion of two The fixed shaft is rotatably connected with rotating plate, the inner portion of two The rotating plate is rotatably connected with rotating shaft, the top of two The rotating plate is fixedly connected with clamping block, the left side of two The clamping block is fixedly connected with fixed pad, and the left side of the fixed frame is fixedly connected with support plate;

[0009] As a further description of the above technical scheme:

[0010] The rotating positioning mechanism comprises a fixed plate, the bottom of the fixed plate is fixedly connected to the top right side of the bottom plate, two guide grooves are formed in the inside of the bottom plate, a limiting groove is formed in the inside of the fixed plate, a plurality of limiting frames are slidably connected in the inside of the limiting groove, a mounting disc is fixedly connected to the left side of the plurality of limiting frames, a motor is mounted on the right side of the fixed plate, a driving shaft is fixedly connected to the output end of the motor, and two guide rods are fixedly connected to the right side of the fixed frame;

[0011] As a further description of the above technical solution:

[0012] The quick release mechanism comprises a mounting frame, the bottom of the mounting frame is fixedly connected to the top of the connecting frame, two sliding rods are slidably connected in the inside of the mounting frame, springs are sleeved on the bottom of the two sliding rods, fixed rings are fixedly connected to the outside of the two sliding rods, a pull plate is fixedly connected to the top of the two sliding rods, a sliding groove is formed in the inside of the connecting frame, a sliding plate is slidably connected in the inside of the sliding groove, and a connecting rod is fixedly connected to the bottom of the sliding plate.

[0013] As a further description of the above technical solution:

[0014] The outside of the guide rod is slidably connected in the inside of the guide groove, and the right side of the air cylinder is mounted on the left side of the mounting disc.

[0015] As a further description of the above technical solution:

[0016] The outside of the rotating shaft is fixedly connected in the inside of the fixed frame, and the outside of the rotating plate is slidably connected in the inside of the fixed frame.

[0017] As a further description of the above technical solution:

[0018] The outside of the positioning rod is slidably connected in the inside of the fixed frame, and the outside of the limiting frame is rotatably connected in the inside of the fixed plate.

[0019] As a further description of the above technical solution:

[0020] One end of the spring is fixedly connected to the bottom of the mounting frame, and the other end of the spring is fixedly connected to the top of the fixed ring.

[0021] As a further description of the above technical solution:

[0022] The outside of the sliding rod is slidably connected in the inside of the sliding plate, and the outside of the connecting rod is slidably connected in the inside of the connecting frame.

[0023] The utility model has the advantages of the following:

[0024] 1. In the utility model, through the cylinder drive push rod in clamping positioning mechanism, drive connecting frame and the component such as positioning rod, fixed shaft connected with it movement, make rotating plate rotate around rotating shaft, further make clamping block and fixed pad do circular motion around rotating shaft, can blade stably clamped on support plate, with the help motor drive shaft rotation, make mounting disc rotate in limiting slot through limiting frame, further drive fixed frame and support plate rotate, simultaneous guiding rod slide in guiding groove, realized to blade clamping site angle adjustment, can according to demand to blade different parts carry out accurate heating, the cooperation of guide rail and connecting frame, can make the infrared heater of connecting frame top move in horizontal direction, accurate adjustment heating position, both synergies, from multiple angles multiple position satisfied to blade accurate heating requirement, improved heat treatment quality and efficiency.

[0025] 2. In the utility model, when need to disassemble, pull the pull plate to make the sliding rod separate from the sliding plate, rotate the infrared heater to make the sliding plate and the sliding groove align after can be taken out. This quick installation and disassembly structure, facilitates the maintenance, replacement and debugging of the infrared heater, when the infrared heater fails or needs to be replaced with different specifications of infrared heater according to different blade heating requirements, can greatly shorten the downtime, improve the overall utilization of production equipment, reduce maintenance cost and time cost, ensure the continuity and efficiency of steam turbine blade heat treatment process. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 A kind of steam turbine blade heat treatment's accurate heating device for the utility model is proposed as a perspective view;

[0027] Figure 2 The connecting frame structure diagram of a kind of steam turbine blade heat treatment's accurate heating device for the utility model is shown;

[0028] Figure 3 The fixed frame structure diagram of a kind of steam turbine blade heat treatment's accurate heating device for the utility model is shown;

[0029] Figure 4 The connecting rod structure diagram of a kind of steam turbine blade heat treatment's accurate heating device for the utility model is shown;

[0030] Figure 5 The sliding plate structure diagram of a kind of steam turbine blade heat treatment's accurate heating device for the utility model is shown.

[0031] LEGEND:

[0032] 1, bottom plate; 2, fixed plate; 3, guide groove; 4, limiting groove; 5, limiting frame; 6, mounting disc; 7, motor; 8, drive shaft; 9, air cylinder; 10, push rod; 11, fixed frame; 12, guide rod; 13, connecting frame; 14, positioning rod; 15, fixed shaft; 16, rotating plate; 17, rotating shaft; 18, clamping block; 19, fixed pad; 20, support plate; 21, guide rail; 22, connecting frame; 23, mounting frame; 24, sliding rod; 25, spring; 26, fixed ring; 27, pull plate; 28, sliding groove; 29, sliding plate; 30, connecting rod; 31, infrared heater. DETAILED DESCRIPTION

[0033] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0034] Reference Figures 1 to 3 An embodiment provided by the utility model: a precise heating device for steam turbine blade heat treatment, comprising a bottom plate 1, the bottom plate 1 is the basic support structure of the whole device, and provides a stable platform for the installation and operation of other components. The right side of the top of the bottom plate 1 is provided with a rotary positioning mechanism, the left side of the rotary positioning mechanism is provided with a clamping positioning mechanism, the top of the bottom plate 1 is provided with two guide rails 21, the top of the two guide rails 21 is slidably connected with a connecting frame 22, the top of the connecting frame 22 is provided with a quick release mechanism, the bottom of the quick release mechanism is provided with an infrared heater 31, and the infrared heater 31 is a key component for heating the steam turbine blade. Its working principle is to convert electric energy or other energy into heat energy by using infrared radiation, and then radiate to the blade surface in the form of infrared rays, so that the blade is heated and warmed. The clamping positioning mechanism comprises an air cylinder 9, the right side of the air cylinder 9 is installed on the left side of the mounting disc 6, the output end of the air cylinder 9 is fixedly connected with a push rod 10, the outside of the push rod 10 is slidably connected with a fixed frame 11, the left side of the push rod 10 is fixedly connected with a connecting frame 13, and the connecting frame 13 is driven to move by the push rod 10, so that the clamping block 18 clamps the blade.

[0035] The right side of the connecting frame 13 is fixedly connected with two positioning rods 14, the outer part of the positioning rod 14 is slidably connected in the inner part of the fixed frame 11, the front and back sides of the connecting frame 13 are fixedly connected with fixed shafts 15, the outer part of the two fixed shafts 15 is rotatably connected with rotating plates 16, the outer part of the rotating plate 16 is slidably connected in the inner part of the fixed frame 11, the inner part of the two rotating plates 16 is rotatably connected with rotating shafts 17, the rotating shaft 17 guarantees the stability of the axis of the rotating plate 16 when rotating. The outer part of the rotating shaft 17 is fixedly connected in the inner part of the fixed frame 11, the top of the two rotating plates 16 is fixedly connected with clamping blocks 18, the left side of the two clamping blocks 18 is fixedly connected with fixed pads 19, the fixed pad 19 is mainly to increase the contact area and friction with the blade, and improve the stability of clamping. The left side of the fixed frame 11 is fixedly connected with a support plate 20, and the support plate 20 is used to support the blade.

[0036] With reference to Figures 1 to 3 , the rotating positioning mechanism comprises a fixed plate 2, the bottom of the fixed plate 2 is fixedly connected to the top right side of the bottom plate 1, the inner part of the bottom plate 1 is provided with two guide grooves 3, the guide grooves 3 provide sliding tracks for the guide rods 12. The inner part of the fixed plate 2 is provided with a limiting groove 4, and a plurality of limiting frames 5 are slidably connected in the limiting groove 4. The limiting groove 4 is provided in the inner part of the fixed plate 2 for accommodating the limiting frame 5 and limiting the movement track thereof. The outer part of the limiting frame 5 is rotatably connected in the inner part of the fixed plate 2, and the left side of the plurality of limiting frames 5 is fixedly connected with a mounting disc 6. During the operation of the device, the mounting disc 6 can stably drive the clamping and positioning mechanism to rotate. The right side of the fixed plate 2 is provided with a motor 7, the output end of the motor 7 is fixedly connected with a driving shaft 8, and the driving shaft 8 needs to stably transmit the power of the motor 7 to the mounting disc 6. The right side of the fixed frame 11 is fixedly connected with two guide rods 12, the outer part of the guide rod 12 is slidably connected in the inner part of the guide groove 3.

[0037] With reference to Figure 1 , Figure 4 and Figure 5The quick release mechanism comprises a mounting frame 23 fixedly connected at the top of the connecting frame 22, two sliding rods 24 slidably connected in the mounting frame 23, a pull plate 27 connected to the sliding rods 24, a spring 25 fixedly connected at the bottom of the mounting frame 23 and at the top of the fixing ring 26, and a fixing ring 26 fixedly connected to the outside of the sliding rods 24. The spring 25 provides a force to keep the sliding rods 24 in a fixed state. The sliding rods 24 are slidably connected to the inside of the sliding plate 29, and the sliding plate 29 is slidably connected in the sliding groove 28. The sliding rods 24 are slidably connected to the inside of the sliding plate 29, and the sliding plate 29 is fixedly connected to the connecting rod 30. The connecting rod 30 is slidably connected to the inside of the connecting frame 22.

[0038] Working principle: when using the precise heating device for steam turbine blade heat treatment, first start the air cylinder 9, control the displacement of the push rod 10 and the connecting frame 13 through the air cylinder 9, then the positioning rod 14 slides in the fixed frame 11, and the fixed shaft 15 is displaced, the rotating plate 16 rotates around the rotating shaft 17, and the clamping block 18 and the fixed pad 19 rotate around the rotating shaft 17, the blade is placed on the top of the support plate 20, then the clamping block 18 and the fixed pad 19 are used to effectively fix the blade, then the guide rail 21 is started to displace the connecting frame 22, and then the infrared heater 31 is moved above the blade, then the infrared heater 31 is used to heat the blade, when precise heating is needed, the position can be adjusted by the displacement of the connecting frame 22, and the motor 7 is started to drive the mounting disc 6 to rotate, then the limiting frame 5 rotates in the limiting groove 4, the fixed frame 11 and the support plate 20 are rotated, the guide rod 12 rotates in the guide groove 3, and then the precise heating of different parts is realized according to the adjustment of the angle.

[0039] When the infrared heater 31 needs to be disassembled, first, the pull plate 27 can be pulled to drive the sliding rod 24 to displace, and then the fixed ring 26 can displace and the spring 25 can compress, at this time, the sliding rod 24 can be separated from the inside of the sliding plate 29, then the infrared heater 31 can be rotated to align the sliding plate 29 with the sliding groove 28, at this time, the sliding plate 29 can be taken out from the inside of the connecting frame 22, so that the disassembly of the infrared heater 31 can be realized, when the installation is needed, the above steps can be operated in reverse to realize the installation of the infrared heater 31.

[0040] Finally, it should be noted that: the above only for the preferred embodiments of the present application, and not for limiting the present application, although the foregoing embodiments of the present application are described in detail, for those skilled in the art, it still can be modified, or part of the technical features of the equivalent replacement, within the spirit and principles of the present application, any modification, equivalent replacement, improvement, etc., should be included in the scope of protection of the present application.

Claims

1. A precision heating device for heat treatment of steam turbine blades, comprising a base plate (1), characterised in that: The top right side of the bottom plate (1) is provided with a rotating positioning mechanism, the left side of the rotating positioning mechanism is provided with a clamping positioning mechanism, the top of the bottom plate (1) is provided with two guide rails (21), the top of the two guide rails (21) is slidably connected with a connecting frame (22), the top of the connecting frame (22) is provided with a quick release mechanism, and the bottom of the quick release mechanism is provided with an infrared heater (31); The clamping positioning mechanism comprises a gas cylinder (9), the output end of the gas cylinder (9) is fixedly connected with a push rod (10), the outer portion of the push rod (10) is slidably connected with a fixed frame (11), the left side of the push rod (10) is fixedly connected with a connecting frame (13), the right side of the connecting frame (13) is fixedly connected with two positioning rods (14), the front and rear sides of the connecting frame (13) are both fixedly connected with a fixed shaft (15), the outer portion of the two fixed shafts (15) is both rotatably connected with a rotating plate (16), the inner portion of the two rotating plates (16) is both rotatably connected with a rotating shaft (17), the top of the two rotating plates (16) is both fixedly connected with a clamping block (18), the left side of the two clamping blocks (18) is both fixedly connected with a fixed pad (19), and the left side of the fixed frame (11) is fixedly connected with a supporting plate (20).

2. A precision heating device for heat treatment of a turbine blade according to claim 1, characterized in that: The rotating positioning mechanism comprises a fixed plate (2), the bottom of the fixed plate (2) is fixedly connected to the top right side of the bottom plate (1), the inner portion of the bottom plate (1) is provided with two guide grooves (3), the inner portion of the fixed plate (2) is provided with a limiting groove (4), the inner portion of the limiting groove (4) is slidably connected with a plurality of limiting frames (5), the left side of the plurality of limiting frames (5) is fixedly connected with a mounting disc (6), the right side of the fixed plate (2) is provided with a motor (7), the output end of the motor (7) is fixedly connected with a driving shaft (8), and the right side of the fixed frame (11) is fixedly connected with two guide rods (12).

3. A precision heating device for heat treatment of a turbine blade according to claim 1, characterized in that: The quick release mechanism comprises a mounting frame (23), the bottom of the mounting frame (23) is fixedly connected to the top of the connecting frame (22), the inner portion of the mounting frame (23) is slidably connected with two sliding rods (24), the bottom of the two sliding rods (24) is both sleeved with a spring (25), the outer portion of the two sliding rods (24) is both fixedly connected with a fixed ring (26), the top of the two sliding rods (24) is fixedly connected with a pull plate (27), the inner portion of the connecting frame (22) is provided with a sliding groove (28), the inner portion of the sliding groove (28) is slidably connected with a sliding plate (29), and the bottom of the sliding plate (29) is fixedly connected with a connecting rod (30).

4. A precision heating device for heat treatment of a turbine blade according to claim 2, characterized in that: The outer portion of the guide rod (12) is slidably connected in the inner portion of the guide groove (3), and the right side of the gas cylinder (9) is mounted on the left side of the mounting disc (6).

5. A precision heating device for heat treatment of a turbine blade according to claim 1, characterized in that: The outer portion of the rotating shaft (17) is fixedly connected in the inner portion of the fixed frame (11), and the outer portion of the rotating plate (16) is slidably connected in the inner portion of the fixed frame (11).

6. A precision heating device for heat treatment of a turbine blade according to claim 2, characterized in that: The positioning rod (14) is externally and slidably connected in the fixed frame (11), and the limiting frame (5) is externally and rotatably connected in the fixed plate (2).

7. A precision heating device for heat treatment of a turbine blade according to claim 3, characterized in that: One end of the spring (25) is fixedly connected to the bottom of the mounting frame (23), and the other end of the spring (25) is fixedly connected to the top of the fixed ring (26).

8. A precision heating device for heat treatment of a turbine blade according to claim 3, characterized in that: The sliding rod (24) is externally and slidably connected in the sliding plate (29), and the connecting rod (30) is externally and slidably connected in the connecting frame (22).

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