Quenching and spray quenching equipment for rotor forgings

Abstract

The invention discloses rotor forging quenching and spray quenching equipment and belongs to the technical field of metal material heat treatment auxiliary equipment. The device comprises a device shell, a roller rotating mechanism, a water supply device, an air supply device, a heat removal device and an electrical control system, the roller rotating mechanism is installed in the device shell and comprises a driving assembly and two rows of roller sets arranged in parallel, and the driving assembly comprises a motor and a speed reducer; the motor drives one row of roller sets to serve as driving wheels to rotate through the speed reducer, the two rows of roller sets are connected through the transmission mechanism, a bracket area used for bearing rotor forgings is formed between the two rows of roller sets, a plurality of spraying pipelines are arranged on the outer sides of the two rows of roller sets respectively, and the water supply device is connected with the spraying pipelines through the water supply pipelines. And the air supply device is connected with each injection pipeline through an air supply pipeline. According to the invention, intelligent cooling control can be carried out on different areas of the rotor, and the cooling rate is adjustable, so that the structure uniformity and the performance consistency of the quenched and tempered rotor forge piece are improved.

Description

Technical Field

[0001] This invention belongs to the technical field of auxiliary equipment for heat treatment of metal materials, and specifically relates to a quenching and spraying equipment for rotor forgings. Background Technology

[0002] Large-size shaft rotor forgings are core components of equipment such as steam turbines, motors, and compressors. They operate under high temperature and high pressure environments for extended periods, bearing extremely high working loads, thus requiring very stringent performance specifications. The heat treatment quenching and cooling of rotor forgings is a crucial process involving heating the metal material to a specific temperature and then cooling it in a predetermined manner to obtain the desired microstructure and properties. Different materials require different quenching and cooling methods, generally categorized as water cooling, air cooling, and mist cooling. The quenching and cooling effect directly affects the final quality and performance of the product.

[0003] Existing technologies generally use cooling water tanks or oil tanks to directly quench and cool the rotor. This method has high requirements for the size of the water tank and oil tank and the cooling system. Furthermore, since rotor products are usually structured with thin shaft diameters at both ends and a thick shaft body in the middle, conventional heat treatment methods will lead to differences in the structure and properties of the shaft diameter and shaft body, affecting the overall performance uniformity and service life of the rotor.

[0004] Therefore, it is necessary to design an intelligent quenching and spraying equipment that can control the cooling effect at different positions of the rotor in order to meet the requirement that the material microstructure and properties of the rotor forging tend to be consistent after tempering. Summary of the Invention

[0005] This invention addresses the aforementioned problems and overcomes the shortcomings of existing technologies by providing a quenching and spraying equipment for rotor forgings. This invention enables intelligent cooling control of different regions of the rotor, achieving adjustable cooling rates, thereby improving the uniformity of the microstructure and the consistency of the performance of the rotor forgings after tempering.

[0006] To achieve the above objectives, the present invention adopts the following technical solution.

[0007] This invention provides a rotor forging quenching and spraying equipment, characterized in that it includes an equipment shell, a roller rotation mechanism, a water supply device, an air supply device, a heat dissipation device, and an electrical control system. The roller rotation mechanism is installed inside the equipment shell and includes a drive assembly and two rows of parallel rollers. The drive assembly includes a motor and a reducer. The motor drives one row of rollers as the driving wheel to rotate through the reducer. The two rows of rollers are connected by a transmission mechanism, so that the other row of rollers rotates synchronously as the driven wheel. A bracket area for supporting the rotor forging is formed between the two rows of rollers. Multiple spray pipes are respectively arranged on the outer side of the two rows of rollers. The water supply device is connected to each of the spray pipes through the water supply pipes. The air supply device is connected to each of the spray pipes through the air supply pipes. Each spray pipe has a spray nozzle facing the bracket area. The heat dissipation device is located below the bracket area. The electrical control system is electrically connected to the motor, the water supply device, the air supply device, and the heat dissipation device.

[0008] Furthermore, the equipment housing is welded from rust-resistant stainless steel plates and includes a left outer shell, a right outer shell, and a rear outer shell.

[0009] Furthermore, the transmission mechanism is a belt drive or a chain drive.

[0010] Furthermore, each of the injection pipes has a ring structure, and the injection pipes in each row are arranged along the axial direction of the rotor forging.

[0011] Furthermore, the water supply pipeline and the air supply pipeline are each equipped with an independent control valve.

[0012] Furthermore, the water supply device includes a high-pressure pump and a water storage tank.

[0013] Furthermore, the air supply device includes a fan.

[0014] Furthermore, the heat dissipation device includes a compressor.

[0015] The beneficial effects of the present invention.

[0016] This invention achieves uniform cooling of the rotor forging in both the circumferential and axial directions by synchronously rotating two rows of rollers and combining this with double-sided spray quenching via spray pipes on both sides. This effectively solves the problem of inconsistent microstructure and properties caused by uneven cooling in variable cross-section rotors. The water and air supply systems share the same spray pipes, and the medium ratios in each pipe can be independently adjusted. This allows for convenient implementation of multiple quenching modes, such as water cooling, air cooling, and mist cooling, on the same equipment, meeting the process requirements of different materials. The drive and transmission structure is simple and stable. The split-type housing facilitates manufacturing and maintenance and provides good sealing. The bottom heat dissipation device can promptly remove residual heat from quenching, ensuring the long-term stability and lifespan of the equipment. Attached Figure Description

[0017] To make the technical problems solved, the technical solutions, and the beneficial effects of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

[0018] Figure 1 This is a top view structural diagram of the present invention.

[0019] Figure 2 This is a side view structural diagram of the present invention.

[0020] The markings in the diagram are: 1 for the equipment casing, 2 for the motor, 3 for the reducer, 4 for the roller assembly, 5 for the transmission mechanism, 6 for the injection pipeline, 7 for the heat dissipation device, and 8 for the rotor forging. Detailed Implementation

[0021] As shown in the accompanying drawings, this embodiment provides a rotor forging quenching and spraying equipment, which mainly includes an equipment shell 1, a roller rotation mechanism, a water supply device, an air supply device, a heat dissipation device 7, and an electrical control system.

[0022] The outer casing 1 constitutes the main frame and protective space of the equipment. It is welded from rust-resistant stainless steel plates, providing excellent sealing and corrosion resistance. The outer casing 1 includes a left side casing, a right side casing, and a rear casing. The left and right side casings are located on either side of the equipment, while the rear casing is located at the rear end, together forming a semi-enclosed or fully enclosed working space. This split structure facilitates the manufacturing, transportation, installation, and subsequent maintenance of the equipment, while effectively preventing the splashing of cooling water, mist, and other media during the quenching process, protecting surrounding equipment and the environment.

[0023] The roller rotation mechanism is the core component that supports and drives the rotor forging 8 to rotate at a uniform speed. It includes a drive assembly and two rows of parallel roller groups 4. Each row of roller groups 4 can consist of multiple rollers arranged axially at intervals. The drive assembly consists of a motor 2 and a reducer 3. The output shaft of the motor 2 is connected to the input shaft of the reducer 3, and the output shaft of the reducer 3 is connected to one row of roller groups 4, driving that row of roller groups 4 to rotate as the driving wheel. The two rows of roller groups 4 are connected by a transmission mechanism 5, so that when the driving wheel rotates, the other row of roller groups 4 is driven to rotate synchronously via the transmission mechanism 5. The transmission mechanism 5 can be a belt drive or a chain drive, etc. A support area is formed between the two rows of roller groups 4 to stably support the horizontally placed rotor forging 8. By adjusting the speed of the motor 2 through the electrical control system, the rotor can rotate at a suitable speed of 1-10 r / min, which is the basis for achieving uniform circumferential cooling.

[0024] The water supply device provides adjustable-pressure cooling water and may include a high-pressure pump and a water tank (not shown in the figure). The air supply device provides cooling airflow and may include a fan (not shown in the figure). One of the key improvements of this device is that the water supply device and the air supply device are connected to multiple injection pipes 6. The water supply device is connected to these injection pipes 6 through independent water supply pipes, and the air supply device is connected to these injection pipes 6 through independent air supply pipes. The multiple injection pipes 6 are arranged in two rows and multiple layers, symmetrically arranged on the outside of the two rows of roller groups 4. Each injection pipe 6 has a ring structure, and the injection pipes in each row are arranged along the axial direction of the rotor forging 8. The injection nozzles of each injection pipe 6 face the rotor forging 8 at the center of the bracket area. This double-sided quenching method can cool the rotor forging 8 from both sides simultaneously. Combined with the rotational motion, this makes the cooling coverage more comprehensive and uniform, effectively avoiding uneven cooling or deformation that may be caused by unilateral cooling.

[0025] To achieve precise control of the cooling medium flow rate and mixing ratio, independent control valves (such as electric or manual valves) are preferably installed at the branch points leading to each section of the spray pipe on both the water supply pipe and the air supply pipe. By controlling the opening of these valves, the water volume, air volume, and water-air mixing ratio delivered to each section of the spray pipe can be independently and precisely adjusted. This allows for differentiated quenching of different parts of the rotor axially using water cooling, air cooling, or mist cooling (water and air are mixed and the spray volume is controlled by adjusting the water and air spray ratio), perfectly adapting to the cooling requirements of variable cross-section rotors.

[0026] The heat dissipation device 7 includes a compressor, which is installed at the bottom of the equipment and located below the bracket area. It is mainly used to continuously extract and discharge the high-temperature and high-humidity air generated inside the equipment during the quenching process, thereby maintaining a stable working environment inside the cavity.

[0027] The electrical control system, serving as the equipment's control center, preferably employs a PLC (Programmable Logic Controller). It connects to all actuators, including motor 2, water supply device, air supply device, control valves on the water and air supply pipelines, and heat dissipation device 7, via control circuits. Operators can input workpiece parameters and process curves through a human-machine interface, and the control system can automatically execute the program, coordinating the control of rotor rotation, the spray pattern and intensity of cooling media in each zone, and the operation of the heat dissipation device, achieving full automation and intelligence throughout the process.

[0028] The working principle is as follows: The rotor forging 8, which has undergone quenching heat treatment and heating and holding, is placed horizontally in the bracket area of ​​the roller rotating mechanism. The spray quenching process program is set through the electrical control system. Upon starting the equipment, the rotor begins to rotate at a uniform speed. According to the program instructions, the control system drives the water supply and air supply devices, and by adjusting the control valves on the corresponding pipelines, a preset proportion of cooling medium is sprayed onto a specific axial section of the rotor through multiple spray pipes 6 located on both sides for double-sided quenching. Simultaneously, the heat dissipation device is activated to maintain the internal environment. After the process is completed, the equipment automatically stops, and the workpiece is unloaded, thus completing the spray quenching process.

[0029] Through the integrated design of multiple injection pipes 6 arranged on both sides, and with the control valves set on the water supply and air supply branch pipes respectively, flexible supply, precise proportioning and independent zone control of water and air media from both sides of the rotor are realized, which greatly improves the uniformity and controllability of cooling. Combined with a stable rotation drive and intelligent control system, the technical problem of poor quenching uniformity of large variable cross-section rotor forgings 8 is effectively solved.

[0030] It is understood that the above specific description of the present invention is only for illustrating the present invention and is not limited to the technical solutions described in the embodiments of the present invention. Those skilled in the art should understand that modifications or equivalent substitutions can still be made to the present invention to achieve the same technical effect; as long as the use needs are met, they are all within the protection scope of the present invention.

Claims

1. A quenching and spraying equipment for rotor forgings, characterized in that, The device includes a housing (1), a roller rotating mechanism, a water supply device, an air supply device, a heat dissipation device (7), and an electrical control system. The roller rotating mechanism is installed inside the housing (1). The roller rotating mechanism includes a drive assembly and two rows of parallel roller groups (4). The drive assembly includes a motor (2) and a reducer (3). The motor (2) drives one row of roller groups (4) to rotate as the driving wheel through the reducer (3). The two rows of roller groups (4) are connected by a transmission mechanism (5), so that the other row of roller groups (4) rotates synchronously as the driven wheel. The roller assembly (4) forms a bracket area for supporting the rotor forging (8). Multiple injection pipes (6) are respectively provided on the outer side of the two rows of roller assemblies (4). The water supply device is connected to each of the injection pipes (6) through the water supply pipe. The air supply device is connected to each of the injection pipes (6) through the air supply pipe. Each injection pipe (6) is provided with an injection port facing the bracket area. The heat dissipation device (7) is located below the bracket area. The electrical control system is electrically connected to the motor (2), the water supply device, the air supply device and the heat dissipation device (7).

2. The rotor forging quenching and spraying equipment according to claim 1, characterized in that, The equipment housing (1) is welded from rust-proof stainless steel plates and includes a left housing, a right housing and a rear housing.

3. The rotor forging quenching and spraying equipment according to claim 1, characterized in that, The transmission mechanism (5) is a belt drive or a chain drive.

4. The rotor forging quenching and spraying equipment according to claim 1, characterized in that, Each of the injection pipes (6) is a ring structure, and each row of injection pipes (6) is arranged along the axial direction of the rotor forging (8).

5. The rotor forging quenching and spraying equipment according to claim 1, characterized in that, The water supply pipeline and the air supply pipeline are each equipped with an independent control valve.

6. The rotor forging quenching and spraying equipment according to claim 1, characterized in that, The water supply device includes a high-pressure pump and a water storage tank.

7. The rotor forging quenching and spraying equipment according to claim 1, characterized in that, The air supply device includes a fan.

8. The rotor forging quenching and spraying equipment according to claim 1, characterized in that, The heat dissipation device (7) includes a compressor.

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