Gas-flow-adjustable centripetal turbine for ORC (organic Rankine cycle) system

Abstract

The utility model discloses a gas-flow-adjustable centripetal turbine for an ORC (organic Rankine cycle) system. The gas-flow-adjustable centripetal turbine comprises an actuating mechanism, a rotating shaft, a pull ring, a wheel cover, a cam, a connecting piece and blades, the wheel cover and the pull ring are both annular, the pull ring is coaxially arranged on one side of the wheel cover, a plurality of cams are fixedly connected to the pull ring in the circumferential direction of the pull ring at uniform intervals, each cam is connected with a connecting piece, and the end, away from the cam, of each connecting piece perpendicularly penetrates through the wheel cover and then is connected with a nozzle blade. The two ends of the rotating shaft are connected with a pull ring and the executing mechanism respectively. The device has the advantages that the angles of the nozzle blades can be automatically adjusted according to the ORC operation working conditions, so that the air quantity of a turbine is changed, and the highest generating capacity of an ORC system is guaranteed under different working conditions.

Description

Technical Field

[0001] This utility model relates to the field of cryogenic power generation technology, and in particular to a centripetal turbine with adjustable gas volume for ORC systems. Background Technology

[0002] The Organic Rankine Cycle (ORC) is a thermodynamic cycle technology that uses low-boiling-point organic working fluids to recover low-temperature waste heat for power generation. Its core principle is similar to that of the traditional steam Rankine cycle, but it achieves efficient utilization of low-temperature heat sources through optimization of working fluid characteristics.

[0003] The ORC system comprises four main components: turbine, evaporator, condenser, and working fluid pump. The turbine is the core device that converts the heat of the organic working fluid into electrical energy. Turbines are mainly classified as axial, centrifugal, and radial. In an ORC system using a radial turbine, the high-temperature, high-pressure organic working fluid first enters the volute and then expands and accelerates through the nozzle ring, converting thermal energy into kinetic energy. Subsequently, it impacts the radial turbine blades, driving the turbine to rotate at high speed, converting kinetic energy into mechanical energy.

[0004] The gas volume of a radial turbine is determined by the size of the nozzle and the turbine itself and is not adjustable. During operation, under conditions deviating from the design specifications, the inability to adjust the gas volume prevents the achievement of optimal power generation efficiency. Utility Model Content

[0005] The purpose of this invention is to provide a centrifugal turbine with adjustable air volume for ORC systems, thereby solving the aforementioned problems existing in the prior art.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0007] A centripetal turbine with adjustable air volume for an ORC system includes an actuator, a shaft, a pull ring, a wheel cover, cams, connectors, and blades. The wheel cover and the pull ring are both annular. The pull ring is coaxially disposed on one side of the wheel cover. Multiple cams are fixedly connected to the pull ring at even intervals along its circumference. Each cam is connected to a connector. The end of the connector away from the cam passes vertically through the wheel cover and is connected to a nozzle blade. The two ends of the shaft are connected to the pull ring and the actuator, respectively.

[0008] Preferably, the outer periphery of the pull ring protrudes outward to form a connector, and one end of the rotating shaft is fixedly connected to the connector.

[0009] Preferably, one end of the rotating shaft is connected to a connecting rod, and the connecting rod is fixedly connected to the connector.

[0010] Preferably, the connector is a connecting shaft, the large-diameter end of the cam is fixedly connected to the nozzle blade via the connecting shaft, and the small-diameter end of the cam is fixedly connected to the pull ring.

[0011] The beneficial effects of this invention are: it can automatically adjust the angle of the nozzle blades according to the operating conditions of the ORC, thereby changing the gas volume of the turbine, thus ensuring the highest power generation of the ORC system under different operating conditions. Attached Figure Description

[0012] Figure 1 This is an exploded view of the centripetal turbine in an embodiment of this utility model;

[0013] Figure 2 This is a structural diagram of the cam and nozzle blade in an embodiment of this utility model;

[0014] Figure 3 This is a structural diagram of the rotating shaft and pull ring in an embodiment of this utility model;

[0015] Figure 4 This is a structural diagram of the centripetal turbine in an embodiment of this utility model;

[0016] Figure 5 This is another perspective structural diagram of the centripetal turbine in this embodiment of the utility model.

[0017] In the diagram: 1-shaft; 2-key; 3-connecting rod; 4-pull ring; 5-bolt; 6-wheel cover; 7-cam; 8-connecting shaft; 9-pin; 10-nozzle blade; 11-actuator. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the scope of the present utility model.

[0019] In this embodiment, as Figures 1 to 5 As shown, a centripetal turbine with adjustable air volume for an ORC system is provided, including an actuator 11, a rotating shaft 1, a pull ring, a wheel cover 6, cams 7, a connector, and blades; the wheel cover 6 and the pull ring are both annular, the pull ring is coaxially disposed on one side of the wheel cover 6, a plurality of cams 7 are fixedly connected at even intervals along the circumference of the pull ring, and a connector is connected to each cam 7. The end of the connector away from the cam 7 passes vertically through the wheel cover 6 and is connected to a nozzle blade 10. The two ends of the rotating shaft 1 are respectively connected to the pull ring and the actuator 11.

[0020] In this embodiment, as Figure 3As shown, the outer periphery of the pull ring protrudes outward to form a connector, and one end of the rotating shaft 1 is fixedly connected to the connector. One end of the rotating shaft 1 is connected to the connecting rod 3, and the connecting rod 3 is fixedly connected to the connector. The rotating shaft 1 and the connecting rod 3 are connected by a key 2, and the connecting rod 3 and the pull ring are connected by an interference fit. When the actuator 11 is working, it will drive the pull ring to swing through the rotating shaft 1 and the connecting rod 3. The actuator 11 is a motor.

[0021] In this embodiment, as Figure 2 As shown, the connecting component is a connecting shaft 8. The large-diameter end of the cam 7 is fixedly connected to the nozzle blade 10 via the connecting shaft 8, and the small-diameter end of the cam 7 is fixedly connected to the pull ring. The small-diameter end of the cam 7 is fixed to the pull ring by bolts 5. When the pull ring swings, the cam 7 will also rotate accordingly.

[0022] The nozzle blade 10 is connected to the connecting shaft 8 via pin 9, and the connecting shaft 8 is fixedly connected to the large-diameter end of the cam 7. Rotation of the cam 7 drives the nozzle blade 10 to rotate, thus allowing the angle of the nozzle blade 10 to be adjusted. (See appendix) Figure 2 and attached Figure 4 The nozzle blade 10 is arc-shaped, and the middle part of the nozzle blade 10 is fixedly connected to the connecting shaft 8 by two pins 9. Multiple nozzle blades 10 are arranged sequentially along the circumference of the wheel cover 6.

[0023] In this embodiment, the principle of changing the nozzle blade 10 angle is as follows: the actuator 11 drives the rotating shaft 1 to rotate, and the rotating shaft 1 drives the pull ring to swing via the connecting rod 3. The pull ring drives the cam 7 to rotate, which in turn drives the nozzle blade 10 to rotate by a corresponding angle via the connecting shaft 8, thereby achieving the purpose of adjustable nozzle blade 10 angle. When the ORC system heat source operating condition deviates from the design point, the ORC operates under deviated operating conditions. In order to achieve the maximum power generation, the control program calculates and controls the actuator 11 to rotate, changing the angle of the nozzle blade 10 to reach the optimal angle under the current operating conditions, thereby controlling the turbine intake volume and ensuring the system's maximum power generation.

[0024] By adopting the above-disclosed technical solution of this utility model, the following beneficial effects are obtained:

[0025] This invention provides a centripetal turbine with adjustable air volume for ORC systems, which can automatically adjust the angle of the nozzle blades according to the operating conditions of ORC, thereby changing the air volume of the turbine and ensuring the highest power generation of the ORC system under different operating conditions.

[0026] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A centrifugal turbine with adjustable gas volume for an ORC system, characterized in that: It includes an actuator, a rotating shaft, a pull ring, a wheel cover, a cam, a connector, and a blade; the wheel cover and the pull ring are both annular, the pull ring is coaxially disposed on one side of the wheel cover, a plurality of cams are fixedly connected at even intervals along the circumference of the pull ring, and a connector is connected to each cam. The end of the connector away from the cam passes vertically through the wheel cover and is connected to a nozzle blade. The two ends of the rotating shaft are respectively connected to the pull ring and the actuator.

2. The centripetal turbine with adjustable gas volume for an ORC system according to claim 1, characterized in that: The outer periphery of the pull ring protrudes outward to form a connector, and one end of the rotating shaft is fixedly connected to the connector.

3. The centripetal turbine with adjustable gas volume for an ORC system according to claim 2, characterized in that: One end of the rotating shaft is connected to the connecting rod, and the connecting rod is fixedly connected to the connector.

4. The centripetal turbine with adjustable gas volume for an ORC system according to claim 3, characterized in that: The connector is a connecting shaft. The large-diameter end of the cam is fixedly connected to the nozzle blade via the connecting shaft, and the small-diameter end of the cam is fixedly connected to the pull ring.

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