Steam turbine performance testing device

Abstract

The utility model provides a steam turbine performance testing device which is characterized in that external steam is input into a steam turbine to be tested through an electric valve, the output end of the steam turbine is connected with the input end of a dynamometer, and a flow sensor and a pressure sensor are arranged between the steam output end of the electric valve and the steam input end of the steam turbine. According to the steam turbine performance testing device disclosed by the utility model, the electric valve, the dynamometer, the flow sensor, the pressure sensor, the first acquisition and conversion RS485 module, the second acquisition and conversion RS485 module, the PLC and the plurality of wireless communication modules are matched with one another, so that the performance of the steam turbine can be remotely tested; the device has the advantages of high automation degree, good safety and convenience in operation.

Description

Technical Field

[0001] The utility model belongs to the field of thermoelectric engineering, and particularly relates to a steam turbine performance testing device. Background Art

[0002] In the field of thermoelectric engineering, the stability of steam turbine performance has received extensive attention. How to ensure the stable operation state of the steam turbine under various working conditions has become a problem that technicians attach great importance to. Due to its small volume advantage, small steam turbines have been widely used. Conducting performance tests on small steam turbines under various working conditions to fully understand the performance quality of the steam turbine is a very important issue for the technological innovation of the steam turbine. Under the existing technical conditions, when conducting performance tests on steam turbines, there are generally problems such as low automation level, high manual consumption, low safety, and complex operation. Content of the Utility Model

[0003] In view of this, the utility model aims to overcome the defects in the prior art and proposes a steam turbine performance testing device.

[0004] To achieve the above object, the technical solution of the utility model is realized as follows:

[0005] A steam turbine performance testing device includes that external steam is input into the steam turbine to be tested through an electric valve, and the output end of the steam turbine is connected to the input end of a dynamometer;

[0006] A flow sensor and a pressure sensor are provided between the steam output end of the electric valve and the steam input end of the steam turbine; the RS485 interface of the electric valve is connected to the RS485 interface of the first wireless communication module; the signal output ends of the flow sensor and the pressure sensor are respectively connected to the acquisition input interfaces of the first acquisition conversion RS485 module, and the RS485 interface of the first acquisition conversion RS485 module is connected to the RS485 interface of the second wireless communication module; the signal output end of the dynamometer is connected to the acquisition input interface of the second acquisition conversion RS485 module, and the RS485 interface of the second acquisition conversion RS485 module is connected to the RS485 interface of the third wireless communication module;

[0007] The first wireless communication module, the second wireless communication module, and the third wireless communication module are all wirelessly connected to the fourth wireless communication module, and the RS485 interface of the fourth wireless communication module is connected to the RS485 interface of a programmable logic controller PLC.

[0008] In an embodiment of the utility model, the programmable logic controller PLC is connected to a touch screen through an Ethernet interface.

[0009] In an embodiment of the present utility model, the fourth wireless communication module, the touch screen, and the programmable logic controller (PLC) are all arranged in a safety room far away from the installation position of the steam turbine.

[0010] In an embodiment of the present utility model, the programmable logic controller (PLC) is connected to the touch screen through a USB interface.

[0011] In an embodiment of the present utility model, the first wireless communication module, the second wireless communication module, and the third wireless communication module are all wirelessly connected to the fourth wireless communication module through the LoRa mode.

[0012] Compared with the prior art, the present utility model has the following advantages:

[0013] A steam turbine performance testing device disclosed by the present utility model can realize remote testing of the steam turbine performance through the cooperation among an electric valve, a dynamometer, a flow sensor, a pressure sensor, a first acquisition and conversion RS485 module, a second acquisition and conversion RS485 module, a programmable logic controller (PLC), and multiple wireless communication modules, and has the advantages of high automation degree, good safety, and convenient operation. Description of the Drawings

[0014] The drawings constituting a part of the present utility model are used to provide a further understanding of the present utility model. The schematic embodiments of the present utility model and their descriptions are used to explain the present utility model and do not constitute an improper limitation to the present utility model.

[0015] In the drawings:

[0016] Figure 1 is a schematic structural diagram of a steam turbine performance testing device according to an embodiment of the present utility model;

[0017] Figure 2 is a schematic diagram of the testing principle of a steam turbine performance testing device according to an embodiment of the present utility model;

[0018] Figure 3 is a schematic diagram of the electric valve control of a steam turbine performance testing device according to an embodiment of the present utility model;

[0019] Figure 4 is a schematic diagram of the acquisition and transmission of the flow sensor and the pressure sensor of a steam turbine performance testing device according to an embodiment of the present utility model.

[0020] Description of the Reference Numerals:

[0021] 1 - Electric valve; 2 - Flow sensor; 3 - Pressure sensor; 4 - Dynamometer; 5 - First acquisition and conversion RS485 module; 6 - Second acquisition and conversion RS485 module; 7 - First wireless communication module; 8 - Second wireless communication module; 9 - Third wireless communication module; 10 - Fourth wireless communication module; 11 - Touch screen; 12 - Programmable logic controller PLC; 13 - Steam turbine. Detailed implementation manners

[0022] It should be noted that, without conflict, the embodiments in the present invention and the features in the embodiments can be combined with each other.

[0023] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0024] In the description of the present invention, it should be noted that, unless otherwise clearly defined and limited, the terms "installed", "connected", "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood through specific situations.

[0025] In the description of the present invention, it should be further noted that the terms "first", "second", etc. are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first", "second", etc. can explicitly or implicitly include one or more of such features. In the description of the present invention, unless otherwise stated, the meaning of "a plurality" is two or more.

[0026] Under the existing technical conditions, when performing performance tests on steam turbines, there are generally problems such as low automation level, high labor consumption, and complex operation.

[0027] Such as Figures 1 to 4As shown in the figure, a steam turbine performance testing device disclosed by the present utility model can remotely test the performance of a steam turbine through the cooperation of an electric valve 1, a dynamometer 4, a flow sensor 2, a pressure sensor 3, a first acquisition and conversion RS485 module 5, a second acquisition and conversion RS485 module 6, a programmable logic controller PLC12, and multiple wireless communication modules.

[0028] A steam turbine performance testing device disclosed by the present utility model can be applied to various scenarios for testing the performance of steam turbines, especially in scenarios for testing the performance of small steam turbines.

[0029] The present utility model will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments.

[0030] In an embodiment of the present utility model, as Figures 1 to 4 shown, a steam turbine performance testing device includes steam from the outside input into the steam turbine 13 to be tested through the electric valve 1, and the output end of the steam turbine 13 is connected to the input end of the dynamometer 4;

[0031] A flow sensor 2 and a pressure sensor 3 are provided between the steam output end of the electric valve 1 and the steam input end of the steam turbine 13; the RS485 interface of the electric valve 1 is connected to the RS485 interface of the first wireless communication module 7; the signal output ends of the flow sensor 2 and the pressure sensor 3 are respectively connected to the acquisition input interfaces of the first acquisition and conversion RS485 module 5, and the RS485 interface of the first acquisition and conversion RS485 module 5 is connected to the RS485 interface of the second wireless communication module 8; the signal output end of the dynamometer 4 is connected to the acquisition input interface of the second acquisition and conversion RS485 module 6, and the RS485 interface of the second acquisition and conversion RS485 module 6 is connected to the RS485 interface of the third wireless communication module 9;

[0032] The first wireless communication module 7, the second wireless communication module 8, and the third wireless communication module 9 are all wirelessly connected to the fourth wireless communication module 10, and the RS485 interface of the fourth wireless communication module 10 is connected to the RS485 interface of the programmable logic controller PLC12.

[0033] In this embodiment, the flow sensor 2 and the pressure sensor 3 are used to collect the flow value and the pressure value of the steam input into the steam turbine 13 to be tested.

[0034] Exemplarily, both the first acquisition and conversion RS485 module 5 and the second acquisition and conversion RS485 module 6 are 8-channel IO digital quantity to RS485 modules. The function of the first acquisition and conversion RS485 module 5 is to collect the signals output by the flow sensor 2 and the pressure sensor 3, convert them into RS485 signals, and input them into the second wireless communication module 8 for transmission. After being received by the corresponding fourth wireless communication module 10, the signals are transmitted to the programmable logic controller PLC12.

[0035] In this embodiment, the dynamometer 4 collects the working state of the output end of the steam turbine 13. The function of the second acquisition and conversion RS485 module 6 is to collect the measured values output by the dynamometer 4, convert them into RS485 signals, and input them into the third wireless communication module 9 for transmission. After being received by the corresponding fourth wireless communication module 10, the signals are transmitted to the programmable logic controller PLC12.

[0036] In this embodiment, an operator can send a control signal for the electric valve 1 through the programmable logic controller PLC12 to control the opening degree of the electric valve 1, change the input amount of the external steam of the steam turbine 13. The control signal is wirelessly transmitted to the first wireless communication module 7 through the fourth wireless communication module 10, and the first wireless communication module 7 sends it to the electric valve 1 through the RS485 interface for control.

[0037] In this embodiment, exemplarily, the first wireless communication module 7, the second wireless communication module 8, the third wireless communication module 9, and the fourth wireless communication module 10 can all be LoRa wireless remote transmission modules, and their function is to perform wireless remote transceiver based on RS485 signals.

[0038] In an embodiment of the present utility model, as Figure 3 shown, the programmable logic controller PLC12 is connected to the touch screen 11 through an Ethernet interface.

[0039] In this embodiment, an operator can set the opening degree of the electric valve 1 through the touch screen 11, understand the test data of the steam turbine 13 sent by the dynamometer 4, as well as the flow value and pressure value of the input steam collected by the flow sensor 2 and the pressure sensor 3.

[0040] In an embodiment of the present utility model, as Figure 2 and Figure 3 shown, the fourth wireless communication module 10, the touch screen 11, and the programmable logic controller PLC12 are all arranged in a safe room far away from the installation location of the steam turbine 13.

[0041] In this embodiment, this remote setting of the touch screen 11 and the programmable logic controller PLC12 ensures that the operator can stay away from the steam turbine 13 during the test, improving the safety of the testers during the test process.

[0042] In another embodiment of the present utility model, the programmable logic controller PLC12 can also be connected to the touch screen 11 through a USB interface.

[0043] In another embodiment of the present utility model, as Figure 1 shown, the first wireless communication module 7, the second wireless communication module 8, and the third wireless communication module 9 are all wirelessly connected to the fourth wireless communication module 10 through the LoRa mode.

[0044] In this embodiment, the wireless connection in the LoRa mode can ensure the stability and timeliness of data transmission.

[0045] The embodiments of the present utility model have been described above. However, these embodiments are only for illustrative purposes and not for limiting the scope of the present utility model. Although the above embodiments have been described separately, this does not mean that the measures in each embodiment cannot be used in combination advantageously. The scope of the present utility model is defined by the appended claims and their equivalents. Without departing from the scope of the present utility model, those skilled in the art can make various substitutions and modifications, and these substitutions and modifications should all fall within the scope of the present utility model.

Claims

1. A steam turbine performance testing device, characterized in that: External steam is input into the steam turbine (13) to be tested through an electric valve (1), and the output end of the steam turbine (13) is connected to the input end of a dynamometer (4). A flow sensor (2) and a pressure sensor (3) are provided between the steam output end of the electric valve (1) and the steam input end of the steam turbine (13); the RS485 interface of the electric valve (1) is connected to the RS485 interface of a first wireless communication module (7); the signal output ends of the flow sensor (2) and the pressure sensor (3) are respectively connected to the acquisition input interfaces of a first acquisition and conversion RS485 module (5), and the RS485 interface of the first acquisition and conversion RS485 module (5) is connected to the RS485 interface of a second wireless communication module (8); the signal output end of the dynamometer (4) is connected to the acquisition input interface of a second acquisition and conversion RS485 module (6), and the RS485 interface of the second acquisition and conversion RS485 module (6) is connected to the RS485 interface of a third wireless communication module (9). The first wireless communication module (7), the second wireless communication module (8), and the third wireless communication module (9) are all wirelessly connected to a fourth wireless communication module (10), and the RS485 interface of the fourth wireless communication module (10) is connected to the RS485 interface of a programmable logic controller PLC (12).

2. The steam turbine performance testing device according to claim 1, characterized in that: The programmable logic controller PLC (12) is connected to a touch screen (11) through an Ethernet interface.

3. The steam turbine performance testing device according to claim 2, wherein: The fourth wireless communication module (10), the touch screen (11), and the programmable logic controller PLC (12) are all arranged in a safe room far from the installation location of the steam turbine (13).

4. A steam turbine performance testing device according to claim 1, characterized in that: The programmable logic controller PLC (12) is connected to the touch screen (11) through a USB interface.

5. The steam turbine performance testing device according to claim 1, wherein: The first wireless communication module (7), the second wireless communication module (8), and the third wireless communication module (9) are all wirelessly connected to the fourth wireless communication module (10) in LoRa mode.

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