阅读说明：本技术 旋转机械设备测速系统 (Speed measuring system of rotary mechanical equipment ) 是由 何勋 于 2020-12-22 设计创作，主要内容包括：本申请涉及一种旋转机械设备测速系统,包括测速模块和通讯模块。其中,测速模块连接通讯模块。测速模块内配置有多条信号处理电路,各信号处理电路用于处理不同的测速传感器输入的信号,得到转速信息,并将转速信息发送到通讯模块,通讯模块还连接上位系统,用于将转速信息发送到上位系统。本申请中的测速模块采用了可以接入多种测速传感器的兼容性方案,测速模块通用性强,实施时,可通过三块测速模块分别接入不同的测速传感器同时对旋转机械设备进行测速,并最终通过三取二的决策来防止汽轮机超速。(The application relates to a speed measuring system of rotary mechanical equipment, which comprises a speed measuring module and a communication module. Wherein, the module that tests the speed is connected communication module. The communication module is also connected with an upper system and used for sending the rotating speed information to the upper system. The speed measuring module in this application has adopted the compatible scheme that can insert multiple speed sensor, and the module commonality of testing the speed is strong, and during the implementation, the three speed measuring modules of accessible insert different speed sensor respectively and measure the speed to mechanical equipment of rotation simultaneously to the decision-making that finally gets two through three prevents that the steam turbine from speeding.)

1. A rotating machinery speed measurement system, comprising:

the speed measuring module and the communication module;

the speed measuring module is connected with the communication module;

the speed measuring module is internally provided with a plurality of signal processing circuits, and each signal processing circuit is used for processing signals input by different speed measuring sensors to obtain rotating speed information and sending the rotating speed information to the communication module;

the communication module is also connected with an upper system and used for sending the rotating speed information to the upper system.

2. The system according to claim 1,

the speed measuring module comprises a CAN communication interface;

the speed measuring module is connected with the communication module through a CAN bus.

3. The system according to claim 1,

the speed measuring module further comprises an MODBUS communication interface.

4. The system according to claim 1,

the communication module is connected with an upper system through a PROFINET bus.

5. The system according to claim 1,

the plurality of signal processing circuits includes at least: the device comprises a magnetoelectric revolution speed sensor signal processing circuit, a reluctance revolution speed sensor signal processing circuit and an eddy current sensor signal processing circuit.

6. The system according to claim 1,

the speed measurement module supports hard node input and bus transmission input.

7. The speed measurement system of a rotating mechanical device according to claim 1, wherein the signal processing circuit is specifically configured to perform analog signal processing on the electrical signal input by the speed measurement sensor to obtain a digital pulse signal.

8. The system according to claim 7,

the speed measuring module comprises: the device comprises a speed measuring unit and a protection output unit;

the speed measuring unit is used for carrying out analog signal processing on the input electric signal to obtain a digital pulse signal;

the protection output unit is used for outputting a switching value protection signal to prevent the rotating mechanical equipment from overspeed.

9. The system according to claim 1,

the speed measuring module is also used for carrying out high-limit alarm and high-limit alarm output.

10. The system according to claim 7,

the speed measuring module carries out time statistics through the specified number of the digital pulse signals and converts the time statistics into corresponding rotating speed information.

Technical Field

The application relates to the technical field of rotating machinery speed measurement, in particular to a rotating machinery speed measurement system.

Background

In the thermal power industry, the safety of a steam turbine is always important, the maximum safety problem of the steam turbine is overspeed, and how to prevent the overspeed of the steam turbine is a big problem to be solved in the prior art. In the prior art, speed measurement of rotating machinery (also called turbomachinery) equipment is generally realized by a speed measurement sensor. In a traditional rotating speed measuring mode, the number of output pulses is calculated within a fixed time, and a rotating speed value is obtained through calculation. In the prior art, relevant modules for measuring speed of rotating mechanical equipment are relatively single in pertinence, for example, only a magnetic resistance type sensor can be accepted, and the speed cannot be measured by replacing another speed measuring sensor.

Disclosure of Invention

To overcome, at least to some extent, the problems in the related art, the present application provides a speed measurement system for a rotating mechanical device.

The scheme of the application is as follows:

a rotating mechanical device speed measurement system comprising:

the speed measuring module and the communication module;

the speed measuring module is connected with the communication module;

the speed measuring module is internally provided with a plurality of signal processing circuits, and each signal processing circuit is used for processing signals input by different speed measuring sensors to obtain rotating speed information and sending the rotating speed information to the communication module;

the communication module is also connected with an upper system and used for sending the rotating speed information to the upper system.

Preferably, in an implementable manner herein,

the speed measuring module comprises a CAN communication interface;

the speed measuring module is connected with the communication module through a CAN bus.

Preferably, in an implementable manner herein,

the speed measuring module further comprises an MODBUS communication interface.

Preferably, in an implementable manner herein,

the communication module is connected with an upper system through a PROFINET bus.

Preferably, in an implementable manner herein,

the plurality of signal processing circuits includes at least: the device comprises a magnetoelectric revolution speed sensor signal processing circuit, a magnetic resistance revolution speed sensor signal processing circuit and an eddy current sensor signal processing circuit.

Preferably, in an implementable manner herein,

the speed measurement module supports hard node input and bus transmission input.

Preferably, in an implementation manner of the present application, the signal processing circuit is specifically configured to perform analog signal processing on the electrical signal input by the tachometer sensor to obtain a digital pulse signal.

Preferably, in an implementable manner herein,

the speed measuring module comprises: the device comprises a speed measuring unit and a protection output unit;

the speed measuring unit is used for carrying out analog signal processing on the input electric signal to obtain a digital pulse signal;

the protection output unit is used for outputting a switching value protection signal and preventing the rotating mechanical equipment from overspeed.

Preferably, in an implementable manner herein,

the speed measuring module is also used for carrying out high-limit alarm and high-limit alarm output.

Preferably, in an implementable manner herein,

the speed measuring module carries out time statistics through the specified number of the digital pulse signals and converts the time statistics into corresponding rotating speed information.

The technical scheme provided by the application can comprise the following beneficial effects: the rotating machinery equipment speed measuring system in this application includes module and communication module of testing the speed. Wherein, the module that tests the speed is connected communication module. The communication module is also connected with an upper system and used for sending the rotating speed information to the upper system. The speed measuring module in this application has adopted the compatible scheme that can insert multiple speed sensor, and the module commonality of measuring the speed is strong, during the implementation, can insert different speed sensor respectively through three modules of measuring the speed and measure the speed to mechanical equipment of rotation simultaneously to the decision-making that finally gets two through three prevents that the steam turbine from speeding.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and together with the description, serve to explain the principles of the application.

Fig. 1 is a schematic structural diagram of a speed measurement system of a rotating mechanical device according to an embodiment of the present disclosure;

fig. 2 is a circuit diagram of a CAN communication interface in a speed measurement system of a rotating mechanical device according to an embodiment of the present disclosure;

fig. 3 is a circuit diagram of a MODBUS communication interface in a speed measurement system of a rotating mechanical device according to an embodiment of the present disclosure;

FIG. 4 is a circuit diagram of a test unit in a speed measurement system of a rotating machine according to an embodiment of the present disclosure;

fig. 5 is a circuit diagram of a protection output unit in a speed measurement system of a rotating mechanical device according to an embodiment of the present application.

Reference numerals: a speed measuring module-1; a communication module-2.

Detailed Description

Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the following exemplary embodiments do not represent all implementations consistent with the present application. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present application, as detailed in the appended claims.

A system for measuring speed of a rotating mechanical device, referring to fig. 1, comprising:

the system comprises a speed measuring module 1 and a communication module 2;

the speed measuring module 1 is connected with the communication module 2;

the speed measuring module 1 is internally provided with a plurality of signal processing circuits, and each signal processing circuit is used for processing signals input by different speed measuring sensors to obtain rotating speed information and sending the rotating speed information to the communication module 2;

the communication module 2 is further connected with an upper system and used for sending the rotating speed information to the upper system.

In the thermal power industry, the safety of a steam turbine is always important, the maximum safety problem of the steam turbine is overspeed, and how to prevent the overspeed of the steam turbine is a big problem to be solved in the prior art. In the prior art, a scheme that a high-speed counting module collects pulses of a Hall type element and then counts in logic to reversely deduce the rotating speed can also achieve the purpose of speed measurement, but the supported sensor type is single.

Preferably, the plurality of signal processing circuits in this embodiment at least include: the device comprises a magnetoelectric revolution speed sensor signal processing circuit, a reluctance revolution speed sensor signal processing circuit and an eddy current sensor signal processing circuit. The sensor that the module that tests the speed in this embodiment can dock includes at least: magnetoelectric tachometric transducer, reluctance tachometric transducer and eddy current sensor.

The speed measuring system of the rotating mechanical equipment in the embodiment comprises a speed measuring module 1 and a communication module 2. Wherein, the speed measuring module 1 is connected with the communication module 2. The speed measuring module 1 is internally provided with a plurality of signal processing circuits, each signal processing circuit is used for processing signals input by different speed measuring sensors to obtain rotating speed information and sending the rotating speed information to the communication module 2, and the communication module 2 is also connected with an upper system and used for sending the rotating speed information to the upper system. The speed measuring module 1 in this application has adopted the compatibility scheme that can insert multiple speed sensor, and speed measuring module 1 commonality is strong, and during the implementation, three pieces of speed measuring module 1 of accessible insert different speed sensor respectively and measure the speed to mechanical equipment of rotation simultaneously to the decision-making through three getting two finally prevents that the steam turbine from speeding.

The rotating mechanical device speed measurement system in some embodiments, referring to figures 2-3,

the speed measuring module 1 comprises a CAN communication interface;

the speed measuring module 1 is connected with the communication module 2 through a CAN bus.

The speed measuring module 1 further comprises a MODBUS communication interface.

The communication module 2 is connected with an upper system through a PROFINET bus.

In this embodiment, the speed measurement module 1 has both an MODBUS communication interface and a CAN communication interface, CAN be compatible with devices of other manufacturers, and CAN be used in cooperation with the communication module 2, and CAN also be incorporated into a PROFINET bus structure for use.

The circuit diagram of the CAN communication interface refers to fig. 3, and the circuit diagram of the MODBUS communication interface refers to fig. 4.

The rotating mechanical device speed measurement system in some embodiments,

the speed measuring module 1 supports hard node input and bus transmission input.

The speed measuring system has independent working capacity, the speed measuring module 1 can receive a test state signal to carry out a rotational speed overspeed test, and the test state signal can be input by a hard node or bus transmission. Therefore, even if the communication module 2 loses the connection with the upper system, the speed measuring system can still perform related high-limit alarm and high-limit alarm output through the speed measuring module 1.

The rotating mechanical device speed measurement system in some embodiments, referring to figures 4-5,

the speed measuring module 1 includes: the device comprises a speed measuring unit and a protection output unit;

the speed measuring unit is used for carrying out analog signal processing on the input electric signal to obtain a digital pulse signal;

the protection output unit is used for outputting a switching value protection signal to prevent the rotating mechanical equipment from overspeed.

In the prior art, a scheme that pulses of Hall-type elements are collected through a high-speed counting module and then counting is carried out in logic to reversely deduce the rotating speed is adopted. In the embodiment, the protection output unit is arranged to output the switching value protection signal to an external system through the terminal, so that overspeed is prevented.

Circuit diagram of the test unit referring to fig. 4, a circuit diagram of the protection output unit referring to fig. 5.

The rotating mechanical device speed measurement system in some embodiments,

the signal processing circuit is specifically configured to perform analog signal processing on an electrical signal input by the speed measurement sensor to obtain a digital pulse signal, and the speed measurement module 1 specifically performs time statistics on a specified number of digital pulse signals and converts the digital pulse signals into corresponding rotational speed information.

In a traditional rotating speed measuring mode, the number of output pulses is calculated within a fixed time, and a rotating speed value is obtained through calculation. In this rotation speed measurement method, a large error occurs at a low rotation speed, and therefore, the number of teeth must be increased to correspond to the number of pulses, but the low rotation speed cannot be measured when the number of teeth is small. In order to solve the above problem, the speed measuring module 1 in this embodiment implements high-precision speed measurement by a method of calculating a pulse width, and this way does not need to use too many teeth, and enables the speed measuring module to perform time statistics on the specified number of pulse widths, thereby converting the pulse widths into corresponding speed values.

It is understood that the same or similar parts in the above embodiments may be mutually referred to, and the same or similar parts in other embodiments may be referred to for the content which is not described in detail in some embodiments.

It should be noted that, in the description of the present application, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Further, in the description of the present application, the meaning of "a plurality" means at least two unless otherwise specified.

Any process or method descriptions in flow charts or otherwise described herein may be understood as representing modules, segments, or portions of code which include one or more executable instructions for implementing specific logical functions or steps of the process, and the scope of the preferred embodiments of the present application includes other implementations in which functions may be executed out of order from that shown or discussed, including substantially concurrently or in reverse order, depending on the functionality involved, as would be understood by those reasonably skilled in the art of the present application.

It should be understood that portions of the present application may be implemented in hardware, software, firmware, or a combination thereof. In the above embodiments, the various steps or methods may be implemented in software or firmware stored in memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, any one or combination of the following techniques, which are known in the art, may be used: a discrete logic circuit having a logic gate circuit for implementing a logic function on a data signal, an application specific integrated circuit having an appropriate combinational logic gate circuit, a Programmable Gate Array (PGA), a Field Programmable Gate Array (FPGA), or the like.

It will be understood by those skilled in the art that all or part of the steps carried by the method for implementing the above embodiments may be implemented by hardware that is instructed to be associated with a program, which may be stored in a computer-readable storage medium, and when the program is executed, the program includes one or a combination of the steps of the method embodiments.

In addition, functional units in the embodiments of the present application may be integrated into one processing module, or each unit may exist alone physically, or two or more units are integrated into one module. The integrated module can be realized in a hardware mode, and can also be realized in a software functional module mode. The integrated module, if implemented as a software functional module and sold or used as a stand-alone product, may also be stored in a computer readable storage medium.

The storage medium mentioned above may be a read-only memory, a magnetic or optical disk, etc.

In the description herein, reference to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the application. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

Although embodiments of the present application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present application, and that variations, modifications, substitutions and alterations may be made to the above embodiments by those of ordinary skill in the art within the scope of the present application.