Engine rotation speed safety monitoring device

Abstract

The utility model discloses a kind of engine speed safety monitoring devices, belong to engine testing technical field, including photoelectric encoder, pulse converter, stabilized power supply, signal line and rack control module, the photoelectric encoder is fixedly connected by bolt with the pulley of engine, for measuring and monitoring engine speed signal, the output port of photoelectric encoder is connected with the input port of pulse converter by signal line, for converting the signal of photoelectric encoder into frequency signal, a road for this device uses, the channel of engine speed signal safety monitoring is configured in the rack control module, for monitoring the speed state of engine, coupling, elastomer, dynamometer by calculating speed difference value, the utility model has directly accurate monitoring engine speed, and engine, coupling, elastomer and dynamometer complete system monitoring coverage are wide, and monitoring timeliness and safety are high and the technical effect of low investment cost.

Description

Technical Field

[0001] This utility model belongs to the field of engine testing technology, and in particular relates to an engine speed safety monitoring device. Background Technology

[0002] During bench testing, the engine must be rigidly connected to the dynamometer via bolts using a coupling. During the test, the engine speed is extremely high (up to 3500 rpm for diesel engines and 6500 rpm for gasoline engines), which can easily lead to sudden situations such as bolt loosening / breakage, coupling breakage, and elastomer damage, causing significant injury and property damage to personnel, equipment, and the engine.

[0003] Currently, there are no products on the market that directly monitor engine speed for safety. Existing technologies mostly provide indirect protection by monitoring dynamometer vibration, engine temperature, and pressure. However, damage to the engine, couplings, elastomers, and dynamometers still frequently occurs, resulting in losses ranging from tens of thousands to over a million yuan. To avoid such accidents, this invention designs a safety device that directly monitors engine speed, ensuring testing safety at a lower cost. Utility Model Content

[0004] To address the problems existing in the prior art, this utility model provides an engine speed safety monitoring device, which has the advantages of directly and accurately monitoring engine speed, having a wide monitoring coverage of the entire system including the engine, coupling, elastomer and dynamometer, high monitoring timeliness and safety, and low investment cost. It solves the problems of poor timeliness, frequent accidents and easy major equipment losses caused by monitoring engine safety through indirect parameters in the prior art, as well as the limited monitoring range.

[0005] This invention is implemented as follows: an engine speed safety monitoring device includes a photoelectric encoder, a pulse converter, a regulated power supply, signal lines, and a bench control module. The photoelectric encoder is fixed to the engine pulley by bolts and is used to measure and monitor engine speed signals. The output port of the photoelectric encoder is connected to the input port of the pulse converter via a signal line. One output port of the pulse converter is connected to the input port of the bench control module via a signal line, and the power supply port of the pulse converter is connected to the regulated power supply to convert the photoelectric encoder signal into a frequency signal. One signal is used by this device, and the other is reserved for other devices. The bench control module is equipped with a channel for engine speed signal safety monitoring, which is used to monitor the speed status of the engine, coupling, elastomer, and dynamometer by calculating the speed difference.

[0006] With this setup, the photoelectric encoder directly acquires the engine speed signal, which is then converted by the pulse converter and transmitted to the bench control module. Combined with the speed difference calculation, it enables real-time speed monitoring of the engine, coupling, elastomer, and dynamometer. This solves the lag problem of indirect monitoring in existing technologies, improves the timeliness and reliability of monitoring, and effectively reduces the risk of accidents.

[0007] As a preferred embodiment of this invention, when the photoelectric encoder is installed, a dial indicator is used to check the fit clearance between the photoelectric encoder and the engine block.

[0008] This setting allows for precise control of the installation gap between the photoelectric encoder and the engine block, ensuring its coaxiality with the pulley, avoiding speed signal acquisition errors caused by installation deviations, and improving the accuracy of signal acquisition.

[0009] As a preferred embodiment of this invention, the signal lines include an input signal line connecting the photoelectric encoder and the pulse converter, and an output signal line connecting the pulse converter and the bench control module, and the connection between each signal line and its corresponding port meets the pin definition requirements.

[0010] This setting clarifies the connection specifications between signal lines and the ports of each component, ensuring the correct transmission paths for speed and control signals, preventing signal loss, equipment damage, or monitoring failure due to incorrect connections, and guaranteeing stable operation of the device.

[0011] As a preferred embodiment of this invention, the regulated power supply provides 24V power to the pulse converter.

[0012] This setting provides a stable operating voltage for the pulse converter, preventing voltage fluctuations from affecting its signal conversion accuracy and stability, ensuring continuous and accurate frequency signal output, and providing reliable input for the monitoring and calculation of the bench control module.

[0013] Compared with existing technologies, the beneficial effects of this utility model are as follows: It directly monitors engine speed, offering higher timeliness, safety, and reliability; it effectively reduces accidents such as loose and broken bolts, and damage to couplings / elastomers, significantly lowering the probability of accidents and ensuring the safety of personnel and equipment assets; by monitoring the "dynamometer, elastomer, coupling, and engine" through speed difference, monitoring expands from a "point" to a "line," providing more comprehensive coverage and a wider monitoring range; the monitored engine speed data is highly accurate and convincing; after the device alarms, troubleshooting is simple and easy to operate; the device is easy to learn and operate, and its lightweight and flexible structure allows for easy relocation between different test benches, making it highly versatile. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the connection structure of each component provided in the embodiment of this utility model.

[0015] In the diagram: 1. Photoelectric encoder; 2. Pulse converter; 3. Regulated power supply; 4. Signal line; 5. Bench control module. Detailed Implementation

[0016] To further understand the utility model content, features and effects of this utility model, the following embodiments are provided, and detailed descriptions are given in conjunction with the accompanying drawings.

[0017] The structure of this utility model will now be described in detail with reference to the accompanying drawings.

[0018] refer to Figure 1 As shown in the figure, an engine speed safety monitoring device provided by this utility model includes a photoelectric encoder 1, a pulse converter 2, a regulated power supply 3, a signal line 4, and a bench control module 5. The photoelectric encoder 1 is fixed to the engine pulley by bolts and is used to measure and monitor the engine speed signal. The output port of the photoelectric encoder 1 is connected to the input port of the pulse converter 2 through the signal line 4. One end of the output port of the pulse converter 2 is connected to the input port of the bench control module 5 through the signal line 4, and the power supply port of the pulse converter 2 is connected to the regulated power supply 3 to convert the signal of the photoelectric encoder 1 into a frequency signal. One signal is used by this device, and the other is reserved for other devices. The bench control module 5 is equipped with a channel for engine speed signal safety monitoring, which is used to monitor the speed status of the engine, coupling, elastomer, and dynamometer by calculating the speed difference.

[0019] Using the above scheme, the photoelectric encoder 1 directly collects the engine speed signal, which is then converted by the pulse converter 2 and transmitted to the bench control module 5. Combined with the speed difference calculation, it realizes real-time speed monitoring of the engine, coupling, elastomer, and dynamometer, which solves the problem of lag in the indirect monitoring of the existing technology, improves the timeliness and reliability of monitoring, and effectively reduces the risk of accidents.

[0020] Specifically, when the photoelectric encoder 1 is installed, a dial indicator is used to check the fit clearance between the photoelectric encoder 1 and the engine body.

[0021] By adopting the above solution, the installation gap between the photoelectric encoder 1 and the engine body can be precisely controlled, ensuring its coaxiality with the pulley, avoiding speed signal acquisition errors caused by installation deviations, and improving the accuracy of signal acquisition.

[0022] Specifically, the signal line 4 includes an input signal line 4 connecting the photoelectric encoder 1 and the pulse converter 2, and an output signal line 4 connecting the pulse converter 2 and the bench control module 5, and the connection of each signal line 4 to the corresponding port meets the pin definition requirements.

[0023] By adopting the above scheme, the connection specifications between signal line 4 and the ports of each component are clarified to ensure that the transmission paths of speed signals and control signals are correct, prevent signal loss, equipment damage or monitoring failure due to incorrect connection, and ensure stable operation of the device.

[0024] Specifically, the regulated power supply 3 provides 24V power to the pulse converter 2.

[0025] The above scheme provides a stable operating voltage for the pulse converter 2, avoids voltage fluctuations from affecting its signal conversion accuracy and stability, ensures continuous and accurate frequency signal output, and provides reliable input for the monitoring and calculation of the bench control module 5.

[0026] The working principle of this utility model: In use, first install the photoelectric encoder 1. Use a dial indicator to check the clearance between the photoelectric encoder 1 and the engine block to ensure installation accuracy. Then, securely connect the photoelectric encoder 1 to the engine pulley with bolts, ensuring that the photoelectric encoder 1 rotates synchronously with the pulley to accurately acquire the speed signal. Connect the output port of the photoelectric encoder 1 to the input port of the pulse converter 2 using input signal line 4 to ensure stable transmission of the speed signal. Connect the output port of the pulse converter 2 to the input port of the test bench control module 5 using output signal line 4, so that the converted frequency signal is received by the test bench control module 5. The regulated power supply 3 is connected to the power supply port of the pulse converter 2 to provide it with stable power. The engine speed signal safety monitoring channel is defined and configured in the bench control system. Based on the transmission relationship of the engine, coupling, elastomer and dynamometer, the theoretical speed difference range of each component is calculated by a preset formula. The speed difference is monitored in real time. If the difference exceeds the safe range, the bench control module 5 will immediately alarm to remind you to check the fault. In addition to the frequency signal converted by the pulse converter 2 for use by the bench control module 5 of this device, one channel is reserved. It can be connected to other devices such as data loggers as needed to expand the application scenarios.

[0027] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0028] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An engine speed safety monitoring device, characterized in that: The system includes a photoelectric encoder (1), a pulse converter (2), a regulated power supply (3), a signal line (4), and a bench control module (5). The photoelectric encoder (1) is fixed to the engine pulley by bolts and is used to measure and monitor the engine speed signal. The output port of the photoelectric encoder (1) is connected to the input port of the pulse converter (2) via a signal line (4); One output port of the pulse converter (2) is connected to the input port of the bench control module (5) via a signal line (4), and the power supply port of the pulse converter (2) is connected to a regulated power supply (3) to convert the signal of the photoelectric encoder (1) into a frequency signal, one of which is used for this device and the other is reserved for other devices; The bench control module (5) is equipped with a channel for safe monitoring of engine speed signals, which is used to monitor the speed status of the engine, coupling, elastomer and dynamometer by calculating the speed difference.

2. The engine speed safety monitoring device as described in claim 1, characterized in that: When the photoelectric encoder (1) is installed, a dial indicator is used to check the fit clearance between the photoelectric encoder (1) and the engine body.

3. The engine speed safety monitoring device as described in claim 1, characterized in that: The signal line (4) includes an input signal line (4) connecting the photoelectric encoder (1) and the pulse converter (2) and an output signal line (4) connecting the pulse converter (2) and the bench control module (5), and the connection of each signal line (4) to the corresponding port meets the pin definition requirements.

4. The engine speed safety monitoring device as described in claim 1, characterized in that: The regulated power supply (3) provides 24V power to the pulse converter (2).

Images