Dual-pump testing system suitable for dry pumps and testing method thereof

Abstract

Disclosed in the present invention are a dual-pump testing system suitable for dry pumps and a testing method thereof. The system comprises a data processing module, a working condition information detection module, a temperature measurement module, and two output modules. The two output modules are respectively used for adaptively connecting to dry pumps under test at different voltage levels; an output end of the data processing module is connected to the two output modules respectively, so as to send, by means of either output module, an output instruction having self-defined rotational speed and frequency values to the corresponding dry pump under test. An input end of the data processing module is connected to the working condition information detection module and the temperature measurement module respectively, and a collection end of the working condition information detection module is connected to the dry pumps under test so as to collect and acquire in real time various operating parameters of the dry pumps under test under operating conditions. The temperature measurement module is used for collecting cavity temperature and body temperature of the dry pumps under test. On the basis of the various operating parameters, the cavity temperature and the body temperature, the data processing module correspondingly controls the operation of the dry pumps under test by means of the output modules.

Description

A dual-machine test system and test method for dry pumps Technical Field

[0001] This invention relates to the technical field of dry pump testing, and in particular to a dual-machine testing system and testing method suitable for dry pumps. Background Technology

[0002] A dry pump, also known as a dry vacuum pump, is a mechanical vacuum pump that can start pumping gas from atmospheric pressure and then directly discharge the pumped gas into the atmosphere. There is no oil or other working medium in the pump chamber, and the ultimate pressure of the pump is on the same order of magnitude or close to that of an oil-sealed vacuum pump.

[0003] Secondly, existing dry pump systems can only be tested and run after the entire dry pump is assembled. The assembly of the motor, lower pump, and upper pump cannot be tested separately during the assembly process. Problems can only be discovered during the overall machine operation test, and the cause must be slowly investigated. This relies heavily on the assembly experience of the workers. Due to the lack of testing equipment during the assembly process, relying solely on the experience of the assembly workers makes it difficult to detect problems in a timely manner. If problems are found during the final overall machine operation test, it will be very difficult to quickly and accurately locate the problem, which is extremely time-consuming and labor-intensive. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide a dual-machine testing system and testing method suitable for dry pumps.

[0005] To achieve the above objectives, the present invention provides a dual-machine testing system for dry pumps, comprising a data processing module, a working condition information detection module, a temperature detection module, and two output modules. The two output modules are respectively used to adapt and connect to dry pumps under test with different voltage levels. The output terminal of the data processing module is connected to both output modules to send output commands with self-defined speed and frequency values ​​to the dry pump under test via either output module. The input terminal of the data processing module is connected to the working condition information detection module and the temperature detection module. The acquisition terminal of the working condition information detection module is connected to the dry pump under test to acquire various operating parameters of the dry pump under test in real time. The temperature detection module is used to acquire the cavity temperature and body temperature of the dry pump under test. Based on the various operating parameters, cavity temperature, and body temperature, the data processing module controls the operation of the dry pump under test through the output modules.

[0006] A test method for a dual-machine test system for dry pumps as described in any one of claims 1, characterized in that it includes the following steps:

[0007] S1: Any output module can be independently connected to the adapted dry pump under test;

[0008] S2: Manually set the output speed and frequency values, and the data processing module sends an output command with the speed and frequency values ​​to the dry pump under test through the output module;

[0009] S3. The dry pump under test receives the output command and operates according to the automatically set output speed and frequency values;

[0010] S4. The operating condition information detection module collects various operating parameters of the dry pump under test in real time under operating conditions and feeds back the collected operating parameters to the data processing module. Among them, during the operation of the dry pump under test, the temperature detection module collects the cavity temperature and body temperature of the dry pump under test in real time, and feeds back the collected cavity temperature and body temperature to the data processing module.

[0011] S5. The data processing module displays the received operating parameters and, based on abnormal cavity temperature and / or machine body temperature, issues an alarm and controls the start and stop of the dry pump under test accordingly.

[0012] Furthermore, when any output module is connected to the dry pump under test, the DC resistance values ​​of the stator and rotor of the connected dry pump under test are detected and transmitted to the data processing module. The data processing module compares the DC resistance values ​​of the stator and rotor with the preset rated values. If the comparison is consistent, normal testing can be performed; otherwise, if the comparison is inconsistent, a warning is issued.

[0013] Furthermore, when the temperature detection module detects that the body temperature exceeds 65°C and / or the cavity temperature exceeds 160°C, the data processing module issues an alarm and controls the dry pump under test to stop.

[0014] Furthermore, the operating parameters include actual speed, actual frequency, operating voltage, operating current, operating power, and output torque.

[0015] Furthermore, when the operating current exceeds the preset protection current value, the data processing module issues an alarm and controls the dry pump under test to stop.

[0016] Furthermore, during the operation of the dry pump under test, personnel listen for any metallic friction sounds emitted by the pump; if such sounds are heard, the pump is stopped.

[0017] The present invention employs the above-described solution, and its beneficial effects are as follows: During the dry pump assembly process, the motor section, the lower pump, the upper pump, or other processes requiring testing can be tested in advance. It is particularly effective when assembly workers lack experience. For example, if the motor assembly is too tight and the operating current is too high, it can be immediately reassembled in this process, preventing the fault from spreading to the next process. During single-pump testing of the lower pump, issues such as excessive current, abnormal noise, and rapid temperature rise can be quickly identified as assembly problems in the pump body. The pump body can be reassembled with minimal disassembly without affecting other processes. This significantly improves the success rate of the entire machine assembly on the first attempt. Attached Figure Description

[0018] Figure 1 is a schematic diagram of the dual-machine test system. Detailed Implementation

[0019] To facilitate understanding of the present invention, a more complete description is given below with reference to the accompanying drawings. Preferred embodiments of the invention are shown in the drawings. However, the invention can be implemented in many different forms and is not limited to the embodiments described herein. These embodiments are provided to provide a thorough and complete understanding of the disclosure of the invention.

[0020] Referring to Figure 1, in this embodiment, a dual-machine testing system suitable for dry pumps includes a data processing module, a working condition information detection module, a temperature detection module, and two output modules. The two output modules are used to adapt to and connect dry pumps under test with different voltage levels. That is, one output module corresponds to one voltage level of dry pump under test, and the two output modules can independently cooperate with the corresponding voltage level of dry pump under test and are not used interchangeably. For ease of explanation, the voltage levels of the two dry pumps under test are defined as AC220V and AC380V, respectively.

[0021] In this embodiment, each output module consists of a frequency converter and a transformer. An external power supply is connected to the transformer for voltage transformation (to save manufacturing costs, the two output modules can share a single transformer). The frequency converter is used to output different output frequencies, thereby correspondingly achieving output control of the self-defined speed and frequency values. Secondly, the output terminal of the data processing module is connected to both output modules to send output commands with self-defined speed and frequency values ​​to the dry pump under test via either output module, so that the dry pump under test can operate according to the expected operating conditions.

[0022] In this embodiment, the input terminals of the data processing module are connected to the operating condition information detection module and the temperature detection module, respectively. The acquisition terminal of the operating condition information detection module is connected to the dry pump under test to acquire various operating parameters of the dry pump under test in real time. Specifically, these operating parameters include actual speed, actual frequency, operating voltage, operating current, operating power, and output torque. The temperature detection module is used to acquire the cavity temperature and body temperature of the dry pump under test. Based on the various operating parameters, cavity temperature, and body temperature, the data processing module controls the operation of the dry pump under test through the output module. Specifically, the temperature detection module can use temperature sensors placed in the dry pump cavity and the dry pump housing, respectively.

[0023] In this embodiment, the data processing module controls the operation of the dry pump under test through the output module based on various operating parameters, cavity temperature, and machine body temperature.

[0024] Specifically, to facilitate understanding, the following explanation will be provided in conjunction with specific testing methods.

[0025] The testing method includes the following steps:

[0026] S1: Each output module can be independently connected to the corresponding dry pump under test. In actual use, you can choose to test one dry pump under test for a single voltage level, or you can choose to test two dry pumps under test for different voltage levels at the same time. Just make sure that the two sets of output modules are connected to the corresponding dry pumps under test. The two sets of tests do not interfere with each other and are conducted independently.

[0027] S2: Manually set the output speed and frequency values, and the data processing module sends an output command with the speed and frequency values ​​to the dry pump under test through the output module;

[0028] S3. The dry pump under test receives the output command and operates according to the automatically set output speed and frequency values;

[0029] S4. The operating condition information detection module collects various operating parameters of the dry pump under test in real time under operating conditions and feeds back the collected operating parameters to the data processing module. Among them, during the operation of the dry pump under test, the temperature detection module collects the cavity temperature and body temperature of the dry pump under test in real time, and feeds back the collected cavity temperature and body temperature to the data processing module.

[0030] S5. The data processing module displays the received operating parameters and, based on abnormal cavity temperature and / or machine body temperature, issues an alarm and controls the start and stop of the dry pump under test accordingly.

[0031] To prevent the misconnection of the output module, before the test in step S2, when any output module is connected to the dry pump to be tested, the DC resistance values of the stator and rotor of the dry pump to be tested are detected and transmitted to the data processing module. Among them, the data processing module compares the DC resistance values of the stator and rotor with the preset rated values. If the comparison is consistent, the normal test can be carried out; otherwise, if the comparison is inconsistent, a warning is issued. Thus, it is convenient for the operator to connect the correct output module to the dry pump to be tested that matches it in time, so as to carry out the normal test and effectively prevent the situation of personal injury and equipment damage caused by wrong connection by personnel.

[0032] In step S5, when the temperature detection module detects that the body temperature exceeds 65°C and / or the cavity temperature exceeds 160°C, the data processing module issues an alarm and controls the dry pump to be tested to stop, so as to timely judge whether the dry pump to be tested is within the allowable temperature range.

[0033] In this embodiment, the operating parameters collected in real time by the working condition information detection module include the actual speed, actual frequency, operating voltage, operating current, operating power, and output torque. The operator can intuitively understand each operating parameter in the first time, so as to judge whether it is abnormal and then confirm whether the assembly is qualified. Secondly, in this embodiment, when the operating current is higher than the preset protection current value, the data processing module issues an alarm and controls the dry pump to be tested to stop, preventing excessive current and overload operation.

[0034] During the operation of the dry pump to be tested, the operator listens to whether there is a metal friction sound from the dry pump to be tested. If there is a metal friction sound, the machine is stopped, which means that there is unnecessary friction due to incorrect assembly and it needs to be disassembled and reassembled.

[0035] For the convenience of explanation, taking a single dry pump to be tested as an example, the operating current and noise at each frequency band of 5Hz, 15Hz, 30Hz, 45Hz, and 60Hz are corresponding, and each frequency band runs for 30 seconds to 60 seconds. Among them, if the operating current is not higher than the preset protection current value and no obvious metal friction sound is heard, it means that the assembly is qualified; otherwise, it means that the assembly is unqualified and needs to be disassembled and reassembled. The following is the test standard for the operating current and noise.

[0036] This test system has the following advantages:

[0037] 1. Modular design: The system adopts modular design, enabling the two output modules to independently cooperate with dry pumps to be tested with different voltage levels, improving the flexibility and applicability of the system.

[0038] 2. Cost saving: By sharing the transformer, the manufacturing cost is reduced while maintaining the high efficiency of the system.

[0039] 3. Precise control: The use of frequency converters allows for different output frequencies, thereby precisely controlling the speed and frequency of the dry pump under test, ensuring the accuracy and reliability of the test.

[0040] 4. Real-time monitoring: The operating condition information detection module and temperature detection module can collect the operating parameters and temperature of the dry pump under test in real time, providing accurate data support for the data processing module.

[0041] 5. Intelligent feedback and control: The data processing module can perform intelligent analysis based on real-time data and issue alarms or control the start and stop of the dry pump under test when an anomaly is detected, thereby improving the safety and reliability of the system.

[0042] In summary, this pump testing system, with its modular design, precise control, real-time monitoring, and intelligent feedback, provides an efficient and safe solution for the testing and quality control of dry pumps.

[0043] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the present invention in any way. Any modifications or variations made by those skilled in the art, without departing from the scope of the present invention, using the disclosed technical content, are equivalent embodiments of the present invention. Therefore, all equivalent changes made based on the concept of the present invention without departing from the scope of the present invention should be covered within the protection scope of the present invention.

Claims

1. A dual-machine testing system suitable for dry pumps, characterized in that: The system includes a data processing module, a working condition information detection module, a temperature detection module, and two output modules. The two output modules are used to adapt to and connect to dry pumps under test with different voltage levels. The output terminal of the data processing module is connected to both output modules to send output commands with automatically set speed and frequency values ​​to the dry pump under test via either output module. The input terminals of the data processing module are connected to the working condition information detection module and the temperature detection module. The acquisition terminal of the working condition information detection module is connected to the dry pump under test to acquire various operating parameters of the dry pump under operating conditions in real time. The temperature detection module is used to acquire the cavity temperature and body temperature of the dry pump under test. Based on the various operating parameters, cavity temperature, and body temperature, the data processing module controls the operation of the dry pump under test through the output modules.

2. A test method for a dual-machine test system suitable for dry pumps as described in any one of claims 1, characterized in that: Includes the following steps: S1: Any output module can be independently connected to the adapted dry pump under test; S2: Manually set the output speed and frequency values, and the data processing module sends an output command with the speed and frequency values ​​to the dry pump under test through the output module; S3. The dry pump under test receives the output command and operates according to the automatically set output speed and frequency values; S4. The operating condition information detection module collects various operating parameters of the dry pump under test in real time under operating conditions and feeds back the collected operating parameters to the data processing module. Among them, during the operation of the dry pump under test, the temperature detection module collects the cavity temperature and body temperature of the dry pump under test in real time, and feeds back the collected cavity temperature and body temperature to the data processing module. S5. The data processing module displays the received operating parameters and, based on abnormal cavity temperature and / or machine body temperature, issues an alarm and controls the start and stop of the dry pump under test accordingly.

3. The test method for a dual-machine test system suitable for dry pumps according to claim 2, characterized in that: When any output module is connected to the dry pump under test, the DC resistance values ​​of the stator and rotor of the connected dry pump under test are detected and transmitted to the data processing module. The data processing module compares the DC resistance values ​​of the stator and rotor with the preset rated values. If the comparison is consistent, normal testing can be performed; otherwise, if the comparison is inconsistent, a warning is issued.

4. The test method for a dual-machine test system suitable for dry pumps according to claim 2, characterized in that: When the temperature detection module detects that the body temperature exceeds 65°C and / or the cavity temperature exceeds 160°C, the data processing module issues an alarm and controls the dry pump under test to stop.

5. The test method for a dual-machine test system suitable for dry pumps according to claim 2, characterized in that: The operating parameters include actual speed, actual frequency, operating voltage, operating current, operating power, and output torque.

6. The test method for a dual-machine test system suitable for dry pumps according to claim 5, characterized in that: When the operating current exceeds the preset protection current value, the data processing module issues an alarm and controls the dry pump under test to stop.

7. The test method for a dual-machine test system suitable for dry pumps according to claim 2, characterized in that: During the operation of the dry pump under test, personnel listen for any metallic friction sounds. If a metallic friction sound is heard, the pump is stopped.

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