A dual-machine testing system and testing method suitable for dry pumps

Abstract

The present invention discloses a dual-machine testing system suitable for a dry pump, comprising a data processing module, a working condition information detection module, a temperature detection module and two output modules, wherein the two output modules are respectively used to adapt to and connect to dry pumps to be tested of different voltage levels, the output end of the data processing module is respectively connected to the two output modules so as to send output instructions with self-set speed values ​​and self-set frequency values ​​to the dry pump to be tested with the help of any output module; the input end of the data processing module is respectively connected to the working condition information detection module and the temperature detection module, the acquisition end of the working condition information detection module is connected to the dry pump to be tested so as to acquire various operating parameters of the dry pump to be tested under operating conditions in real time; the temperature detection module is used to collect the cavity temperature and body temperature of the dry pump to be tested; the data processing module controls the operation of the dry pump to be tested through the output module based on the various operating parameters, cavity temperature and body temperature.

Description

Technical Field

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

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

[0003] Secondly, the existing dry pump system can only be tested and operated after the entire assembly is complete. The assembly of the motor, lower pump, and upper pump cannot be tested separately during the process. Problems can only be discovered during the whole machine operation test and the cause can only be slowly investigated. This is very dependent on the assembly workers' experience. Due to the lack of testing equipment during the assembly process, problems that arise during the assembly process cannot be discovered in a timely manner. If a problem is discovered during the final whole machine operation test, it will be difficult to quickly and accurately find the problem, which is very time-consuming and labor-intensive. Summary of the Invention

[0004] The purpose of the present invention is to overcome the deficiencies of the prior art and to provide a dual-machine testing system and a testing method thereof suitable for a dry pump.

[0005] In order to achieve the above-mentioned purpose, the present invention provides a dual-machine testing system suitable for a dry pump, comprising a data processing module, an operating condition information detection module, a temperature detection module and two output modules, wherein the two output modules are respectively used to adapt to and connect to dry pumps to be tested with different voltage levels, and the output end of the data processing module is respectively connected to the two output modules to use any output module to send output instructions with self-set speed values ​​and self-set frequency values ​​to the dry pump to be tested; the input end of the data processing module is respectively connected to the operating condition information detection module and the temperature detection module, and the acquisition end of the operating condition information detection module is connected to the dry pump to be tested to acquire various operating parameters of the dry pump to be tested under operating conditions in real time; the temperature detection module is used to collect the cavity temperature and body temperature of the dry pump to be tested; the data processing module controls the operation of the dry pump to be tested through the output module based on the various operating parameters, cavity temperature and body temperature.

[0006] A test method for a dual-machine test system for a dry pump according to any one of claim 1, characterized in that it comprises the following steps:

[0007] S1: Any output module is independently connected to the adapted dry pump to be tested;

[0008] S2: Manually set the output speed self-set value and frequency self-set value, and the data processing module sends an output instruction with the speed self-set value and frequency self-set value to the dry pump to be tested through the output module;

[0009] S3. The dry pump to be tested receives the output command and operates according to the self-set output speed and frequency;

[0010] S4. The operating condition information detection module collects various operating parameters of the dry pump under operating conditions in real time and transmits the collected operating parameters to the data processing module. 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 the collected cavity temperature and body temperature are fed back to the data processing module;

[0011] S5. The data processing module displays the received operating parameters and issues an alarm and controls the start and stop of the dry pump to be tested accordingly when the cavity temperature and / or the body temperature are abnormal.

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

[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 to be tested to shut down.

[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 is higher than a preset protection current value, the data processing module issues an alarm and controls the dry pump to be tested to shut down.

[0016] Furthermore, during the operation of the dry pump to be tested, personnel listen to whether the dry pump to be tested makes a metal friction sound, and if there is a metal friction sound, the pump is shut down.

[0017] The present invention utilizes the above-mentioned solution, which has the beneficial effect of enabling pre-testing of the motor, single lower pump, single upper pump, or other processes requiring testing during dry pump assembly. This is particularly effective when the assembly workers are inexperienced. If the motor is over-tightened or the operating current is too high, it can be reassembled immediately during the current step, preventing the fault from being passed to the next step. During single-pump testing of the lower pump, excessive current, unusual noise, or rapid temperature rise can quickly identify assembly issues within the pump body. The pump body can then be reassembled with minimal disassembly without affecting other processes. This significantly improves the success rate of complete machine assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 Schematic diagram of the dual-machine test system. DETAILED DESCRIPTION

[0019] To facilitate understanding of the present invention, the present invention is described more fully below with reference to the accompanying drawings. The accompanying drawings illustrate preferred embodiments of the present invention. However, the present invention may be implemented in many different forms and is not limited to the embodiments described herein. These embodiments are provided solely to provide a more thorough and comprehensive understanding of the present disclosure.

[0020] See attached Figure 1 As shown, in this embodiment, a dual-machine testing system suitable for dry pumps includes a data processing module, an operating condition information detection module, a temperature detection module and two output modules, wherein the two output modules are respectively used to adapt to and connect dry pumps to be tested of different voltage levels, that is: one output module corresponds to a dry pump to be tested of one voltage level, and the two output modules can independently cooperate with the dry pumps to be tested of the corresponding voltage levels and are not mixed. For the sake of convenience of explanation, the voltage levels of the two dry pumps to be tested are defined as AC220V and AC380V respectively.

[0021] In this embodiment, each output module comprises a frequency converter and a transformer. The external power supply is connected to the transformer for voltage conversion (to save manufacturing costs, the two output modules can share a single transformer). The frequency converter is used to output different frequencies, thereby correspondingly controlling the output of the automatic speed and frequency settings. Secondly, the output terminal of the data processing module is connected to each of the two output modules. Through either output module, output commands with automatic speed and frequency settings are issued to the dry pump under test, ensuring that the dry pump under test operates according to the expected operating conditions.

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

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

[0024] Specifically, in order to facilitate understanding, further explanations are given below in conjunction with specific testing methods.

[0025] The test method includes the following steps:

[0026] S1: Any output module is independently connected to the dry pump to be tested. In actual use, you can choose to test a dry pump to be tested at one voltage level separately, or you can choose to test two dry pumps to be tested at different voltage levels simultaneously. You only need to ensure that the two sets of output modules are connected to the corresponding dry pumps to be tested. The two sets of tests will not interfere with each other and are independent.

[0027] S2: Manually set the output speed self-set value and frequency self-set value, and the data processing module sends an output instruction with the speed self-set value and frequency self-set value to the dry pump to be tested through the output module;

[0028] S3. The dry pump to be tested receives the output command and operates according to the self-set output speed and frequency;

[0029] S4. The operating condition information detection module collects various operating parameters of the dry pump under operating conditions in real time and transmits the collected operating parameters to the data processing module. 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 the collected cavity temperature and body temperature are fed back to the data processing module;

[0030] S5. The data processing module displays the received operating parameters and issues an alarm and controls the start and stop of the dry pump to be tested accordingly when the cavity temperature and / or the body temperature are abnormal.

[0031] To prevent misconnection of output modules, before performing step S2, 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 preset rated values. If the comparison is consistent, normal testing can be carried out; otherwise, a warning is issued. This allows the operator to promptly connect the correct output module to the corresponding dry pump under test, effectively preventing injuries and equipment damage caused by misconnection.

[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 shut down, so as to timely determine whether the dry pump to be tested is within the allowable temperature range.

[0033] In this embodiment, the operating condition information detection module collects operating parameters including actual speed, actual frequency, operating voltage, operating current, operating power, and output torque in real time. This allows operators to immediately and intuitively understand each operating parameter, facilitating the determination of any anomalies and, consequently, the qualified assembly. Furthermore, in this embodiment, when the operating current exceeds a preset protection current value, the data processing module issues an alarm and shuts down the dry pump under test to prevent excessive current and overload.

[0034] During the operation of the dry pump to be tested, the personnel listen to whether the dry pump to be tested makes a metallic friction sound. If there is a metallic friction sound, the pump is shut down, which means that the assembly is incorrect and unnecessary friction occurs, and the pump needs to be disassembled and reassembled.

[0035] For ease of explanation, the following uses a single dry pump under test as an example. The operating current and noise levels are measured at 5Hz, 15Hz, 30Hz, 45Hz, and 60Hz frequencies. Each frequency range is run for 30 to 60 seconds. If the operating current does not exceed the preset protection current value and no noticeable metallic friction sound is heard, the assembly is qualified. Otherwise, the assembly is unsatisfactory and requires disassembly and reassembly. The following describes the test standards for operating current and noise.

[0036] The test system has the following advantages:

[0037] 1. Modular design: The system adopts a modular design, which enables the two output modules to independently cooperate with the dry pumps under test of different voltage levels, improving the flexibility and applicability of the system.

[0038] 2. Cost savings: By sharing the transformer, manufacturing costs are reduced while maintaining high system efficiency.

[0039] 3. Precise control: The use of a frequency converter allows the output of different frequencies, thereby precisely controlling the speed and frequency of the dry pump to be tested, 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 to be tested 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 an alarm or control the start and stop of the dry pump under test when an anomaly is detected, improving the safety and reliability of the system.

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

[0043] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the present invention in any form. Any person skilled in the art who, without departing from the scope of the technical solution of the present invention, utilizes the technical content disclosed above to make more possible changes and modifications to the technical solution of the present invention, or modifications are all equivalent embodiments of the present invention. Therefore, any equivalent and equivalent changes made in accordance with the ideas of the present invention without departing from the content of the technical solution of the present invention should be included in the scope of protection of the present invention.

Claims

1. A dual-machine testing system suitable for dry pumps, characterized by: It includes a data processing module, a working condition information detection module, a temperature detection module and two output modules, wherein the two output modules are respectively used to adapt to and connect to dry pumps to be tested with different voltage levels, and the output end of the data processing module is respectively connected to the two output modules so as to send output instructions with self-set speed values ​​and self-set frequency values ​​to the dry pump to be tested with the help of any output module; the input end of the data processing module is respectively connected to the working condition information detection module and the temperature detection module, and the acquisition end of the working condition information detection module is connected to the dry pump to be tested to acquire various operating parameters of the dry pump to be tested under operating conditions in real time; the temperature detection module is used to collect the cavity temperature and body temperature of the dry pump to be tested; the data processing module controls the operation of the dry pump to be tested through the output module based on various operating parameters, cavity temperature and body temperature.

2. A test method for a dual-machine test system for a dry pump according to any one of claim 1, characterized in that: The following steps are involved: S1: Any output module is independently connected to the adapted dry pump to be tested; S2: Manually set the output speed self-set value and frequency self-set value, and the data processing module sends an output instruction with the speed self-set value and frequency self-set value to the dry pump to be tested through the output module; S3. The dry pump to be tested receives the output command and operates according to the self-set output speed and frequency; S4. The operating condition information detection module collects various operating parameters of the dry pump under operating conditions in real time and transmits the collected operating parameters to the data processing module. 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 the collected cavity temperature and body temperature are fed back to the data processing module; S5. The data processing module displays the received operating parameters and issues an alarm and controls the start and stop of the dry pump to be tested accordingly when the cavity temperature and / or the body temperature are abnormal.

3. The test method for a dual-machine test system for a dry pump according to claim 2, characterized in that: When any output module is connected to the dry pump to be tested, the DC resistance values ​​of the stator and rotor of the connected dry pump to be tested 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 carried out; otherwise, a warning is issued.

4. The test method for a dual-machine test system for a dry pump 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 to be tested to shut down.

5. The test method for a dual-machine test system for a dry pump 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 for a dry pump according to claim 5, characterized in that: 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 shut down.

7. The test method for a dual-machine test system for a dry pump according to claim 2, characterized in that: During the operation of the dry pump to be tested, personnel listen to whether the dry pump to be tested makes a metal friction sound. If there is a metal friction sound, the pump is shut down.

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