An automatic control system for lubrication and cooling of compressor units

Abstract

The present invention relates to the field of compressors, and is used to solve the problem that the lubrication of a compressor needs to be replenished by stopping the machine, and after replenishment, the lubricating oil needs to be preheated to spread the lubricating oil. The invention is specifically a compressor unit lubrication cooling automatic control system, comprising a compressor temperature acquisition unit, a data interaction analysis unit, a lubrication delivery control unit, a cooling delivery control unit and a lubrication acquisition unit. In the present invention, the operating temperature of the compressor is monitored, and the lubricating oil release and cooling mechanism of the compressor are controlled according to the monitoring result to ensure the timeliness of the release of the lubricating oil required by the compressor, and the operating temperature of the compressor is monitored by threshold value to ensure that the temperature of the compressor when the lubricating oil is released can ensure the basic fluidity of the lubricating oil, while preventing the operating temperature of the compressor from being too high to cause excessive fluidity of the lubricating oil, so as to realize automatic non-stop release of the lubricating oil and avoid the influence of stopping to add the lubricating oil on the operation of the compressor.

Description

Technical Field

[0001] The invention relates to the field of compressors, in particular to an automatic control system for lubrication and cooling of a compressor unit. Background Art

[0002] The compressor is the core component of many refrigeration systems. A reliable and efficient compressor is the basis for the smooth operation of the refrigeration system. Lubricating oil plays an important role as a lubricant, sealant and heat dissipator in the compressor. The viscosity and chemical stability of the lubricating oil are both functions of temperature, and these two properties have a direct impact on the effectiveness of compressor lubrication and sealing, thereby affecting the efficiency and reliability of the compressor. Generally, when designing a compressor, the appropriate lubricating oil is selected based on the temperature conditions and the properties of the refrigerant during the actual working process of the compressor.

[0003] At present, although the compressor in the prior art has temperature monitoring measures to ensure that the operating temperature of the compressor is not too high during operation, its monitoring function is single, and the lubricating oil of the compressor is generally replenished manually, and the compressor needs to be stopped for replenishment each time. After the replenishment is completed, since the compressor is in a cold state, it needs to be operated at a low load to allow the lubricating oil to be fully distributed to various components in the compressor, which makes the lubrication process of the compressor complicated, time-consuming and labor-intensive, and affects the normal operation of the compressor;

[0004] In view of the above technical problems, this application proposes a solution. Summary of the invention

[0005] In the present invention, the operating temperature of the compressor is monitored, and the lubricating oil release and cooling mechanism of the compressor is controlled according to the monitoring result, so as to ensure the timeliness of the release of the lubricating oil required by the compressor, and at the same time ensure that the temperature of the compressor when the lubricating oil is released can ensure the basic fluidity of the lubricating oil, improve the spreading speed of the lubricating oil, realize the automatic release of the lubricating oil without stopping, avoid the influence of stopping to add lubricating oil on the operation of the compressor, solve the problem that the lubrication of the compressor needs to be replenished during shutdown and the lubricating oil needs to be preheated after replenishment to spread the lubricating oil, and propose a compressor unit lubrication and cooling automatic control system.

[0006] The purpose of the present invention can be achieved through the following technical solutions:

[0007] A compressor unit lubrication cooling automatic control system, comprising a compressor temperature collection unit, the compressor temperature collection unit is used to collect the temperature of different parts of the compressor unit when it is running, and obtain the drive temperature and shell temperature of the compressor unit;

[0008] A data interaction analysis unit, which can perform quantitative analysis on the drive temperature and the shell temperature, and judge whether the current operating state of the compressor unit can meet the lubricating oil release requirement or judge whether the current drive temperature and the shell temperature of the compressor unit are within the normal operating range according to the analysis result;

[0009] A lubrication delivery control unit, which can generate a lubrication release request signal and receive a lubrication oil release signal to realize the release of the lubrication oil;

[0010] A cooling transport control unit, which is capable of controlling the operating power of the cooling structure of the compressor unit and adjusting the operating temperature of the compressor unit;

[0011] The lubrication collection unit can collect the noise during the operation of the compressor unit, judge the lubrication status of the compressor unit through noise filtering analysis, and send the judgment result to the lubrication delivery control unit, so as to complete the replenishment of the lubricating oil of the compressor unit through the lubrication delivery control unit.

[0012] As a preferred embodiment of the present invention, the noise determination process of the lubrication collection unit for the compressor unit is as follows:

[0013] The lubrication collection unit collects the operating noise and environmental noise of the compressor unit at the same time, performs environmental noise filtering on the collected noise, and obtains the mechanical noise of the compressor unit. The lubrication collection unit identifies the friction noise in the mechanical noise, and compares the friction noise with the preset noise threshold. If the noise threshold is greater than the preset noise threshold, a lubrication loss signal is generated. If the noise threshold is less than the preset noise threshold, no response is made. The lubrication collection unit sends the lubrication loss signal to the lubrication delivery control unit. After the lubrication delivery control unit obtains the lubrication loss signal, it generates a lubrication release request signal and resets the accumulated working time of the compressor unit.

[0014] As a preferred embodiment of the present invention, the lubrication delivery unit counts the cumulative working time of the compressor unit, compares the cumulative working time of the compressor unit with the preset lubrication maintenance interval, generates a lubrication release request signal if the cumulative working time of the compressor unit is greater than the lubrication maintenance interval, and sends the lubrication release request signal to the data interaction analysis unit. After the data interaction analysis unit obtains the lubrication release request signal, it compares the drive temperature of the compressor with the preset lubricant release temperature. If the drive temperature of the compressor is lower than the preset lubricant release temperature, a lubrication temperature insufficient signal is generated. If the drive temperature of the compressor is greater than or equal to the preset lubricant release temperature, a lubrication temperature qualified signal is generated.

[0015] After generating the lubrication temperature qualified signal, the data interaction analysis unit feeds back the lubrication temperature qualified signal to the lubrication delivery control unit. After acquiring the lubrication temperature qualified signal, the lubrication delivery control unit sends a contraction signal to the lubrication pump to control the lubrication pump to pump the lubricating oil into the bearings and gear structures that need to be lubricated in the compressor unit, thereby completing the lubrication oil replenishment for the compressor unit.

[0016] After the data interaction analysis unit generates a lubrication temperature insufficient signal, the data interaction analysis unit sends a cooling identification signal to the cooling delivery control unit. After the cooling delivery control unit obtains the cooling identification signal, it feeds back the cooling operation power to the data interaction analysis unit. The data interaction analysis unit calculates the difference between the driving temperature of the compressor unit and the preset lubricating oil release temperature, and records the difference as the temperature difference. The data interaction analysis unit obtains the power reduction value through formula analysis based on the temperature difference, the preset lubricating oil release temperature and the cooling operation power. The data interaction analysis unit sends the power reduction value to the cooling delivery control unit. The cooling delivery control unit executes the power reduction value, adjusts the cooling operation power downward by the power reduction value, and maintains the new cooling operation power.

[0017] The cooling delivery unit feeds back a cooling power reduction signal to the data interaction analysis unit. After the data interaction analysis unit obtains the cooling power reduction signal, it obtains the driving temperature of the new compressor unit in real time through the compressor temperature acquisition unit, and compares the driving temperature with the preset lubrication release temperature again until a lubrication temperature qualified signal is generated, and then sends it to the lubrication delivery control unit. If the data interaction analysis unit still does not generate a lubrication temperature qualified signal after obtaining the cooling power reduction signal for a predetermined time, the cooling power reduction signal is executed again until a lubrication temperature qualified signal is generated.

[0018] As a preferred embodiment of the present invention, after the data interaction analysis unit obtains the driving temperature and the shell temperature, the driving temperature is compared with the preset upper limit of the normal driving temperature. If the driving temperature is lower than the preset upper limit of the driving temperature, a normal driving temperature signal is generated; if the driving temperature is greater than or equal to the preset upper limit of the driving temperature, a high driving temperature signal is generated; the data interaction analysis unit compares the shell temperature with the preset normal shell temperature. If the shell temperature is lower than the preset normal shell temperature, a normal shell temperature signal is generated; if the shell temperature is greater than or equal to the preset normal shell temperature, a high shell temperature signal is generated.

[0019] As a preferred embodiment of the present invention, the data interaction analysis unit generates a heat dissipation abnormality signal after generating a shell temperature too high signal. The data interaction analysis unit generates a heat transfer abnormality signal after simultaneously generating a drive temperature too high signal and a shell temperature normal signal. The data interaction analysis unit generates a heat dissipation normal signal after simultaneously generating a drive temperature normal signal and a shell temperature normal signal.

[0020] As a preferred embodiment of the present invention, after generating a heat dissipation abnormality signal, the data interaction analysis unit sends the heat dissipation abnormality signal to the cooling transport control unit, and the cooling transport control unit obtains the cooling operation power through the air cooling mechanism. If the cooling operation power does not reach the maximum operation power, the cooling transport control unit controls the air cooling mechanism to increase the cooling operation power, and after increasing the cooling operation power, the generation of the heat dissipation normal signal or the heat dissipation abnormality signal is again supervised through the data interaction analysis unit. If the heat dissipation abnormality signal is still generated, the cooling operation power of the air cooling mechanism is increased again. If the heat dissipation normal signal is generated, the current cooling operation power is maintained.

[0021] After the data interaction analysis unit generates the heat dissipation abnormality signal, if the cooling operation power reaches the maximum operation power, an alarm reminder is generated.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] 1. In the present invention, during the operation of the compressor, the operating temperature of the compressor is monitored, and the lubricating oil release and cooling mechanism of the compressor are controlled according to the monitoring result to ensure the timeliness of the release of the lubricating oil required by the compressor, and at the same time ensure that the temperature of the compressor during the release of the lubricating oil can ensure the basic fluidity of the lubricating oil, increase the spreading speed of the lubricating oil, realize the automatic non-stop release of the lubricating oil, and avoid the impact of stopping to add lubricating oil on the operation of the compressor.

[0024] 2. In the present invention, the operating temperature of the compressor is regulated by a threshold value to prevent the operating temperature of the compressor from being too high, which may cause excessive fluidity of the lubricating oil, thereby improving the adhesion of the lubricating oil and ensuring the service life of key moving parts of the compressor.

[0025] 3. In the present invention, the operating noise of the compressor is monitored, and whether the lubricating oil of the compressor needs to be supplemented is determined through intelligent analysis, so as to avoid the compressor from running in the absence of lubricating oil and increase the service life of the compressor. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to facilitate understanding by those skilled in the art, the present invention is further described below with reference to the accompanying drawings.

[0027] Figure 1 is a system block diagram of the present invention;

[0028] Figure 2 It is a system flow chart of the present invention. DETAILED DESCRIPTION

[0029] The technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] Embodiment 1:

[0031] See also Figure 1 - Figure 2 As shown, a compressor unit lubrication cooling automatic control system includes a compressor temperature acquisition unit, a data interaction analysis unit, a lubrication delivery control unit, a cooling delivery control unit and a lubrication acquisition unit. The compressor temperature acquisition unit can acquire the drive temperature and shell temperature of the compressor unit, wherein the drive temperature of the compressor unit is the core temperature of the compressor unit drive component, and the shell temperature is the temperature at the highest point of the compressor unit shell. When acquiring the drive temperature and shell temperature of the compressor unit, the compressor temperature acquisition unit acquires the temperature of the drive component and the shell of the compressor unit through a patch-type temperature sensor, and the patch-type sensors are distributed on the drive component surface and the shell surface of the compressor unit.

[0032] The lubrication delivery control unit counts the cumulative working time of the compressor unit, and compares the cumulative working time of the compressor unit with the preset lubrication maintenance interval. If the cumulative working time of the compressor unit is greater than the lubrication maintenance interval, a lubrication release request signal is generated, and the lubrication release request signal is sent to the data interaction analysis unit. After the data interaction analysis unit obtains the lubrication release request signal, it retrieves the preset lubricant release temperature stored in the data interaction analysis unit, and compares the driving temperature of the compressor with the preset lubricant release temperature. If the driving temperature of the compressor is lower than the preset lubricant release temperature, a lubrication temperature insufficient signal is generated. If the driving temperature of the compressor is greater than or equal to the preset lubricant release temperature, a lubrication temperature qualified signal is generated.

[0033] After generating the lubrication temperature qualified signal, the data interaction analysis unit feeds back the lubrication temperature qualified signal to the lubrication delivery control unit. After obtaining the lubrication temperature qualified signal, the lubrication delivery control unit sends a contraction signal to the lubrication pump to control the lubrication pump to pump the lubricating oil into the bearings and gear structures that need to be lubricated in the compressor unit, so as to complete the lubrication oil replenishment of the compressor unit. At the same time, the lubricating oil replenishment should be pumped in during the operation of the compressor unit, so that the lubricating oil can diffuse to all required positions as the structure moves after entering from the pumping point, so as to realize the automatic release of the lubricating oil without stopping the machine, and avoid the impact of stopping to add lubricating oil on the operation of the compressor;

[0034] After the data interaction analysis unit generates a lubrication temperature insufficient signal, the data interaction analysis unit sends a cooling identification signal to the cooling delivery control unit. After the cooling delivery control unit obtains the cooling identification signal, it obtains the cooling operation power from the air cooling mechanism. After obtaining the feedback of the cooling operation power, the cooling operation power is fed back to the data interaction analysis unit. The data interaction analysis unit calculates the difference between the driving temperature of the compressor unit and the preset lubricating oil release temperature, and records the difference as the temperature difference A. The data interaction analysis unit records the feedback cooling operation power as B, and the preset lubricating oil release temperature as C. The power reduction value X is obtained through formula analysis. Among them, q is a preset weight coefficient, the data interaction analysis unit sends the power reduction value X to the cooling delivery control unit, the cooling delivery control unit executes the power reduction value X, reduces the cooling operation power by the power reduction value X, and maintains the new cooling operation power, and at the same time the cooling delivery unit feeds back a cooling power reduction signal to the data interaction analysis unit, after the data interaction analysis unit obtains the cooling power reduction signal, it obtains the new driving temperature of the compressor unit in real time through the compressor temperature acquisition unit, and compares the driving temperature with the preset lubrication release temperature again until a lubrication temperature qualified signal is generated, and then sends it to the lubrication delivery control unit, if the data interaction analysis unit still does not generate a lubrication temperature qualified signal after obtaining the cooling power reduction signal for a period of time, the cooling power reduction signal is executed again until a lubrication temperature qualified signal is generated.

[0035] Embodiment 2:

[0036] See also Figure 1 - Figure 2As shown, after the data interaction analysis unit obtains the drive temperature and the shell temperature, the drive temperature is compared with the preset upper limit of the normal drive temperature, wherein the upper limit of the normal drive temperature is the highest temperature to ensure that the lubricating oil has sufficient viscosity and film-forming properties on the moving parts of the compressor. If the drive temperature of the compressor is higher than the upper limit, the fluidity of the lubricating oil in the compressor will be too large, thereby causing the lubricating oil to lose its film-forming protection effect. If the drive temperature is lower than the preset upper limit of the drive temperature, a normal drive temperature signal is generated. If the drive temperature is greater than or equal to the preset upper limit of the drive temperature, a high drive temperature signal is generated. The data interaction analysis unit compares the shell temperature with the preset normal shell temperature. If the shell temperature is lower than the preset normal shell temperature, a normal shell temperature signal is generated. If the shell temperature is greater than or equal to the preset normal shell temperature, a high shell temperature signal is generated.

[0037] The data interaction analysis unit generates a heat dissipation abnormality signal as long as it generates a shell temperature over-high signal. The data interaction analysis unit generates a heat transfer abnormality signal after simultaneously generating a drive temperature over-high signal and a shell temperature normal signal. The data interaction analysis unit generates a heat dissipation normal signal after simultaneously generating a drive temperature normal signal and a shell temperature normal signal.

[0038] After generating the heat dissipation abnormality signal, the data interaction analysis unit sends the heat dissipation abnormality signal to the cooling transport control unit. The cooling transport control unit obtains the cooling operating power through the air cooling mechanism. If the cooling operating power does not reach the maximum operating power, the cooling transport control unit controls the air cooling mechanism to increase the cooling operating power. After increasing the cooling operating power, the data interaction analysis unit is used to monitor the generation of the heat dissipation normal signal or the heat dissipation abnormality signal again. If the heat dissipation abnormality signal is still generated, the cooling operating power of the air cooling mechanism is increased again. If the heat dissipation normal signal is generated, the current cooling operating power is maintained. After generating the heat dissipation abnormality signal, if the cooling operating power reaches the maximum operating power, the data interaction analysis unit generates an alarm reminder to remind the maintenance personnel to check or maintain the compressor unit in time to ensure the normal operation of the compressor unit, avoid the compressor unit temperature being too high, which may cause accelerated aging or damage to the equipment, and avoid the insufficient wear protection ability caused by the oil film being too thin due to the high temperature of the lubricating oil.

[0039] Embodiment 2:

[0040] See also Figure 1 - Figure 2As shown, the lubrication collection unit collects the operating noise of the compressor unit and the environmental noise at the same time, and performs environmental noise filtering on the collected noise to obtain the mechanical noise of the compressor unit. The lubrication collection unit identifies the friction noise in the mechanical noise, and compares the friction noise with the preset noise threshold. If the noise threshold is greater than the preset noise threshold, a lubrication loss signal is generated. If the noise threshold is less than the preset noise threshold, no response is made. The lubrication collection unit sends the lubrication loss signal to the lubrication delivery control unit. After the lubrication delivery control unit obtains the lubrication loss signal, it generates a lubrication release request signal and resets the accumulated working time of the compressor unit, thereby intelligently analyzing whether it is necessary to pump lubricating oil into the driving components of the compressor unit according to the degree of wear to ensure the working life of the compressor unit.

[0041] The preferred embodiments of the present invention disclosed above are only used to help explain the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to only specific implementation methods. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A compressor unit lubrication cooling automatic control system, characterized in that: It includes a compressor temperature collection unit, which is used to collect the temperatures of different parts of the compressor unit when it is running, and obtain the drive temperature and shell temperature of the compressor unit; A data interaction analysis unit, which can perform quantitative analysis on the drive temperature and the shell temperature, and judge whether the current operating state of the compressor unit can meet the lubricating oil release requirement and whether the current drive temperature and the shell temperature of the compressor unit are within the normal operating range according to the analysis result; A lubrication delivery control unit, wherein the lubrication delivery control unit is capable of generating a lubrication release request signal and sending the lubrication release request signal to the data interaction analysis unit. After the data interaction analysis unit obtains the lubrication release request signal, the drive temperature of the compressor is compared with a preset lubricant release temperature. If the drive temperature of the compressor is lower than the preset lubricant release temperature, a lubrication temperature insufficient signal is generated. If the drive temperature of the compressor is greater than or equal to the preset lubricant release temperature, a lubrication temperature qualified signal is generated. After generating the lubrication temperature qualified signal, the data interaction analysis unit feeds back the lubrication temperature qualified signal to the lubrication delivery control unit. After acquiring the lubrication temperature qualified signal, the lubrication delivery control unit sends a contraction signal to the lubrication pump to control the lubrication pump to pump the lubricating oil into the bearings and gear structures that need to be lubricated in the compressor unit, thereby completing the lubrication oil replenishment for the compressor unit. A cooling transport control unit, which is capable of controlling the operating power of the cooling structure of the compressor unit and adjusting the operating temperature of the compressor unit; A lubrication collection unit, wherein the lubrication collection unit can collect the noise during the operation of the compressor unit, judge the lubrication status of the compressor unit through noise filtering analysis, and send the judgment result to the lubrication delivery control unit, and complete the replenishment of the lubricating oil of the compressor unit through the lubrication delivery control unit. After the data interaction analysis unit obtains the drive temperature and the shell temperature, the drive temperature is compared with the preset upper limit of the normal drive temperature. If the drive temperature is less than the preset upper limit of the drive temperature, a normal drive temperature signal is generated. If the drive temperature is greater than or equal to the preset upper limit of the drive temperature, a high drive temperature signal is generated.

2. A compressor unit lubrication and cooling automatic control system according to claim 1, characterized in that: The noise determination process of the lubrication collection unit for the compressor unit is as follows: The lubrication collection unit collects the operating noise and environmental noise of the compressor unit at the same time, performs environmental noise filtering on the collected noise, and obtains the mechanical noise of the compressor unit. The lubrication collection unit identifies the friction noise in the mechanical noise, and compares the friction noise with the preset noise threshold. If the noise threshold is greater than the preset noise threshold, a lubrication loss signal is generated. If the noise threshold is less than the preset noise threshold, no response is made. The lubrication collection unit sends the lubrication loss signal to the lubrication delivery control unit. After the lubrication delivery control unit obtains the lubrication loss signal, it generates a lubrication release request signal and resets the accumulated working time of the compressor unit.

3. The automatic control system for lubrication and cooling of a compressor unit according to claim 1, characterized in that: The lubrication delivery control unit counts the cumulative working time of the compressor group, compares the cumulative working time of the compressor group with the preset lubrication maintenance interval, and generates a lubrication release request signal if the cumulative working time of the compressor group is greater than the lubrication maintenance interval; After the data interaction analysis unit generates a lubrication temperature insufficient signal, the data interaction analysis unit sends a cooling identification signal to the cooling delivery control unit. After the cooling delivery control unit obtains the cooling identification signal, it feeds back the cooling operation power to the data interaction analysis unit. The data interaction analysis unit calculates the difference between the driving temperature of the compressor unit and the preset lubricating oil release temperature, and records the difference as the temperature difference. The data interaction analysis unit obtains the power reduction value through formula analysis based on the temperature difference, the preset lubricating oil release temperature and the cooling operation power. The data interaction analysis unit sends the power reduction value to the cooling delivery control unit. The cooling delivery control unit executes the power reduction value, adjusts the cooling operation power downward by the power reduction value, and maintains the new cooling operation power. The cooling and delivery control unit feeds back a cooling power reduction signal to the data interaction analysis unit. After the data interaction analysis unit obtains the cooling power reduction signal, it obtains the driving temperature of the new compressor unit in real time through the compressor temperature acquisition unit, and compares the driving temperature with the preset lubrication release temperature again until a lubrication temperature qualified signal is generated, and then sends it to the lubrication delivery control unit. If the data interaction analysis unit still does not generate a lubrication temperature qualified signal after obtaining the cooling power reduction signal for a predetermined time, the cooling power reduction signal is executed again until a lubrication temperature qualified signal is generated.

4. A compressor unit lubrication and cooling automatic control system according to claim 1, characterized in that: The data interaction analysis unit compares the shell temperature with a preset normal shell temperature. If the shell temperature is lower than the preset normal shell temperature, a normal shell temperature signal is generated. If the shell temperature is greater than or equal to the preset normal shell temperature, a high shell temperature signal is generated.

5. A compressor unit lubrication and cooling automatic control system according to claim 4, characterized in that: After the data interaction analysis unit generates a shell temperature too high signal, it generates a heat dissipation abnormality signal. After the data interaction analysis unit simultaneously generates a drive temperature too high signal and a shell temperature normal signal, it generates a heat transfer abnormality signal. After the data interaction analysis unit simultaneously generates a drive temperature normal signal and a shell temperature normal signal, it generates a heat dissipation normal signal.

6. A compressor unit lubrication and cooling automatic control system according to claim 5, characterized in that: After generating the heat dissipation abnormality signal, the data interaction analysis unit sends the heat dissipation abnormality signal to the cooling transport control unit, and the cooling transport control unit obtains the cooling operation power through the air cooling mechanism. If the cooling operation power does not reach the maximum operation power, the cooling transport control unit controls the air cooling mechanism to increase the cooling operation power, and after increasing the cooling operation power, the data interaction analysis unit is used again to supervise the generation of the heat dissipation normal signal or the heat dissipation abnormality signal. If the heat dissipation abnormality signal is still generated, the cooling operation power of the air cooling mechanism is increased again. If the heat dissipation normal signal is generated, the current cooling operation power is maintained; After the data interaction analysis unit generates the heat dissipation abnormality signal, if the cooling operation power reaches the maximum operation power, an alarm reminder is generated.

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