Self-lubricating control device of roots mechanical equipment and roots mechanical equipment

Abstract

The utility model relates to the related technical field of roots mechanical equipment, and provides a self-lubricating control device of roots mechanical equipment and the roots mechanical equipment. The self-lubricating control device comprises an oil storage tank; an inlet of the oil conveying pipe is communicated to the oil storage tank; an outlet of the oil conveying pipe is communicated to a lubricating oil filling port of a shaft seal of the Roots mechanical equipment, so that the lubricating oil in the oil conveying pipe is sucked into the shaft seal by utilizing negative pressure formed in the Roots mechanical equipment in the rotating process; the valve assembly comprises an electromagnetic valve arranged on the oil conveying pipe and used for opening or closing the oil conveying pipe; the adjusting valve is arranged on the oil conveying pipe and used for adjusting the oil conveying speed of the oil conveying pipe. According to the self-lubricating control device, the lubricating oil is automatically pumped by utilizing the vacuum degree generated inside the Roots mechanical equipment when the Roots mechanical equipment runs, so that the shaft seal is filled, the shaft seal of the Roots mechanical equipment is automatically lubricated during production, the production continuity and reliability are guaranteed, and the working intensity of personnel is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field related to Roots mechanical equipment, in particular to a self-lubricating control device of Roots mechanical equipment and Roots mechanical equipment. Background Art

[0002] In the relevant technology, Roots pump, as an important dry mechanical pump, is widely used in petrochemical, pharmaceutical, metallurgical, electric power and other fields due to its advantages such as high efficiency, low noise and simple structure. For example, many existing steel mills have abandoned the steam pumps that used to use steam as the energy medium due to site and environmental protection requirements, and instead use dry mechanical pumps that use power as the energy medium for vacuuming. Roots pumps are often used as dry mechanical pump devices in steel mills in the metallurgical industry and are the core equipment for vacuuming. During the long-term operation of Roots pumps, the lubrication and sealing problems of the shaft seal have always been the key factors restricting its performance and service life. Therefore, when using dry mechanical pumps for continuous production, it is necessary to maintain the Roots pump faster, better and more effectively to ensure production efficiency.

[0003] However, the existing maintenance method of Roots pumps requires inspection personnel to regularly check the lubricating oil level. Every time the oil is changed or refueled, production needs to be stopped. This makes the maintenance of Roots pumps time-consuming and labor-intensive, has a great impact on production, and cannot meet the needs of continuous production. Utility Model Content

[0004] In view of this, the purpose of the present application is to provide a self-lubricating control device of a Roots mechanical equipment and a Roots mechanical equipment, so as to solve the technical problem that the lubricating oil filling method of the Roots mechanical equipment in the prior art is time-consuming and labor-intensive.

[0005] In order to achieve the above objectives, this application provides the following technical solutions:

[0006] First invention, the present application provides a self-lubricating control device for Roots mechanical equipment, comprising:

[0007] Oil storage tank;

[0008] An oil delivery pipe, the inlet of which is connected to the oil storage tank; the outlet of which is connected to the lubricating oil filling port of the shaft seal of the Roots mechanical device, so as to utilize the negative pressure formed in the Roots mechanical device during its rotation to suck the lubricating oil in the oil delivery pipe into the shaft seal;

[0009] The valve assembly comprises: a solenoid valve, which is arranged on the oil pipeline and is used to open or close the oil pipeline; and a regulating valve, which is arranged on the oil pipeline and is used to adjust the oil delivery speed of the oil pipeline.

[0010] According to some embodiments of the present application, the oil pipeline includes:

[0011] A main pipeline, one end of which forms the inlet of the oil pipeline and the other end of which extends along the arrangement direction of the plurality of Roots mechanical devices;

[0012] And a plurality of branch pipes are arranged along the extension direction of the main pipe, the inlets of the plurality of branch pipes are respectively connected to the main pipe, and the outlets of the plurality of branch pipes form the outlets of the oil delivery pipe and respectively correspond to the lubricating oil filling ports of the corresponding Roots mechanical equipment.

[0013] According to some embodiments of the present application, the valve assembly further includes:

[0014] A ball valve is arranged between the outlet of the oil storage tank and the inlet of the oil delivery pipe, and is used to open / close the outlet of the oil storage tank.

[0015] According to some embodiments of the present application, the valve assembly includes:

[0016] The plurality of solenoid valves are arranged on the plurality of branch pipes and correspond one to one with the plurality of branch pipes;

[0017] The plurality of regulating valves are arranged on the plurality of branch pipes and correspond one to one with the plurality of branch pipes.

[0018] According to some embodiments of the present application, the bottom of the oil storage tank is located higher than the refueling port of the shaft seal lubricating oil.

[0019] According to some embodiments of the present application, the self-lubricating control device further includes:

[0020] A detection component, used for detecting the temperature of a shaft seal of the Roots mechanical device;

[0021] The control module is used to control the opening and closing of the valve component according to the temperature detection result of the detection component.

[0022] According to some embodiments of the present application, the detection component includes:

[0023] A thermal imager, used to detect the temperature of the shaft seal of the Roots mechanical device;

[0024] or,

[0025] The temperature sensor is used to detect the temperature of the shaft seal of the Roots mechanical device.

[0026] According to some embodiments of the present application, the self-lubricating control device further includes:

[0027] A plurality of flow meters, arranged on the plurality of branch pipes and corresponding to the plurality of branch pipes one by one, for detecting the flow on the corresponding branch pipes;

[0028] Wherein, the control module is used to control the opening and closing of the valve component according to the temperature detection result of the detection component and the flow detection results of the multiple flow meters.

[0029] According to some embodiments of the present application, the oil storage tank is provided with a liquid level gauge and / or a liquid level observation window.

[0030] The second invention, the present application provides a Roots mechanical equipment, the Roots mechanical equipment comprising: the self-lubricating control device described in any one of the above embodiments.

[0031] In the above technical scheme, a self-lubricating control device for Roots mechanical equipment is provided, which utilizes the vacuum generated inside the Roots mechanical equipment when it is running to automatically extract the lubricating oil and fill the shaft seal, so as to realize automatic lubrication of the shaft seal of the Roots mechanical equipment during production, thereby ensuring production continuity and reliability and reducing the workload of personnel. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0033] Figure 1 is a schematic diagram of a self-lubricating control device according to an exemplary embodiment;

[0034] Figure 2 is a front view showing a connection state of a self-lubricating control device and a plurality of Roots mechanical devices according to an exemplary embodiment;

[0035] Figure 3 It is a top view showing a connection state of a self-lubricating control device and a plurality of Roots mechanical devices according to an exemplary embodiment.

[0036] In the figure: 10, self-lubricating control device; 101, oil storage tank; 102, oil pipeline; 1021, main pipeline; 1022, branch pipe; 103, valve assembly; 1031, solenoid valve; 1032, regulating valve; 20, Roots mechanical equipment. DETAILED DESCRIPTION

[0037] The present application is further described in detail below through the accompanying drawings and embodiments. Through these descriptions, the characteristics and advantages of the present application will become clearer and more specific.

[0038] The word "exemplary" is used exclusively herein to mean "serving as an example, embodiment, or illustration." Any embodiment described herein as "exemplary" is not necessarily to be construed as preferred or advantageous over other embodiments. Although various aspects of the embodiments are shown in the drawings, the drawings are not necessarily drawn to scale unless otherwise noted.

[0039] In addition, the technical features involved in different embodiments of the present application described below can be combined with each other as long as they do not conflict with each other.

[0040] In the related technology, Roots mechanical equipment includes Roots pumps and Roots blowers, etc. The shaft seal structure of traditional Roots mechanical equipment usually adopts mechanical seals or packing seals. These methods can ensure the sealing performance of the corresponding equipment body to a certain extent, but there are also some problems. Especially in terms of the supply of lubricating oil, the traditional shaft seal structure usually relies on manual regular addition of lubricating oil to ensure good lubrication and sealing effect of the shaft seal part. However, this method of manual addition of lubricating oil not only fails to meet the needs of continuous production, but also increases the labor intensity of operators, and it is difficult to ensure the accuracy and timeliness of lubricating oil addition, which easily leads to increased wear of the shaft seal part due to poor lubrication, and even causes leakage and other faults.

[0041] The present application provides a self-lubricating control device for Roots mechanical equipment, which utilizes the vacuum generated inside the Roots mechanical equipment when it is running to automatically extract lubricating oil and fill the shaft seal, so as to automatically lubricate the Roots pump shaft seal during production, ensure production continuity and reliability, and reduce the workload of personnel. In addition, the self-lubricating control device also has the advantages of simple structure, low cost, and easy maintenance, and can meet the needs of practical applications.

[0042] The technical solution of this embodiment is described in detail below in conjunction with the accompanying drawings. The following embodiments and implementation methods can be combined with each other if there is no conflict.

[0043] In an exemplary embodiment of the present utility model, a self-lubricating control device for a Roots mechanical device is provided. Figure 1 As shown, Figure 1 1 is a schematic diagram of a self-lubricating control device according to an exemplary embodiment. The self-lubricating control device 10 comprises: an oil storage tank 101, an oil delivery pipe 102, a valve assembly 103 and the like.

[0044] The inlet of the oil delivery pipe 102 is connected to the oil storage tank 101; the outlet of the oil delivery pipe 102 is connected to the lubricating oil filling port of the shaft seal of the Roots mechanical device 20, so as to use the negative pressure formed in the Roots mechanical device 20 during the rotation process to suck the lubricating oil in the oil delivery pipe 102 into the shaft seal. The valve assembly 103 includes: a solenoid valve 1031, which is arranged on the oil delivery pipe 102 and is used to open or close the oil delivery pipe 102; and a regulating valve 1032, which is arranged on the oil delivery pipe 102 and is used to adjust the oil delivery speed of the oil delivery pipe 102.

[0045] In this exemplary embodiment, taking the Roots mechanical equipment 20 as a Roots pump as an example, the oil storage tank 101 is connected to the shaft seal of the Roots pump; the staff operates or controls the electromagnetic valve 1031 to open, and adjusts the regulating valve 1032 to a suitable opening; when the Roots pump is started, negative pressure is formed in the pump body, and the lubricating oil is sucked to the shaft seal by the negative pressure, and the oil circuit formed by the oil delivery pipe 102 is controlled by the electromagnetic valve 1031, and the amount of lubricating oil is controlled by the regulating valve 1032 (such as a needle valve, etc.); when the lubricating oil is added to the appropriate amount, the regulating valve 1032 and the electromagnetic valve 1031 are controlled to be closed. The self-lubricating control device 10 can automatically perform timed and quantitative maintenance on the Roots pump, realize the addition of lubricating oil without stopping the machine, and reduce the work intensity of the inspection personnel while ensuring the reliability of the continuous production of the Roots pump. In addition, the automatic lubricating oil adding system for the shaft seal of the Roots pump of the Roots mechanical equipment 20 is simple in structure, low in cost, and easy to maintain, which is of great significance for improving the performance and service life of the Roots pump.

[0046] In some exemplary embodiments, Figure 2-Figure 3 As shown, considering that there may be multiple Roots mechanical devices 20, based on this, in order to reduce costs and facilitate maintenance, a self-lubricating control device 10 can be used to supply lubricating oil to multiple Roots mechanical devices 20. Exemplarily, the oil delivery pipe 102 includes: a main line 1021, one end of which forms the inlet of the oil delivery pipe 102, and the other end extends along the arrangement direction of the multiple Roots mechanical devices 20; and multiple branch pipes 1022 arranged along the extension direction of the main line 1021, the inlets of the multiple branch pipes 1022 are respectively connected to the main line 1021, and the outlets of the multiple branch pipes 1022 form the outlet of the oil delivery pipe 102 and correspond to the lubricating oil filling ports of the corresponding Roots mechanical devices 20.

[0047] In some exemplary embodiments, in order to facilitate the replacement and maintenance of the oil storage tank 101, a corresponding valve can be provided at the outlet of the oil storage tank 101. For example, the valve assembly 103 further includes: a ball valve (not shown in the figure), which is provided between the outlet of the oil storage tank 101 and the inlet of the oil delivery pipe 102, and is used to open / close the outlet of the oil storage tank 101. When tasks such as maintenance and replacement of the oil storage tank 101 or overhaul of the corresponding Roots mechanical equipment 20 are required, the ball valve can be closed, and the ball valve can be opened after the task is completed.

[0048] In some exemplary embodiments, Figure 1-Figure 3 As shown, considering that an oil storage tank 101 supplies lubricating oil to multiple Roots mechanical devices 20, in order to facilitate independent control of each Roots mechanical device 20, a pair of valve units can be respectively provided for the corresponding Roots mechanical device 20, wherein each pair of valve units includes a solenoid valve 1031 and a regulating valve 1032.

[0049] Specifically, the valve assembly 103 includes: a plurality of solenoid valves 1031, which are arranged on the plurality of branch pipes 1022 and correspond to the plurality of branch pipes 1022 one by one; and a plurality of regulating valves 1032, which are arranged on the plurality of branch pipes 1022 and correspond to the plurality of branch pipes 1022 one by one. When a single Roots mechanical device 20 needs to be supplemented with lubricating oil, the solenoid valve 1031 and the regulating valve 1032 on the corresponding branch pipe 1022 can be opened for individual replenishment.

[0050] In some exemplary embodiments, in order to facilitate the replenishment of lubricating oil to the Roots mechanical device 20, the design height of the oil storage tank 101 can also be optimized in combination with the principle of gravity. Exemplarily, the bottom position of the oil storage tank 101 is higher than the filling port of the shaft seal lubricating oil.

[0051] When the shaft seal of the Roots mechanical device 20 needs to be replenished with lubricating oil, the principle of negative pressure generated in the body during operation is utilized, combined with the effect of gravity, so that the shaft seal is automatically filled with lubricating oil. The self-lubricating control device 10 does not need to be equipped with a separate lubricating oil supply pump, which can save equipment costs and reduce space occupation.

[0052] In some exemplary embodiments, in order to further improve the degree of automation of the self-lubricating control device 10, a control module and a detection module may be provided to realize the fully automatic replenishment of the shaft seal lubricating oil of the Roots mechanical device 20. Exemplarily, the self-lubricating control device 10 further includes: a detection component (not shown in the figure) for detecting the temperature at the shaft seal of the Roots mechanical device 20; and a control module (not shown in the figure) for controlling the opening and closing of the valve component 103 according to the temperature detection result of the detection component.

[0053] In this embodiment, a lubricating oil replenishing working process of the self-lubricating control device 10 is also introduced. Specifically, a certain amount of lubricating oil is first added to the oil storage tank 101; the plug at the end of the oil delivery pipe 102 (the end close to the shaft seal of the Roots mechanical device 20) is opened to vent and empty the oil delivery pipe 102; the vacuum system is started, and the solenoid valve 1031 is opened when the Roots mechanical device 20 is started, and the lubricating oil is sucked to the shaft seal by negative pressure; the solenoid valve 1031 is closed after opening for 5-10 seconds (the switching time of the solenoid valve 1031 is adjustable), and the flow of the lubricating oil is controlled by the needle valve at the same time. During the opening process of the solenoid valve 1031, the vacuum degree generated inside the body when the Roots mechanical device 20 is running is used to automatically extract the lubricating oil and fill the shaft seal, so as to realize automatic lubrication of the Roots pump shaft seal during production, ensure production continuity and reliability, and reduce the workload of personnel.

[0054] It should be noted that, since room temperature changes can affect the fluidity of the lubricating oil, setting a needle valve to control the flow of the lubricating oil in the oil delivery pipe 102 can avoid the situation where the lubricating oil is wasted due to excessive lubricating oil or the lubricating effect is poor due to insufficient filling. During the process of replenishing the lubricating oil to the Roots mechanical equipment 20, the opening and closing interval of the battery valve and the opening size of the regulating valve 1032 (i.e., the needle valve) can be adjusted and set according to actual conditions, which will not be repeated here.

[0055] In some exemplary embodiments, Figure 1-Figure 3 As shown, the detection component includes: a thermal imager for detecting the temperature of the shaft seal of the Roots mechanical device 20; or a temperature sensor for detecting the temperature of the shaft seal of the Roots mechanical device 20.

[0056] In some exemplary embodiments, Figure 1-Figure 3 As shown, in order to ensure that the amount of lubricating oil added is more accurate, the added flow rate can also be controlled by setting a flow meter. Exemplarily, the self-lubricating control device 10 also includes: multiple flow meters, which are arranged on multiple branch pipes 1022 and correspond to multiple branch pipes 1022 one by one, and are used to detect the flow on the corresponding branch pipes 1022. The control module is used to control the opening and closing of the valve assembly 103 according to the temperature detection results of the detection assembly and the flow detection results of multiple flow meters. In this embodiment, the switch control of the battery valve is realized based on the detection of the flow rate, so as to accurately control the lubricating oil supply amount.

[0057] It should be noted that if the negative pressure inside the Roots mechanical equipment 20 is relatively large, the lubricating oil will be added too quickly, causing the lubricating oil in the shaft seal to increase instantly, and leakage may occur at the shaft seal. In this embodiment, the lubricating oil replenishment speed is adjusted by regulating the regulating valve 1032, which can effectively avoid the above situation.

[0058] In some exemplary embodiments, considering that the staff needs to regularly obtain the amount of oil in the oil tank 101, the oil tank 101 can also be optimized. Exemplarily, the oil tank 101 is provided with a liquid level meter and / or a liquid level observation window. In this embodiment, the staff can determine the amount of lubricating oil in the oil tank 101 through the liquid level meter or the liquid level observation window when regularly checking the oil tank 101, so as to avoid the problem of being unable to replenish the Roots mechanical device 20 due to lack of lubricating oil in the oil tank 101.

[0059] In addition, a low liquid level alarm device may be provided for the oil storage tank 101. When the liquid level detection component in the oil storage tank 101 detects that the amount of lubricating oil is low, the low liquid level alarm device sounds an alarm to prompt the staff to refuel.

[0060] In an exemplary embodiment of the utility model, a Roots mechanical device 20 is also provided, and the Roots mechanical device 20 includes: any one of the above-mentioned self-lubricating control devices 10. The self-lubricating control device 10 is installed near the body of the Roots mechanical device 20, and is responsible for automatically refueling and lubricating the Roots mechanical device 20. Since the oil storage tank 101 of the self-lubricating control device 10 is connected to the lubricating oil refueling port of the Roots mechanical device 20 through the oil delivery pipe 102 and accessories, the oil delivery pipe 102 is equipped with a solenoid valve 1031 to control the start and stop of refueling, and is also equipped with a needle valve to control the amount of refueling, the vacuum degree generated inside the body of the Roots mechanical device 20 when it is running can be used to automatically extract the lubricating oil and fill the shaft seal.

[0061] The self-lubricating control device 10 is equipped with an automatic control design, which can match the operating conditions of the Roots mechanical equipment 20, so that the refueling amount is always in a reasonable state. The self-lubricating control device 10 occupies a small space, and can be installed in a pump room that has been arranged, so as to achieve the purpose of reducing costs and increasing efficiency; and the self-lubricating control device 10 is safe and reliable. By using the self-lubricating control device 10, refueling and lubrication can be completed even during the operation of the Roots mechanical equipment 20, ensuring the continuity of production.

[0062] In the description of the present application, it should be noted that the terms "upper", "lower", "inside", "outside", "front", "back", "left", "right", etc. indicate directions or positional relationships based on the directions or positional relationships in the working state of the present application. They are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they should not be understood as limitations on the present application.

[0063] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "install", "connect" and "connect" should be understood in a broad sense. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0064] The present application has been described above in conjunction with preferred embodiments, but these embodiments are only exemplary and serve only as an illustration. On this basis, various replacements and improvements may be made to the present application, all of which fall within the scope of protection of the present application.

Claims

1. A self-lubricating control device for Roots mechanical equipment, characterized in that: include: Oil storage tank; An oil delivery pipe, the inlet of which is connected to the oil storage tank; the outlet of which is connected to the lubricating oil filling port of the shaft seal of the Roots mechanical device, so as to utilize the negative pressure formed in the Roots mechanical device during its rotation to suck the lubricating oil in the oil delivery pipe into the shaft seal; The valve assembly includes: a solenoid valve, which is arranged on the oil pipeline and is used to open or close the oil pipeline; The regulating valve is arranged on the oil pipeline and is used for regulating the oil delivery speed of the oil pipeline.

2. The self-lubricating control device of Roots mechanical equipment according to claim 1, characterized in that: The oil pipeline comprises: A main pipeline, one end of which forms the inlet of the oil pipeline and the other end of which extends along the arrangement direction of the plurality of Roots mechanical devices; And a plurality of branch pipes are arranged along the extension direction of the main pipe, the inlets of the plurality of branch pipes are respectively connected to the main pipe, and the outlets of the plurality of branch pipes form the outlets of the oil delivery pipe and respectively correspond to the lubricating oil filling ports of the corresponding Roots mechanical equipment.

3. The self-lubricating control device of Roots mechanical equipment according to claim 2, characterized in that: The valve assembly further comprises: A ball valve is arranged between the outlet of the oil storage tank and the inlet of the oil delivery pipe, and is used to open / close the outlet of the oil storage tank.

4. The self-lubricating control device of Roots mechanical equipment according to claim 2, characterized in that: The valve assembly comprises: The plurality of solenoid valves are arranged on the plurality of branch pipes and correspond one to one with the plurality of branch pipes; The plurality of regulating valves are arranged on the plurality of branch pipes and correspond one to one with the plurality of branch pipes.

5. The self-lubricating control device of Roots mechanical equipment according to claim 1, characterized in that: The bottom position of the oil storage tank is higher than the filling port of the shaft seal lubricating oil.

6. The self-lubricating control device of Roots mechanical equipment according to any one of claims 1 to 5, characterized in that: The self-lubricating control device also includes: A detection component, used for detecting the temperature of a shaft seal of the Roots mechanical device; The control module is used to control the opening and closing of the valve component according to the temperature detection result of the detection component.

7. The self-lubricating control device of Roots mechanical equipment according to claim 6, characterized in that: The detection component comprises: A thermal imager, used to detect the temperature of the shaft seal of the Roots mechanical device; or, The temperature sensor is used to detect the temperature of the shaft seal of the Roots mechanical device.

8. The self-lubricating control device of Roots mechanical equipment according to claim 6, characterized in that: The self-lubricating control device also includes: A plurality of flow meters, arranged on a plurality of branch pipes in the oil pipeline and corresponding to the plurality of branch pipes one by one, for detecting flow rates on the corresponding branch pipes; Wherein, the control module is used to control the opening and closing of the valve component according to the temperature detection result of the detection component and the flow detection results of the multiple flow meters.

9. The self-lubricating control device of Roots mechanical equipment according to claim 6, characterized in that: The oil storage tank is provided with a liquid level gauge and / or a liquid level observation window.

10. A Roots mechanical device, characterized in that: The Roots mechanical equipment includes: the self-lubricating control device according to any one of claims 1-9.

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