Mechanical seal cooling system

Abstract

The invention relates to a mechanical seal cooling system which is characterized in that a shell cavity is formed in a shell; the static ring seat is connected with the shell and is provided with a liquid inlet hole; the rotating shaft penetrates through the shell cavity and is rotationally connected with the static ring seat; the sealing friction pair comprises a static ring and a movable ring, the static ring is fixedly connected with the static ring seat, a drainage hole is formed in the static ring, and the liquid inlet hole is communicated with the shell cavity through the drainage hole; the movable ring abuts against the static ring, the movable ring is arranged on the periphery of the rotating shaft and rotates relative to the static ring along with the rotating shaft, and liquid output by the drainage hole can flush the movable ring. The temperature sensor is contacted with the static ring; the pH value sensor is arranged in the shell cavity; the interior of the liquid supply assembly communicates with the shell cavity through the liquid inlet hole and the drainage hole, and the liquid supply assembly adjusts the liquid supply flow according to parameters obtained by the temperature sensor and adjusts the liquid pH value of supplied liquid according to parameters obtained by the pH value sensor. The sealing end face can be effectively prevented from scaling, the water consumption for cooling the sealing end face is effectively reduced, and the purpose of saving water is achieved.

Description

Technical Field

[0001] The present application relates to the technical field of mechanical seals, and in particular to a mechanical seal cooling system. Background Art

[0002] With the development of machining technology, mechanical seals have emerged. Mechanical seals achieve sealing effects by sealingly connecting different mechanical components, improving equipment efficiency. A mechanical seal structure typically consists of a stationary housing, a rotating rotor, and a cooling device. The housing and rotor are sealed together to form a sealing end face. During operation, the cooling device needs to supply cooling liquid to the sealing end face, thereby achieving heat dissipation, lubrication, and cleaning, ensuring stable operation of the seal structure.

[0003] In the related art, local tap water or industrial water is directly injected into the sealing surface to flush and cool the sealing end surface, and a large amount of water is injected to ensure that the temperature of the sealing end surface is maintained at a low level.

[0004] However, while tap water or industrial water, while a relatively simple way to obtain water, can contain a high concentration of impurities or crystalline particles. Long-term use of tap water or industrial water can lead to scaling on the seal face, reducing the cooling effect and even causing wear and failure. Furthermore, because users cannot directly access the seal face's temperature, large amounts of water injection are often required to maintain a low temperature, resulting in water waste. This makes it difficult to effectively utilize water resources in areas where water resources are scarce. Summary of the Invention

[0005] Based on this, it is necessary to provide a mechanical seal structure that can effectively prevent scaling of the sealing end face and save water in order to solve the above-mentioned problems of scaling of the sealing end face and water waste.

[0006] In one aspect, the present application provides a mechanical seal cooling system, comprising:

[0007] A shell body, with a shell cavity inside;

[0008] A stationary ring seat is connected to the housing and is provided with a liquid inlet hole;

[0009] A rotating shaft is provided in the shell cavity and is rotatably connected to the stationary ring seat;

[0010] A sealing friction pair includes a stationary ring and a dynamic ring, wherein the stationary ring is fixedly connected to the stationary ring seat, the stationary ring has a first annular surface and a second annular surface opposite to each other, the stationary ring is provided with a drainage hole penetrating the first annular surface and the second annular surface, and the liquid inlet is connected to the shell cavity through the drainage hole; the dynamic ring is sealingly abutted against the first annular surface of the stationary ring, the dynamic ring is arranged around the outer periphery of the rotating shaft and moves relative to the stationary ring with the rotating shaft, and the liquid output from the drainage hole can flush the dynamic ring;

[0011] a temperature sensor, in contact with the static ring and used to obtain the temperature of the static ring;

[0012] A pH sensor is disposed in the shell cavity and is used to detect the pH of the liquid in the shell cavity;

[0013] A liquid supply component is connected to the liquid inlet, and is used to supply liquid to the shell cavity through the liquid inlet and the drainage hole; the liquid supply component is configured to: adjust the liquid supply flow rate according to the temperature obtained by the temperature sensor, and adjust the pH of the liquid supplied to the shell cavity according to the pH value of the liquid obtained by the pH sensor.

[0014] In some embodiments, the minimum pore size of the liquid inlet is larger than the minimum pore size of the drainage hole.

[0015] In some embodiments, a guide groove is provided on the side wall where the static ring and the dynamic ring abut against each other, and the drainage hole is provided on the bottom wall of the guide groove.

[0016] In some embodiments, the mechanical seal cooling system further includes an abutment assembly, which is sleeved on the outer circumference of the rotating shaft and the dynamic ring, and abuts against the side wall of the dynamic ring facing away from the static ring.

[0017] In some embodiments, the abutment assembly includes a dynamic ring seat, a fixing screw and a spring. The dynamic ring seat is sleeved on the outer circumference of the rotating shaft and the dynamic ring, and a threaded hole is opened on the surface. The fixing screw is threadedly connected to the threaded hole and inserted into the rotating shaft; one end of the spring is connected to the dynamic ring seat, and the other end of the spring abuts against the dynamic ring.

[0018] In some embodiments, the abutment assembly further includes a first sealing ring and a second sealing ring, wherein the first sealing ring is disposed between the dynamic ring seat and the rotating shaft, and the second sealing ring is disposed between the dynamic ring seat and the dynamic ring.

[0019] In some embodiments, the liquid supply assembly includes a water storage chamber, an acid chamber, an alkali chamber, a first valve, a second valve and a third valve. The water storage chamber, the first valve and the liquid inlet are connected in sequence, and the first valve is used to control the water storage chamber to supply liquid to the liquid inlet; the acid chamber, the second valve and the liquid inlet are connected in sequence, and the second valve is used to control the acid chamber to supply liquid to the liquid inlet; the alkali chamber, the third valve and the liquid inlet are connected in sequence, and the third valve is used to control the alkali chamber to supply liquid to the liquid inlet.

[0020] In some embodiments, the liquid supply assembly further includes a pressure regulating valve, and the first valve, the second valve, and the third valve are all connected to the pressure regulating valve.

[0021] In some embodiments, the liquid supply assembly further includes a pressure transmitter, which is communicated with the pressure regulating valve and is used to detect the pressure of the liquid processed by the pressure regulating valve.

[0022] In some embodiments, the liquid supply assembly further includes a one-way valve, and the first valve, the second valve, and the third valve are all connected to the one-way valve. The above-mentioned mechanical seal cooling system includes a housing, a stationary ring seat, a sealing friction pair, and a rotating shaft, wherein the housing is connected to the stationary ring seat, and the rotating shaft is rotatably connected to the stationary ring seat so that the rotating shaft can rotate relative to the housing to ensure that the rotating shaft can rotate to achieve the corresponding processing function. The interior of the housing is provided with a shell cavity, and the stationary ring seat is provided with a liquid inlet hole. The stationary ring of the sealing friction pair is provided in the shell cavity and fixedly connected to the stationary ring seat. The shell cavity inside the housing is connected to the outside of the housing through the drainage hole on the stationary ring and the liquid inlet hole on the stationary ring seat. The dynamic ring abuts against the static ring to form a sealing structure in the shell cavity. The contact surface between the dynamic ring and the stationary ring is a sealing end face. The liquid inside the liquid supply component enters the shell cavity through the liquid inlet hole and the drainage hole. The drainage hole is set corresponding to the dynamic ring, so that the liquid provided by the liquid supply component can flow through the sealing end face. According to the detection value of the pH sensor, the liquid of the corresponding pH is injected to remove impurities such as crystals and scale on the sealing end face. The dynamic ring rotates relative to the static ring, and the outer periphery of the dynamic ring can contact the liquid passing through the drainage hole to ensure that the sealing end face does not scale. At the same time, the liquid cools the sealing end face. The liquid supply component adjusts the time interval of the liquid supply and the duration of the liquid supply process in real time according to the temperature value detected by the temperature sensor. It can reduce the water consumption while ensuring that the temperature of the sealing end face is at a reasonable level, so as to achieve the purpose of water saving. Through the above-mentioned settings, it is possible to effectively prevent scaling at the sealing end face and effectively reduce the water consumption for cooling the sealing end face, so as to achieve the purpose of water saving. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1This is a schematic diagram of the overall structure of an embodiment of a mechanical seal cooling system of the present application.

[0024] Figure 2 This is a schematic structural diagram of a mechanical seal structure of an embodiment of a mechanical seal cooling system of the present application.

[0025] Figure 3 for Figure 2 Enlarged view of point A in the middle.

[0026] Figure 4 This is a front view of a stationary ring in an embodiment of a mechanical seal cooling system of the present application.

[0027] Figure 5 This is a front view of a stationary ring seat in an embodiment of a mechanical seal cooling system of the present application.

[0028] In the figure, 100, shell; 110, shell cavity; 200, stationary ring seat; 210, liquid inlet hole; 220, first stationary ring seat assembly; 230, second stationary ring seat assembly; 300, rotating shaft; 400, sealing friction pair; 410, stationary ring; 411, drainage hole; 412, guide groove; 420, dynamic ring; 430, third sealing ring; 500, liquid supply assembly; 510, water storage chamber; 520, acid liquid chamber; 530, alkali liquid chamber; 540, first valve; 550, second valve; 560, third valve; 570, pressure regulating valve; 580, pressure transmitter; 590, one-way valve; 600, abutment assembly; 610, dynamic ring seat; 620, spring; 630, threaded hole; 640, first sealing ring; 650, second sealing ring. DETAILED DESCRIPTION

[0029] To make the above-mentioned objects, features, and advantages of the present application more clearly understood, the specific embodiments of the present application are described in detail below with reference to the accompanying drawings. The following description sets forth many specific details to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways than those described herein, and those skilled in the art can make similar improvements without violating the scope of the present application. Therefore, the present application is not limited to the specific embodiments disclosed below.

[0030] In the description of this application, it should be understood that if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing this application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.

[0031] In addition, if the terms "first" or "second" appear, these terms are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of technical features indicated. Therefore, a feature specified as "first" or "second" may explicitly or implicitly include at least one of such features. In the description of this application, if the term "plurality" appears, "plurality" means at least two, for example, two, three, etc., unless otherwise specifically defined.

[0032] In this application, unless otherwise specified or limited, the terms "mounted," "connected," "connected," "fixed," etc., should be interpreted broadly. For example, these terms may refer to fixed connections, removable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediary; and internal communication between two components or interaction between two components, unless otherwise specified. Those skilled in the art will understand the specific meanings of these terms in this application based on the specific circumstances.

[0033] In this application, unless otherwise expressly specified or limited, if a first feature is described as being "above" or "below" a second feature, or similar descriptions, this may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Furthermore, when a first feature is described as being "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is described as being "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0034] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element. If an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. If any, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in this application are for illustrative purposes only and do not represent the only embodiment.

[0035] See Figure 1 、 Figure 2 and Figure 3 , Figure 1 FIG. 1 shows a schematic diagram of the overall structure of a mechanical seal cooling system in an embodiment of the present application. Figure 2 A schematic structural diagram of a mechanical seal structure in a mechanical seal cooling system in one embodiment of the present application is shown; Figure 3 Shown Figure 2 A partial enlarged view of point A in the middle; it should be noted here that, Figure 1 The figure only shows the connection method and sequence of the liquid supply assembly 500 and does not represent its specific structure. One embodiment of the present application provides a mechanical seal cooling system, including a housing 100, a stationary ring seat 200, a rotating shaft 300, a sealing friction pair 400, a temperature sensor (not shown), a pH sensor (not shown), and a liquid supply assembly 500. Among them, the shell 100 is provided with a shell cavity 110; the static ring seat 200 is connected to the shell 100, and the static ring seat 200 is provided with a liquid inlet hole 210; the rotating shaft 300 is provided in the shell cavity 110 and is rotatably connected to the static ring seat 200; the sealing friction pair 400 includes a static ring 410 and a dynamic ring 420, the static ring 410 is fixedly connected to the static ring seat 200, the static ring 410 has a first annular surface and a second annular surface opposite to each other, the static ring 410 is provided with a drainage hole 411 that passes through the first annular surface and the second annular surface, and the liquid inlet hole 210 is connected to the shell cavity 110 through the drainage hole 411; the dynamic ring 420 is sealed against the first annular surface of the static ring 410, and the dynamic ring 420 is arranged around the rotating shaft 300 The outer periphery of the shell 110 and moves with the rotating shaft 300 relative to the static ring 410, and the liquid output by the drainage hole 411 can flow to the dynamic ring 420; the temperature sensor is in contact with the static ring 410 and is used to obtain the temperature of the static ring 410; the pH sensor is arranged in the shell cavity 110 and is used to detect the pH of the liquid in the shell cavity 110; the liquid supply component 500 is connected to the liquid inlet hole 210, and the liquid supply component 500 is used to supply liquid to the shell cavity 110 through the liquid inlet hole 210 and the drainage hole 411; the liquid supply component 500 is configured to: be able to adjust the liquid supply flow rate according to the temperature obtained by the temperature sensor, and adjust the pH of the liquid supplied to the shell cavity 110 according to the pH of the liquid obtained by the pH sensor.

[0036] The stationary ring seat 200 can be made of a connecting flange, a connecting ring, or a connecting structure made of the same material as the housing 100. It only needs to ensure that the stationary ring seat 200 can be connected to the housing 100. Figure 1 、 Figure 2 and Figure 3 Preferably, the stationary ring seat 200 uses a connection structure made of the same material as the housing 100. The stationary ring seat 200 is connected to the housing 100 via screws. The sealing friction pair 400 is sealed to the housing 100. The rotating shaft 300 is sealed to the sealing friction pair 400 or sealed to the sealing friction pair 400 via other sealing structures. The housing cavity 110 is enclosed by the housing 100, the stationary ring seat 200, the sealing friction pair 400, and the rotating shaft 300. The sealing friction pair 400 includes a stationary ring 410 and a dynamic ring 420. The stationary ring 410 is fixedly connected to the stationary ring seat 200. The dynamic ring 420 abuts against the stationary ring 410 and rotates with the rotating shaft 300. That is, when the rotating shaft 300 rotates, the dynamic ring 420 moves relative to the stationary ring 410. A drainage hole 411 is provided on the stationary ring 410, and a liquid inlet hole 210 is provided on the stationary ring seat 200. The liquid inlet hole 210 and the drainage hole 411 are connected to form a liquid inlet waterway. The liquid provided by the liquid supply assembly 500 can enter the shell cavity 110 through the liquid inlet hole 210 and the drainage hole 411. The liquid passing through the drainage hole 411 can flow through the sealing end surface where the stationary ring 410 contacts the dynamic ring 420, thereby cooling the sealing end surface (dynamic ring 420 and stationary ring 410). The pH of the liquid flowing through the drainage hole 411 can be adjusted according to the chemical properties of the scale or crystals on the sealing end surface to remove the corresponding scale or crystals. For example, if the scale is calcium carbonate or magnesium carbonate, an acidic liquid such as hydrochloric acid can be added to the liquid passing through the liquid inlet hole 210 to remove alkaline scale or alkaline crystals in the liquid inlet waterway. By providing temperature and pH sensors, the liquid supply and pH can be adjusted based on the values ​​detected by the sensors, ensuring that the desired cooling and descaling effects are achieved while reducing water consumption. Furthermore, the shaft 300 passes through the housing 110, and the liquid entering the housing 110 can come into contact with the shaft 300, which can cool the shaft 300 to a certain extent.

[0037] like Figure 3 As shown, it should be noted here that the first annular surface refers to the side wall of the static ring 410 that abuts against the side wall of the static ring seat 200 on which the liquid inlet hole 210 is opened, and the second annular surface refers to the side wall of the static ring 410 that contacts the dynamic ring 420, so that the liquid inlet hole 210 and the drainage hole 411 are both arranged in the horizontal direction.

[0038] During operation, the rotating shaft 300 rotates, and the dynamic ring 420 rotates with the rotating shaft 300 relative to the static ring 410. The liquid supply assembly 500 supplies liquid to the liquid inlet 210. The liquid flows through the liquid inlet 210 and the drainage hole 411 into the shell cavity 110, thereby cooling the area where the liquid flows. When the temperature sensor detects that the temperature at the static ring 410 is too high, the liquid supply assembly 500 increases the liquid supply to improve the cooling effect and ensure that the operating temperature of the device is at a lower level. Conversely, when the temperature sensor detects that the temperature at the static ring 410 is low, the liquid supply assembly 500 reduces the liquid supply to appropriately reduce the cooling effect. It is only necessary to ensure that the temperature does not exceed the preset value. This ensures the cooling effect while reducing water consumption. When the pH sensor detects that the pH is higher than a predetermined value, the liquid supply component 500 provides an acidic liquid to remove alkaline scale or crystals; on the contrary, when the pH sensor detects that the pH is lower than a predetermined value, the liquid supply component 500 provides an alkaline liquid to reduce the acidity of the liquid in the shell cavity 110 to prevent the liquid in the shell cavity 110 from corroding metal structures such as the shell 100 and the rotating shaft 300.

[0039] It should be noted here that since the static ring 410 moves relative to the dynamic ring 420, more heat is generated relative to other positions, that is, the temperature at the static ring 410 is higher than that at other positions. By setting a temperature sensor at the static ring 410, the overall temperature level of the mechanical seal cooling system can be better known, thereby more reasonably controlling the liquid supply of the liquid supply component 500. In addition, scale and crystals are usually attached to the inner wall of the liquid inlet waterway. When the liquid provided by the liquid supply component 500 flows through the liquid inlet waterway, part of the scale or crystals dissolves or falls into the liquid, making the liquid alkaline. The scale or crystals enter the shell cavity 110 along with the liquid. Therefore, by setting a pH sensor in the shell cavity 110, it is possible to determine whether scale and crystals exist by detecting the pH of the liquid.

[0040] Through the above configuration, liquid supply assembly 500 can adjust the pH of the supplied liquid in real time based on the pH sensor's detection structure, effectively removing scale and crystals from the seal end face. Furthermore, liquid supply assembly 500 can adjust the liquid supply in real time based on the temperature sensor's monitoring data, ensuring the mechanical seal cooling system maintains a reasonable temperature while reducing water consumption, thereby achieving water conservation.

[0041] Furthermore, in some embodiments, a single liquid inlet 210 is provided, and a drainage hole 411 is provided corresponding to the liquid inlet 210. Since the dynamic ring 420 rotates relative to the stationary ring 410, the acid and alkali liquids flowing toward the sealing end face through the liquid inlet 210 and the drainage hole 411 can also fully contact the dynamic ring 420, achieving the desired effect. Multiple drainage holes 411 are provided, and are evenly spaced around the center of the stationary ring 410. This allows the liquid introduced through the drainage holes 411 to fully cool the stationary ring 410 while also evenly distributing the introduced liquid.

[0042] In some embodiments, the minimum aperture of the liquid inlet 210 is larger than the minimum aperture of the drainage hole 411 .

[0043] Preferably, both the liquid inlet hole 210 and the drainage hole 411 are tapered holes, and the minimum aperture of the liquid inlet hole 210 is larger than the minimum aperture of the drainage hole 411, so that the flow rate of the liquid increases after flowing from the liquid inlet hole 210 into the drainage hole 411, which can appropriately improve the effect of liquid flushing the sealing end face.

[0044] In some embodiments, a guide groove 412 is formed on the side wall where the static ring 410 and the dynamic ring 420 abut against each other, and the drainage hole 411 is provided on the bottom wall of the guide groove 412 .

[0045] See Figure 3 and Figure 4 Preferably, the guide groove 412 is opened on the second annular surface of the static ring 410 and is provided corresponding to the drainage hole 411. When in use, the liquid provided by the liquid supply component 500 flows to the side of the second annular surface of the static ring 410 through the drainage hole 411, and the liquid flows through the side wall of the dynamic ring 420. After the liquid flushes the dynamic ring 420, it flows along the guide groove 412 toward the edge of the dynamic ring 420, and finally flows into the shell cavity 110. By providing the guide groove 412, the liquid in the drainage hole 411 can flow along the edge of the dynamic ring 420, thereby fully contacting the side wall of the dynamic ring 420, improving the descaling effect, and the liquid finally enters the shell cavity 110.

[0046] In some embodiments, the mechanical seal cooling system further includes an abutment assembly 600 , which is sleeved on the outer periphery of the rotating shaft 300 and the dynamic ring 420 , and abuts against the side wall of the dynamic ring 420 facing away from the static ring 410 .

[0047] See Figure 2 and Figure 3 Preferably, the abutment assembly 600 is fixedly connected to the outer periphery of the rotating shaft 300 and rotates with the rotating shaft 300. The abutment assembly 600 is also connected to the movable ring 420, driving the movable ring 420 to rotate with the rotating shaft 300. The abutment assembly 600 abuts against the side wall of the movable ring 420 facing away from the stationary ring 410, so that the movable ring 420 and the stationary ring 410 fit tightly together, ensuring the reliability of the sealing end face.

[0048] In some embodiments, the abutment assembly 600 includes a dynamic ring seat 610, a fixing screw and a spring 620. The dynamic ring seat 610 is sleeved on the outer periphery of the rotating shaft 300 and the dynamic ring 420, and a threaded hole 630 is opened on the surface. The fixing screw is threadedly connected to the threaded hole 630 and inserted into the rotating shaft; one end of the spring 620 is connected to the dynamic ring seat 610, and the other end of the spring 620 abuts against the dynamic ring 420.

[0049] See Figure 2 and Figure 3 Preferably, the dynamic ring seat 610 is sleeved around the outer circumference of the rotating shaft 300 and the dynamic ring 420, driving the dynamic ring 420 to rotate with the rotating shaft 300. The surface of the dynamic ring seat 610 is provided with a plurality of equally spaced threaded holes 630. Set screws are inserted into the threaded holes 630 and threadedly connected to the inner sidewalls of the threaded holes 630. The set screws are inserted into the rotating shaft 300, and the dynamic ring seat 610 is fixedly connected to the rotating shaft 300 via the set screws. The spring 620 abuts against the sidewall of the dynamic ring 420 facing away from the static ring 410, and the spring 620 always provides thrust to ensure that the dynamic ring 420 and the static ring 410 fit tightly together.

[0050] In some embodiments, the abutment assembly 600 further includes a first sealing ring 640 and a second sealing ring 650 . The first sealing ring 640 is disposed between the dynamic ring seat 610 and the rotating shaft 300 , and the second sealing ring 650 is disposed between the dynamic ring seat 610 and the dynamic ring 420 .

[0051] See Figure 3 Preferably, a first sealing ring 640 is provided between the dynamic ring seat 610 and the rotating shaft 300 to improve the sealing between the dynamic ring seat 610 and the rotating shaft 300, thereby preventing the liquid in the housing cavity 110 from leaking through the gap between the rotating shaft 300 and the dynamic ring seat 610. A second sealing ring 650 is provided between the dynamic ring seat 610 and the dynamic ring 420 to improve the sealing between the dynamic ring seat 610 and the dynamic ring 420, thereby preventing the liquid in the housing cavity 110 from leaking through the gap between the dynamic ring seat 610 and the dynamic ring 420.

[0052] For further information, see Figure 3The stationary ring seat 200 includes a first stationary ring seat assembly 220 and a second stationary ring seat assembly 230, wherein the first stationary ring seat assembly 220 is connected to the housing 100 by screws, and the second stationary ring seat assembly 230 is connected to the first stationary ring seat assembly 220 by screws, and the stationary ring 410 is arranged at the connection between the first stationary ring seat assembly 220 and the second stationary ring seat assembly 230. Preferably, a third sealing ring 430 is provided between the stationary ring 410 and the first stationary ring seat assembly 220, and between the stationary ring 410 and the second stationary ring seat assembly 230, so as to improve the sealing between the stationary ring 410 and the stationary ring seat 200, and prevent the liquid inlet hole 210 from being connected to the shell cavity 110 through the gap between the stationary ring 410 and the stationary ring seat 200, resulting in a reduction in the amount of liquid flowing through the sealing end face. Similarly, it prevents the liquid in the liquid inlet hole 210 or the shell cavity 110 from entering the gap between the stationary ring 410 and the stationary ring seat 200, and leaking through the gap between the first stationary ring seat assembly 220 and the second stationary ring seat assembly 230.

[0053] In some embodiments, the liquid supply assembly 500 includes a water storage chamber 510, an acid liquid chamber 520, an alkaline liquid chamber 530, a first valve 540, a second valve 550 and a third valve 560. The water storage chamber 510, the first valve 540 and the liquid inlet 210 are connected in sequence, and the first valve 540 is used to control the water storage chamber 510 to supply liquid to the liquid inlet 210; the acid liquid chamber 520, the second valve 550 and the liquid inlet 210 are connected in sequence, and the second valve 550 is used to control the acid liquid chamber 520 to supply liquid to the liquid inlet 210; the alkaline liquid chamber 530, the third valve 560 and the liquid inlet 210 are connected in sequence, and the third valve 560 is used to control the alkaline liquid chamber 530 to supply liquid to the liquid inlet 210.

[0054] See Figure 1 Preferably, the water storage chamber 510, the first valve 540 and the liquid inlet 210 are connected in sequence through a pipe to form a water supply passage; the acid liquid chamber 520, the second valve 550 and the liquid inlet 210 are connected in sequence through a pipe to form an acid liquid supply passage; the alkali liquid chamber 530, the third valve 560 and the liquid inlet 210 are connected in sequence through a pipe to form an alkali liquid supply passage, and the above three pipelines are finally merged into the main pipeline, which is passed into the liquid inlet 210 through the main pipeline. Through the above arrangement, the first valve 540 can be controlled according to the value of the temperature sensor to provide a corresponding amount of cooling water to cool the sealing end face. The first valve 540 and the second valve 550 or the third valve 560 are controlled according to the value of the pH sensor to mix an appropriate amount of acid or alkali into the cooling water to adjust the pH of the cooling water, thereby achieving the purpose of descaling and neutralizing the solution.

[0055] In some embodiments, the liquid supply assembly 500 further includes a pressure regulating valve 570 , and the first valve 540 , the second valve 550 , and the third valve 560 are all in communication with the pressure regulating valve 570 .

[0056] See Figure 1 Preferably, the pressure regulating valve 570 is provided on the main pipe, that is, the liquid flowing through the first valve 540, the second valve 550 and the third valve 560 all need to pass through the pressure regulating valve 570 for pressure regulation. The pressure regulating valve 570 makes the pressure of the pressurized liquid slightly greater than the pressure of the liquid in the shell cavity 110, so that there is a pressure difference between the liquid inside and outside the shell cavity 110, ensuring that the liquid outside the shell cavity 110 can smoothly enter the shell cavity 110 through the liquid inlet hole 210 and the drainage hole 411. In a preferred embodiment, the pressure of the liquid after being processed by the pressure regulating valve 570 is 0.15 MPa higher than the pressure of the liquid in the shell cavity 110. The above arrangement can ensure that the liquid outside the shell cavity 110 can smoothly enter the shell cavity 110, while preventing the pressure of the liquid entering the shell cavity 110 from being too high, which in turn causes the pressure inside the shell cavity 110 to be too high and affect the normal operation of the rotating shaft 300 and other structures.

[0057] In some embodiments, the liquid supply assembly 500 further includes a pressure transmitter 580 , which is in communication with the pressure regulating valve 570 and is used to detect the pressure of the liquid processed by the pressure regulating valve 570 .

[0058] Preferably, the first valve 540, the second valve 550 and the third valve 560 are all connected to the pressure transmitter 580, and the pressure transmitter 580 is arranged on the main line. The liquid flowing through the first valve 540, the second valve 550 and the third valve 560 needs to flow into the liquid inlet 210 through the pressure transmitter 580. The pressure transmitter 580 is used to convert the pressure signal of the liquid flowing through into an electrical signal for detection, and can obtain the pressure of the liquid entering the shell cavity 110. It can be judged whether the current liquid pressure meets the preset pressure standard based on the liquid pressure parameter detected by the pressure transmitter 580. If the liquid pressure does not meet the preset standard, the pressure of the liquid flowing through the pressure regulating valve 570 is adjusted in real time by the pressure regulating valve 570 so that the pressure of the liquid entering the liquid inlet 210 meets the preset standard.

[0059] In some embodiments, the liquid supply assembly 500 further includes a one-way valve 590 , and the first valve 540 , the second valve 550 , and the third valve 560 are all connected to the one-way valve 590 .

[0060] Preferably, a one-way valve 590 is provided on the main line, and the liquid flowing through the first valve 540, the second valve 550 and the third valve 560 needs to flow into the liquid inlet 210 through the one-way valve 590. By providing the one-way valve 590, the liquid can only flow from the water storage chamber 510, the acid liquid chamber 520 and the alkali liquid chamber 530 to the liquid inlet 210, and cannot flow back from the liquid inlet 210 to the water storage chamber 510, the acid liquid chamber 520 and the alkali liquid chamber 530. Through the above-mentioned arrangement, the liquid in the shell cavity 110 can be prevented from flowing back into the water storage chamber 510, the acid liquid chamber 520 and the alkali liquid chamber 530.

[0061] A control method for the mechanical seal cooling system as described above comprises the following steps:

[0062] Step S1: After the first time period, the liquid supply assembly 500 is controlled to supply liquid to the liquid inlet 210 at an initial liquid supply volume, and each liquid supply process lasts for a second time period;

[0063] Step S2: obtaining a detected temperature value through a temperature sensor, and updating at least one of the first time period and the second time period according to the detected temperature value; if the detected temperature value is greater than or equal to a preset temperature standard value, then reducing the ratio of the first time period to the second time period; if the detected temperature value is less than the preset temperature standard value, then increasing the ratio of the first time period to the second time period;

[0064] Step S3: Return to execute step S1.

[0065] The first time period, the second time period, the initial value of the liquid supply volume, and the preset temperature standard value are all pre-set parameters. Preferably, the preset temperature standard value is a temperature that can ensure the normal operation of the dynamic ring 420 and the static ring 410, that is, the static ring 410 can maintain good physical properties and is not easily damaged at this temperature. When the mechanical seal cooling system is in operation, the temperature at the static ring 410 is obtained by the temperature sensor, and the first time period and the second time period are adjusted according to the detected temperature value, so that the ratio of the first time period and the second time period changes, that is, the cooling water supply volume is adjusted in real time according to the temperature of the static ring 410.

[0066] In some embodiments, the preset temperature standard value is set to 50°C, the first time period is 30s, the second time period is 20s, and the initial value of the liquid supply volume is 1L / min. When the detected temperature value is 60°C, it indicates that the cooling effect is insufficient. After step S2, at least one of the first time period and the second time period is updated, for example, the first time period is adjusted to 20s and the second time period is adjusted to 30s, then the ratio of the first time period to the second time period changes from 3 / 2 to 2 / 3, that is, the ratio of the first time period to the second time period is reduced, thereby increasing the total liquid supply in a single liquid supply process of 50s, improving the cooling effect, and further reducing the temperature of the static ring 410 in the next liquid supply process. If the detected temperature value after the next liquid supply process is still higher than the preset temperature standard value, the ratio of the first time period to the second time period is further reduced to improve the cooling effect. By continuously adjusting the ratio of the first time period to the second time period, the static ring 410 can be maintained at a suitable temperature.

[0067] In other embodiments, the preset parameters are the same as those in the above embodiments. For example, when the detected temperature value is 40°C, it indicates that the liquid supply is too high. The first time period is adjusted to 45s, and the second time period is adjusted to 15s, so that the ratio of the first time period to the second time period changes from 3 / 2 to 3 / 1, that is, the ratio of the first time period to the second time period increases, and the cooling effect decreases, so that the temperature at the static ring 410 rises to approach the preset temperature standard value, which can ensure that the temperature of the static ring 410 is within a reasonable range while reducing the liquid supply and achieving the purpose of saving water.

[0068] Through the above method, according to the detected temperature at the static ring 410, the ratio of the first time period to the second time period is adjusted to change the liquid supply and the cooling effect. Through multiple adjustments, the liquid supply can be reduced while ensuring that the static ring 410 is at a normal operating temperature, thereby achieving the purpose of saving water.

[0069] Furthermore, step S2 includes: obtaining a detected temperature value through a temperature sensor, comparing the detected temperature value with a preset temperature standard value, and if the detected temperature value is greater than or equal to the preset temperature standard value, shortening the first time period by a predetermined time difference and / or extending the second time period by a predetermined time difference; if the detected temperature value is less than the preset temperature standard value, extending the first time period by a predetermined time difference and / or shortening the second time period by a predetermined time difference.

[0070] It should be noted here that the above-mentioned predetermined time difference is a pre-set parameter. Preferably, the preset temperature standard value, the initial value of the liquid supply volume, the first time period, the second time period and the predetermined time difference are set according to the actual usage. For example, the preset temperature standard value is 50°C, the initial value of the liquid supply volume is 5ml / s, the first time period is 1min, the second time period is 30s, and the predetermined time difference is 3s. When the present mechanical seal cooling system is in use, after 1 minute, the liquid supply component 500 supplies liquid to the liquid inlet 210 at a liquid supply rate of 5ml / s, and the liquid supply continues for 30s. The temperature sensor continuously detects the temperature at the static ring 410 to obtain the detected temperature value in real time. If the detected temperature is greater than 50°C, it means that too little cooling water is provided and the cooling effect is poor. At this time, the first time period is shortened by 3s, and the new first time period is 57s, or the second time period is extended by 3s, and the new second time period is 33s, so that the ratio of the first time period to the second time period is reduced. After updating the first time period in the above manner, after 57 seconds (i.e., the updated first time period), the liquid supply component 500 supplies liquid to the liquid inlet 210 at a flow rate of 5 ml / s, and then adjusts the first time period or the second time period according to the detected temperature value. If the detected temperature is still higher than the preset temperature standard value, the liquid supply component 500 supplies liquid to the liquid inlet 210 at a flow rate of 5 ml / s after 54 seconds. The above method can increase the injection amount of cooling water by continuously shortening the liquid supply interval or continuously extending the time of the liquid supply process, thereby improving the cooling effect, until the cooling water supply amount can control the temperature of the static ring 410 below the preset temperature standard value.

[0071] On the contrary, if the detected temperature value is lower than the preset temperature standard value, too much cooling water is provided, resulting in a waste of cooling water. By continuously extending the first time period or shortening the second time period, the amount of cooling water injected each time is reduced, thereby saving cooling water while ensuring that the temperature at the static ring 410 remains below the preset temperature standard value.

[0072] Through the above method, multiple adjustments are made to make the injection volume of each water injection process close to the required injection volume. The above required injection volume is the minimum injection volume to ensure that the temperature of the static ring 410 is at the normal operating temperature, so as to avoid the injection volume deviating from the required injection volume due to excessive single adjustment amplitude in the first time period and / or the second time period.

[0073] Furthermore, when the first time period is continuously shortened or the second time period is extended, the detected temperature value will continue to decrease. If the detected temperature value continues to decrease until the detected temperature value is first detected to be lower than the preset temperature standard value, it can be confirmed that the amount of liquid supplied during each injection process at this time can ensure that the temperature of the static ring 410 remains within a reasonable range of the minimum liquid supply (i.e., the required liquid supply). Similarly, when the first time period is continuously extended or the second time period is shortened, the detected temperature value will continue to rise. If the detected temperature value continues to rise until it first exceeds the preset temperature standard value, it can be confirmed that the amount of liquid supplied during each injection process before this adjustment is the minimum liquid supply (i.e., the required liquid supply) that can ensure that the temperature of the static ring 410 remains within a reasonable range. After confirming the minimum liquid supply in the above manner, the first and second time periods can be fixed, and liquid supply can be performed at a fixed frequency to keep the temperature at the static ring 410 below the preset temperature standard value, while also saving cooling water consumption. Determining the required liquid supply volume in this way requires that the amplitude of each adjustment of the first time period and / or the second time period be small, that is, the value of the predetermined time difference be small, so as to avoid a large difference between the actual liquid supply volume and the required liquid supply volume due to excessive adjustment amplitude, resulting in water waste.

[0074] It should be noted that in the above control method, the values ​​of the first time period, the second time period and the predetermined time difference are all greater than 0. The initial value of the liquid supply volume can be determined by the following formula:

[0075] Q=3.7 10 -8 ;

[0076] Among them, the initial value of the liquid supply is: Q ------ L / min;

[0077] Spring specific pressure: PS --------- MPa;

[0078] Actual liquid pressure (liquid pressure after being processed by pressure regulating valve 570): P2 ------ MPa;

[0079] Outer diameter of dynamic ring 420: D2 ---------------- mm;

[0080] Inner diameter of dynamic ring 420: D1 ---------------- mm;

[0081] Mechanical seal balance diameter (diameter of the dynamic ring 420 where the abutment assembly 600 is mounted on the dynamic ring 420): D0---------------- mm;

[0082] Liquid back pressure coefficient: λ ---------- dimensionless (the medium is clean water and the value is 0.5);

[0083] Actual speed of dynamic ring 420: n --------------- r / min.

[0084] It should be noted that the parameters in the above formula are fixed parameters during the operation of the mechanical seal cooling system. Specifically, these parameters are determined while the mechanical seal cooling system is operating, thereby calculating the initial value of the liquid supply volume. These parameters reflect the operating intensity of the mechanical seal cooling system and, therefore, the heat generation at the seal end face, providing a reference value for cooling water usage, thereby more appropriately setting the liquid supply volume of the liquid supply assembly 500.

[0085] In some embodiments, the control method further includes the following steps:

[0086] The pH sensor detects the pH of the liquid in the housing 110, determines the relationship between the pH of the liquid and a preset pH standard value, and performs one of the following steps:

[0087] When the pH value of the liquid is greater than the preset pH value, the liquid supply component 500 is controlled to provide acidic liquid;

[0088] When the pH value of the liquid is lower than the preset pH value, the liquid supply component 500 is controlled to provide alkaline liquid;

[0089] When the pH value of the liquid is equal to the preset pH value, the liquid supply assembly 500 is controlled to provide neutral liquid.

[0090] Preferably, the preset pH standard value is usually 7, that is, neutral. When the pH of the liquid is greater than the preset pH standard value, it means that alkaline substances such as scale or crystals exist on the sealing end face or the liquid inlet water channel. At this time, the liquid supply component provides acidic liquid to remove scale and crystals to prevent scale or crystals from affecting the device. When the pH of the liquid is less than the preset pH standard value, it means that there is too much acid in the liquid medium. The liquid supply component 500 provides alkaline liquid to neutralize the acid to prevent the acid from corroding metal structures such as the shell 100 or the rotating shaft 300. When the pH of the liquid is equal to the standard pH, it means that there are no impurities such as scale or crystals, and neutral cooling water can be passed in.

[0091] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0092] The above-described embodiments merely represent several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that a person of ordinary skill in the art may make various modifications and improvements without departing from the spirit of the present application, and these modifications and improvements fall within the scope of protection of the present application. Therefore, the scope of protection of the present patent application shall be determined by the appended claims.

Claims

1. A mechanical seal cooling system, characterized in that: include: A shell body, with a shell cavity inside; A stationary ring seat is connected to the housing and is provided with a liquid inlet hole; A rotating shaft is provided in the shell cavity and is rotatably connected to the stationary ring seat; A sealing friction pair includes a stationary ring and a dynamic ring, wherein the stationary ring is fixedly connected to the stationary ring seat, the stationary ring has a first annular surface and a second annular surface opposite to each other, the stationary ring is provided with a drainage hole penetrating the first annular surface and the second annular surface, and the liquid inlet is connected to the shell cavity through the drainage hole; the dynamic ring is sealingly abutted against the first annular surface of the stationary ring, the dynamic ring is arranged around the outer periphery of the rotating shaft and moves relative to the stationary ring with the rotating shaft, and the liquid output from the drainage hole can flush the dynamic ring; a temperature sensor, in contact with the static ring and used to obtain the temperature of the static ring; A pH sensor is disposed in the shell cavity and is used to detect the pH of the liquid in the shell cavity; a liquid supply assembly connected to the liquid inlet, the liquid supply assembly being used to supply liquid to the shell cavity through the liquid inlet and the drainage hole; The liquid supply component is configured to adjust the liquid supply flow rate according to the temperature obtained by the temperature sensor, and to adjust the pH of the liquid supplied to the shell cavity according to the pH of the liquid obtained by the pH sensor.

2. The mechanical seal cooling system according to claim 1, characterized in that: The minimum aperture of the liquid inlet hole is larger than the minimum aperture of the drainage hole.

3. The mechanical seal cooling system according to claim 1, characterized in that: A guide groove is provided on the side wall where the static ring and the dynamic ring abut against each other, and the drainage hole is provided on the bottom wall of the guide groove.

4. The mechanical seal cooling system according to claim 1, characterized in that: It also includes an abutment component, which is sleeved on the outer circumference of the rotating shaft and the movable ring, and abuts against the side wall of the movable ring facing away from the static ring.

5. The mechanical seal cooling system according to claim 4, characterized in that: The abutment assembly includes a dynamic ring seat, a set screw and a spring. The dynamic ring seat is sleeved on the outer circumference of the rotating shaft and the dynamic ring, and a threaded hole is opened on the surface. The set screw is threadedly connected to the threaded hole and inserted into the rotating shaft; one end of the spring is connected to the dynamic ring seat, and the other end of the spring abuts against the dynamic ring.

6. The mechanical seal cooling system according to claim 5, characterized in that: The abutment assembly further includes a first sealing ring and a second sealing ring. The first sealing ring is arranged between the dynamic ring seat and the rotating shaft, and the second sealing ring is arranged between the dynamic ring seat and the dynamic ring.

7. The mechanical seal cooling system according to claim 1, characterized in that: The liquid supply component includes a water storage chamber, an acid liquid chamber, an alkali liquid chamber, a first valve, a second valve and a third valve. The water storage chamber, the first valve and the liquid inlet are connected in sequence, and the first valve is used to control the water storage chamber to supply liquid to the liquid inlet; the acid liquid chamber, the second valve and the liquid inlet are connected in sequence, and the second valve is used to control the acid liquid chamber to supply liquid to the liquid inlet; the alkali liquid chamber, the third valve and the liquid inlet are connected in sequence, and the third valve is used to control the alkali liquid chamber to supply liquid to the liquid inlet.

8. The mechanical seal cooling system according to claim 7, characterized in that: The liquid supply assembly further includes a pressure regulating valve, and the first valve, the second valve, and the third valve are all connected to the pressure regulating valve.

9. The mechanical seal cooling system according to claim 8, characterized in that: The liquid supply assembly further includes a pressure transmitter, which is communicated with the pressure regulating valve and is used to detect the pressure of the liquid processed by the pressure regulating valve.

10. The mechanical seal cooling system according to claim 7, characterized in that: The liquid supply assembly further includes a one-way valve, and the first valve, the second valve, and the third valve are all connected to the one-way valve.

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