Feed water control method of mechanical seal cooling system

Abstract

The invention relates to a water supply control method of a mechanical seal cooling system, a liquid inlet hole is formed in the side wall of a shell in the mechanical seal cooling system, a sealing friction pair is arranged in the shell, a liquid supply assembly is communicated with the liquid inlet hole, and the liquid inlet hole and the sealing friction pair are correspondingly arranged, so that liquid passing through the liquid inlet hole can be in contact with the sealing friction pair; and the temperature sensor is contacted with the sealing friction pair. The water supply control method comprises the steps that S1, after a first time period, a liquid supply assembly is controlled to carry out liquid supply operation on a liquid inlet hole according to a liquid supply flow initial value, and after a second time period, the liquid supply operation is stopped; s2, acquiring a detection temperature value through a temperature sensor, and updating at least one of the first time period and the second time period according to the detection temperature value; and S3, returning to execute the step S1. The total water injection amount of the next time can be adjusted according to the temperature detected in real time, so that the water consumption is reduced while the cooling effect is ensured, 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 water supply control method for a mechanical seal cooling system with good water-saving effect. 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, a large amount of water is injected into the location of the mechanical seal structure where heat is greater (i.e., the sealing end face) to cool the mechanical seal structure, ensuring that the temperature at the sealing end face is maintained at a low level, thereby avoiding damage to the mechanical seal structure due to overheating of part of the structure.

[0004] However, during operation, a mechanical seal structure only needs to maintain its temperature below a certain value to ensure normal operation. The aforementioned method of cooling the mechanical seal structure by injecting a large amount of water causes the temperature of the mechanical seal structure to be far below the value required for normal operation, resulting in high water consumption and a waste of water resources. Furthermore, the aforementioned method of injecting a large amount of water is difficult to implement in areas with relatively scarce water resources. Summary of the Invention

[0005] Based on this, it is necessary to provide a water supply control method for a mechanical seal cooling system with better water-saving effect to address the problem of high water consumption of the above-mentioned mechanical seal structure.

[0006] A water supply control method for a mechanical seal cooling system, wherein the mechanical seal cooling system includes a housing, a liquid supply assembly, a sealing friction pair, and a temperature sensor, wherein a liquid inlet hole is formed in a side wall of the housing, the sealing friction pair is disposed within the housing, the liquid supply assembly is in communication with the liquid inlet hole, the liquid inlet hole and the sealing friction pair are disposed correspondingly so that liquid passing through the liquid inlet hole can contact the sealing friction pair, and the temperature sensor is in contact with the sealing friction pair;

[0007] The water supply control method comprises:

[0008] Step S1: After a first time period, control the liquid supply component to supply liquid to the liquid inlet at an initial liquid supply flow rate, and after a second time period, stop the liquid supply operation;

[0009] Step S2: obtaining a detected temperature value through the temperature sensor; if the detected temperature value is greater than or equal to a preset temperature standard value, updating at least one of the first time period and the second time period so that the ratio of the first time period to the second time period is reduced; if the detected temperature value is less than the preset temperature standard value, updating at least one of the first time period and the second time period so that the ratio of the first time period to the second time period is increased;

[0010] Step S3: Return to execute step S1.

[0011] In some embodiments, the step of updating at least one of the first time period and the second time period to reduce the ratio of the first time period to the second time period includes: shortening the first time period by a predetermined time difference and / or lengthening the second time period by the predetermined time difference;

[0012] The step of updating at least one of the first time period and the second time period to increase the ratio of the first time period to the second time period includes: extending the first time period by the predetermined time difference and / or shortening the second time period by the predetermined time difference.

[0013] In some embodiments, the step of shortening the first time period by a predetermined time difference and / or extending the second time period by the predetermined time difference further comprises: comparing the first time period with a time period threshold, and if the first time period is less than or equal to the time period threshold, extending the first time period by the predetermined time difference and extending the second time period by the predetermined time difference;

[0014] The step of extending the first time period by the predetermined time difference and / or shortening the second time period by the predetermined time difference further includes: comparing the second time period with the time period threshold; if the second time period is less than or equal to the time period threshold, extending the second time period by the predetermined time difference and extending the first time period by the predetermined time difference.

[0015] In some embodiments, the mechanical seal cooling system also includes a spring, the sealing friction pair includes a dynamic ring and a static ring, the static ring is fixedly connected to the inner wall of the shell, the dynamic ring abuts against one side of the static ring, and the spring abuts against the side of the dynamic ring facing away from the static ring; the initial value of the liquid supply flow rate is determined according to the spring specific pressure of the spring, the liquid pressure entering the liquid inlet hole, the inner diameter of the dynamic ring, the outer diameter of the dynamic ring and the relative rotational speed of the dynamic ring and the static ring.

[0016] In some embodiments, the mechanical seal cooling system further includes a pressure pump, and the liquid supply assembly, the pressure pump, and the liquid inlet hole are sequentially connected;

[0017] The liquid supply operation includes: the liquid provided by the liquid supply component flows through the pressure pump, the pressure pump is controlled to adjust the pressure of the flowing liquid, and the liquid processed by the pressure pump flows into the liquid inlet hole.

[0018] In some embodiments, the mechanical seal cooling system further includes a pressure transmitter and a pressure sensor, the pressure pump, the pressure transmitter, and the liquid inlet are sequentially connected, the pressure sensor is disposed in the housing, and the pressure sensor is in contact with the liquid passing through the liquid inlet;

[0019] Before the step of allowing the liquid processed by the pressure pump to flow into the liquid inlet hole, the method further includes: causing the liquid processed by the pressure pump to flow through the pressure transmitter, obtaining a pressure value of the liquid flowing through the pressure transmitter and recording it as a first pressure value; obtaining a pressure value of the liquid in the housing through the pressure sensor and recording it as a second pressure value;

[0020] The step of controlling the booster pump to adjust the pressure of the liquid flowing through it includes: recording the sum of the second pressure value and the preset pressure difference as a third pressure value, comparing the first pressure value with the third pressure value, and controlling the booster pump to adjust the pressure of the liquid flowing through the booster pump to the third pressure value.

[0021] In some embodiments, the mechanical seal cooling system further includes a pH sensor, which is disposed inside the housing and contacts the liquid passing through the liquid inlet. The liquid supply operation includes:

[0022] The pH sensor detects the pH of the liquid in the shell cavity. When the pH of the liquid is greater than the preset pH standard value, the liquid supply component is controlled to provide acidic liquid; when the pH of the liquid is less than the preset pH standard value, the liquid supply component is controlled to provide alkaline liquid; when the pH of the liquid is equal to the preset pH standard value, the liquid supply component is controlled to provide neutral liquid.

[0023] In some embodiments, the liquid supply assembly includes a water storage chamber, an acid liquid chamber, an alkaline liquid chamber, a first valve, a second valve, and a third valve, wherein the water storage chamber, the first valve, and the liquid inlet are sequentially connected; the acid liquid chamber, the second valve, and the liquid inlet are sequentially connected; and the alkaline liquid chamber, the third valve, and the liquid inlet are sequentially connected;

[0024] The step of controlling the liquid supply component to provide acidic liquid includes: controlling the second valve to open so that the liquid in the acid liquid chamber flows into the liquid inlet hole; the step of controlling the liquid supply component to provide alkaline liquid includes: controlling the third valve to open so that the liquid in the alkaline liquid chamber flows into the liquid inlet hole; the step of controlling the liquid supply component to provide neutral liquid includes: controlling the first valve to open so that the liquid in the water storage chamber flows into the liquid inlet hole.

[0025] In some embodiments, the step of controlling the liquid supply assembly to provide the acidic liquid further comprises: controlling the first valve to open so that the liquid in the water storage chamber and the liquid in the acid liquid chamber enter the liquid inlet hole;

[0026] The step of controlling the liquid supply component to provide alkaline liquid further includes: controlling the first valve to open so that the liquid in the water storage chamber and the liquid in the alkaline liquid chamber enter the liquid inlet hole.

[0027] In some embodiments, the control method further includes: when the mechanical seal cooling system is started, controlling the liquid supply component to provide acidic liquid to the liquid inlet hole at an initial value of the liquid supply flow rate, and after a third time period, controlling the liquid supply component to provide acidic liquid; and executing the step of controlling the liquid supply component to supply liquid to the liquid inlet hole at the initial value of the liquid supply flow rate after the first time period.

[0028] The above-mentioned water supply control method for a mechanical seal cooling system comprises a housing, a liquid supply assembly, a sealing friction pair, and a temperature sensor. The liquid supply assembly is connected to a liquid inlet on the surface of the housing, and the sealing friction pair is disposed inside the housing. The liquid supply assembly supplies liquid to the liquid inlet, which flows through the sealing friction pair through the liquid inlet and ultimately into the housing. The temperature sensor is used to detect the temperature at the sealing friction pair. After the liquid supply assembly supplies water, after a first time period, the liquid supply assembly injects water into the housing at a fixed flow rate equal to the initial liquid supply flow rate. The injection lasts for a second time period. After the injection is completed, the temperature of the static ring is detected. The length of the first or second time period is adjusted based on the temperature value detected by the temperature sensor, thereby changing the interval or injection duration of the next water injection, thereby adjusting the cooling effect of each water injection in real time. The sealing friction pair is cooled by injecting water in batches, and the temperature of the sealing friction pair is monitored in real time by the temperature sensor. The total amount of water injected each time is adjusted based on the real-time monitored temperature to ensure that each water injection cooling achieves the desired cooling effect, i.e., the temperature of the sealing end face does not exceed the maximum temperature acceptable for normal operation. The beneficial effect of the present application is that the total amount of water injected next time can be adjusted according to the real-time detected temperature, so as to ensure that the cooling effect is maintained while reducing water consumption, thereby achieving the purpose of water saving. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 This is a schematic diagram of the overall structure of an embodiment of a mechanical seal cooling system of the present application.

[0030] 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.

[0031] Figure 3 for Figure 2 Enlarged view of point A in the middle.

[0032] In the figure, 100, housing; 110, liquid inlet; 200, liquid supply assembly; 210, water storage chamber; 220, acid chamber; 230, alkali chamber; 240, first valve; 250, second valve; 260, third valve; 300, sealing friction pair; 310, dynamic ring; 320, static ring; 330, spring; 400, pressure pump; 500, pressure transmitter. DETAILED DESCRIPTION

[0033] 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.

[0034] 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.

[0035] 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.

[0036] 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.

[0037] 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.

[0038] See Figure 1 , 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. It should be noted that: Figure 1 The figure only shows the connection method and sequence between the liquid supply component 200 and other structures in the mechanical seal cooling system, and does not represent its specific structure. One embodiment of the present application provides a water supply control method for a mechanical seal cooling system, wherein the mechanical seal cooling system includes a housing 100, a liquid supply component 200, a sealing friction pair 300 and a temperature sensor (not shown in the figure), a liquid inlet hole 110 is opened on the side wall of the housing 100, the sealing friction pair 300 is arranged inside the housing 100, the liquid supply component 200 is connected to the liquid inlet hole 110, and the liquid inlet hole 110 and the sealing friction pair 300 are correspondingly arranged so that the liquid passing through the liquid inlet hole 110 can contact the sealing friction pair 300, and the temperature sensor is in contact with the sealing friction pair 300;

[0039] Water supply control methods include:

[0040] Step S1: After a first time period, control the liquid supply assembly 200 to supply liquid to the liquid inlet 110 at an initial liquid supply flow rate, and stop the liquid supply operation after a second time period;

[0041] Step S2: obtaining a detected temperature value through a temperature sensor; if the detected temperature value is greater than or equal to a preset temperature standard value, updating at least one of the first time period and the second time period so that the ratio of the first time period to the second time period is reduced; if the detected temperature value is less than the preset temperature standard value, updating at least one of the first time period and the second time period so that the ratio of the first time period to the second time period is increased;

[0042] Step S3: Return to execute step S1.

[0043] like Figure 1 、 Figure 2 and Figure 3 As shown, in a preferred mechanical seal cooling system, a liquid inlet hole 110 is formed on the surface of the housing 100, and a liquid supply assembly 200 is disposed on the exterior of the housing 100. The liquid supply assembly 200 can supply liquid to the interior of the housing 100 through the liquid inlet hole 110. The liquid entering the interior of the housing 100 through the liquid inlet hole 110 contacts the sealing friction pair 300 to cool the sealing friction pair 300. After contacting the sealing friction pair 300, the liquid continues to flow and remains inside the housing 100. A temperature sensor is in contact with the sealing friction pair 300 to detect the temperature of the sealing friction pair 300, thereby obtaining the real-time temperature of the sealing friction pair 300. The water supply control method based on the above structure is: controlling the liquid supply component 200 to supply water to the liquid inlet 110 at a flow rate of the initial value of the liquid supply flow rate at intervals of the first time period each time, the duration of each liquid supply being the second time period, and after each water supply is completed, detecting the temperature of the sealing friction pair 300 by a temperature sensor to determine whether the current liquid supply amount can make the temperature of the sealing friction pair 300 lower than the temperature allowed for normal operation, thereby adjusting the interval time of the next water supply (i.e., the first time period) and the liquid supply duration (i.e., the second time period) to adjust the amount of water used for cooling in real time.

[0044] It should be noted that the preset temperature standard value is generally set to the maximum temperature allowed for normal operation of the sealing friction pair 300. For example, if the sealing friction pair 300 operates at a temperature exceeding 60°C for a long time, the service life of the sealing friction pair 300 will be reduced. Therefore, the preset temperature standard value is set to 60°C. The liquid provided by the liquid supply assembly 200 for cooling is generally cooling water.

[0045] Specifically, the following is an embodiment of the water supply control method. For example, the first time period is 30s, the second time period is 60s, the initial value of the liquid supply flow rate is 1L / min, and when enabled, after 30s, the liquid supply component 200 supplies liquid to the liquid inlet 110 at a flow rate of 1L / min, and the liquid supply time is 60s. It can be seen that the liquid supply process is 90s in total, the total liquid supply is 1L, and the liquid supply volume per unit time (per second) during the liquid supply process is 11.1ml. The preset temperature standard value is set to 60°C. The temperature of the sealing friction pair 300 is detected by a temperature sensor. If the detected temperature value is 70°C, it indicates that the cooling effect is insufficient and the water supply is too little. The first time period is adjusted to 20s, and the second time period is adjusted to 70s. The ratio of the first time period to the second time period is adjusted from 1 / 2 to 2 / 7. The reduction of the ratio of the first time period to the second time period makes it easier to know that the liquid supply per unit time can be increased, thereby improving the cooling effect and reducing the temperature of the sealing friction pair 300 to below the preset temperature standard value, ensuring the normal operation of the sealing friction pair 300 and prolonging the service life. If the detected temperature is 50°C, it indicates that the water supply is excessive, resulting in water waste. The first time period is adjusted to 40s, and the second time period is adjusted to 40s. The ratio of the first time period to the second time period is adjusted from 1 / 2 to 1 / 1. The increase of the ratio reduces the total amount of liquid supply per unit time, reduces the cooling effect, and makes the temperature of the sealing friction pair 300 tend to the preset temperature standard value. Under the premise of ensuring the normal operation of the sealing friction pair 300, water consumption is reduced to achieve the purpose of water saving.

[0046] The above-mentioned water supply control method adjusts the total amount of liquid supplied by the liquid supply component 200 per unit time according to the temperature of the sealing friction pair 300, so that the temperature of the sealing friction pair 300 is lower than the preset temperature standard value, so as to ensure the normal operation of the sealing friction pair 300, increase the service life of the sealing friction pair 300, and reduce the liquid supply while achieving the purpose of saving water.

[0047] Furthermore, the value of the first time period can be set to a smaller value, such as 1s or 0.5s, that is, the interval time of each liquid supply is shortened to avoid the temperature of the sealing friction pair 300 continuing to rise to a high level due to too long a liquid supply interval, thereby effectively improving the service life of the sealing friction pair 300.

[0048] In some embodiments, updating at least one of the first time period and the second time period so that the ratio of the first time period to the second time period decreases includes: shortening the first time period by a predetermined time difference and / or lengthening the second time period by a predetermined time difference;

[0049] The step of updating at least one of the first time period and the second time period to increase the ratio of the first time period to the second time period includes: extending the first time period by a predetermined time difference and / or shortening the second time period by a predetermined time difference.

[0050] The above-mentioned predetermined time difference is a preset parameter. The fixed value (i.e., the predetermined time difference) is adjusted each time the first or second time period is adjusted. The fixed values ​​of the first and second time periods can also be adjusted simultaneously to obtain a new first and second time period. Specifically, for example, the preset temperature standard value is 60°C, the initial liquid supply value is 5ml / s, the first time period is 1 minute, the second time period is 30 seconds, and the predetermined time difference is 3 seconds. When this mechanical seal cooling system is in use, after 1 minute, the liquid supply component 200 supplies liquid to the liquid inlet 110 at a supply rate of 5ml / s for 30 seconds. The temperature sensor continuously detects the temperature of the sealing friction pair 300 to obtain the detected temperature value in real time. If the detected temperature value is 70°C, it means that the cooling water provided is too insufficient and the cooling effect is poor. In this case, the first time period is shortened by 3 seconds, and the new first time period is 57 seconds. After 57 seconds, the liquid supply assembly 200 supplies liquid to the liquid inlet 110 at a flow rate of 5 ml / s. At this point, the cooling effect is slightly improved compared to the first time period of 60 seconds. If the detected temperature is still higher than the preset temperature standard value, such as 58°C, the first time period is adjusted based on the detected temperature value. After 54 seconds, the liquid supply assembly 200 supplies liquid to the liquid inlet 110 at a flow rate of 5 ml / s. This method can continuously shorten the interval between liquid supply to increase the amount of liquid supplied per unit time, thereby continuously improving the cooling effect and controlling the temperature of the sealing friction pair 300 below the preset temperature standard value. Similarly, the second time period can be extended by 3 seconds, or the first time period can be shortened by 3 seconds and the second time period can be extended by 3 seconds, which can also achieve the purpose of improving the cooling effect.

[0051] On the contrary, if the detected temperature value is lower than the preset temperature standard value, it means that too much cooling water is provided, resulting in a waste of water resources. By continuously extending the first time period or continuously shortening the second time period, the amount of liquid supplied per unit time is reduced, thereby saving cooling water while ensuring that the temperature at the static ring 320 remains below the preset temperature standard value.

[0052] Through the above method, by gradually adjusting the parameters of the first time period and the second time period, the change range of the liquid supply volume per unit time is small, so that the liquid supply volume per unit time slowly approaches the required liquid supply volume (that is, the liquid supply volume that makes the temperature of the sealing friction pair 300 slightly lower than the preset temperature standard value) can be avoided. The waste of water resources caused by the single adjustment range being too large, which causes the adjusted liquid supply volume to deviate from the required liquid supply volume.

[0053] In some embodiments, the step of shortening the first time period by a predetermined time difference and / or extending the second time period by a predetermined time difference further comprises: comparing the first time period with a time period threshold, and if the first time period is less than or equal to the time period threshold, extending the first time period by the predetermined time difference and extending the second time period by the predetermined time difference;

[0054] After the step of extending the first time period by a predetermined time difference and / or shortening the second time period by a predetermined time difference, the method further includes: comparing the second time period with a time period threshold; if the second time period is less than or equal to the time period threshold, extending the second time period by the predetermined time difference and extending the first time period by the predetermined time difference.

[0055] Preferably, the time period threshold is the minimum of the first and second time periods, typically set to 0. By setting the time period threshold for comparison with the first and second time periods, this prevents the first or second time period from falling below the minimum value after adjustment, thereby preventing the water supply control method from failing to execute. Specifically, for example, if the time period threshold is set to 0, and after the first and second time periods are adjusted through the aforementioned steps, the first time period is 3 seconds and the second time period is 2 seconds, with a predetermined time difference of 4 seconds. Based on a comparison between the detected temperature value and the preset temperature standard value, the first time period is shortened, resulting in an updated first time period of -1 second. In this case, if the first time period is less than the time period threshold, the first time period is restored to 3 seconds, and the second time period is adjusted to extend the second time period to achieve the same technical effect as shortening the first time period (i.e., improving the cooling effect). Similarly, based on a comparison between the detected temperature value and the temperature standard value, the second time period is shortened to -2 seconds after update. In this case, if the second time period is less than the time period threshold, the second time period is restored to 2 seconds, and extending the first time period achieves the same technical effect as shortening the second time period (i.e., reducing the cooling effect). This setting prevents the first and second time periods from failing to meet execution conditions, resulting in the water supply control method failing to execute normally.

[0056] In some embodiments, the mechanical seal cooling system also includes a spring 330, the sealing friction pair 300 includes a dynamic ring 310 and a static ring 320, the static ring 320 is fixedly connected to the inner wall of the housing 100, the dynamic ring 310 abuts against one side of the static ring 320, and the spring 330 abuts against the side of the dynamic ring 310 facing away from the static ring 320; the initial value of the liquid supply flow rate is determined according to the spring 330 specific pressure of the spring 330, the liquid pressure entering the liquid inlet hole 110, the inner diameter of the dynamic ring 310, the outer diameter of the dynamic ring 310 and the relative rotational speed of the dynamic ring 310 and the static ring 320.

[0057] like Figure 1 、 Figure 2 and Figure 3 As shown, preferably, the initial value of the liquid supply amount can be determined by the following formula:

[0058] Q=3.7 10 -8 ;

[0059] Among them, the initial value of the liquid supply flow rate is: Q ------ L / min;

[0060] Spring 330 specific pressure: PS --------- MPa;

[0061] Actual liquid pressure (liquid pressure through the liquid inlet hole 110): P2 ------ MPa;

[0062] Outer diameter of dynamic ring 310: D2 ---------------- mm;

[0063] Inner diameter of dynamic ring 310: D1 ---------------- mm;

[0064] Dynamic ring 310 seal balance diameter: D0 ---------------- mm;

[0065] Liquid back pressure coefficient: λ ---------- dimensionless (the medium is clean water and the value is 0.5);

[0066] Actual speed of dynamic ring 310: n --------------- r / min.

[0067] It should be noted that the parameters in the above formula are fixed parameters during the operation of the mechanical seal cooling system. That is, when the mechanical seal cooling system is in operation, these parameters are determined, thereby calculating the initial value of the liquid supply volume. These parameters can reflect the operating intensity of the mechanical seal cooling system and thus the heat generation at the seal end face, thereby providing a reference value for the cooling water usage, thereby more reasonably setting the liquid supply volume of the liquid supply assembly 200.

[0068] In some embodiments, the mechanical seal cooling system further includes a pressure pump 400 , and the liquid supply assembly 200 , the pressure pump 400 and the liquid inlet 110 are sequentially connected;

[0069] The liquid supply operation includes: the liquid provided by the liquid supply assembly 200 flows through the pressure pump 400 , the pressure pump 400 is controlled to adjust the pressure of the flowing liquid, and the liquid processed by the pressure pump 400 flows into the liquid inlet 110 .

[0070] Preferably, the liquid supply assembly 200, the pressure pump 400, and the liquid inlet 110 are sequentially connected via a pipeline. The liquid provided by the liquid supply assembly 200 flows through the pressure pump 400 and then flows to the liquid inlet 110. When the liquid supply assembly 200 is in liquid supply operation, the pressure of the liquid flowing through the pressure pump 400 is adjusted so that the pressure of the liquid entering the liquid inlet 110 is greater than the pressure of the liquid inside the housing 100, so that the liquid entering the liquid inlet 110 can more easily pass through the liquid inlet 110 into the interior of the housing 100.

[0071] In some embodiments, the mechanical seal cooling system further includes a pressure transmitter 500 and a pressure sensor (not shown in the figures). The pressure pump 400, the pressure transmitter 500, and the liquid inlet 110 are sequentially connected. The pressure sensor is disposed in the housing 100 and contacts the liquid passing through the liquid inlet 110.

[0072] Before the step of allowing the liquid processed by the pressure pump 400 to flow into the liquid inlet 110, the method further includes: allowing the liquid processed by the pressure pump 400 to flow through the pressure transmitter 500, obtaining a pressure value of the liquid flowing through the pressure transmitter 500 and recording it as a first pressure value; obtaining a pressure value of the liquid in the housing 100 through the pressure sensor and recording it as a second pressure value;

[0073] The steps of controlling the boosting pump 400 to adjust the pressure of the liquid flowing through include: the sum of the second pressure value and the preset pressure difference is recorded as the third pressure value, comparing the first pressure value with the third pressure value, and controlling the boosting pump 400 to adjust the pressure of the liquid flowing through the boosting pump 400 to the third pressure value.

[0074] The preset pressure difference is a pre-set parameter. Preferably, the liquid provided by the liquid supply component 200 is processed by the pressure pump 400 and flows into the pressure transmitter 500, so that the pressure of the liquid entering the liquid inlet hole 110 can be obtained through the pressure transmitter 500. It should be noted that if the first pressure value is less than the second pressure value, it will be difficult for the liquid to enter the interior of the housing 100 through the liquid inlet hole 110. If the first pressure value is much greater than the second pressure value, the pressure inside the housing 100 will be too high. Therefore, it is necessary to pre-set an appropriate preset pressure difference to ensure that the pressure of the liquid entering the liquid inlet hole 110 is slightly greater than the pressure of the liquid inside the housing 100. This ensures that the liquid provided by the liquid supply component 200 can easily enter the interior of the housing 100 while avoiding excessive pressure inside the housing 100. For example, the preset pressure difference is usually a small value, such as 0.15 MPa. Therefore, the third pressure value is determined based on the detected second pressure value and the preset pressure difference. The first pressure value and the third pressure value are compared to facilitate the pressure pump 400 to adjust the pressure of the liquid flowing through to ensure that the pressure of the liquid entering the liquid inlet hole 110 is the third pressure value, that is, the pressure value detected by the pressure transmitter 500 is equal to the third pressure value. This achieves the above-mentioned technical effect of ensuring that the liquid provided by the liquid supply assembly 200 can easily enter the interior of the housing 100 while avoiding excessive pressure inside the housing 100.

[0075] In some embodiments, the mechanical seal cooling system further includes a pH sensor (not shown in the figure). The pH sensor is disposed inside the housing 100 and contacts the liquid passing through the liquid inlet 110. The liquid supply operation includes:

[0076] The pH value of the liquid in the shell cavity is detected by the pH sensor. When the pH value of the liquid is greater than the preset pH value, the liquid supply component 200 is controlled to provide acidic liquid; when the pH value of the liquid is less than the preset pH value, the liquid supply component 200 is controlled to provide alkaline liquid; when the pH value of the liquid is equal to the preset pH value, the liquid supply component 200 is controlled to provide neutral liquid.

[0077] It should be noted that due to different regions, the cooling water available is usually not completely neutral. If the cooling water is alkaline, it is easy to form scale at the location where it flows through, affecting the normal operation of the mechanical device. If the cooling water is acidic, it is easy to corrode metal materials. Therefore, preferably, a pH sensor is set in the shell 100 to detect the pH of the cooling water entering the shell 100. The above method controls the liquid supply component 200 to provide liquid with corresponding pH according to the pH of the liquid in the shell 100. For example, the preset pH standard value is set to 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 in the cooling water. At this time, the liquid supply component 200 provides acidic liquid to remove scale and crystals to prevent scale or crystals from affecting the normal operation of the mechanical 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 200 provides alkaline liquid to neutralize the acid to prevent the acid from corroding the metal material. When the pH value of the liquid is equal to the preset pH value, it means that there is no impurities such as scale, crystallization, and acid, and neutral liquid can be passed in for cooling.

[0078] In some embodiments, the liquid supply assembly 200 includes a water storage chamber 210, an acid liquid chamber 220, an alkaline liquid chamber 230, a first valve 240, a second valve 250, and a third valve 260. The water storage chamber 210, the first valve 240, and the liquid inlet 110 are sequentially connected; the acid liquid chamber 220, the second valve 250, and the liquid inlet 110 are sequentially connected; and the alkaline liquid chamber 230, the third valve 260, and the liquid inlet 110 are sequentially connected.

[0079] The step of controlling the liquid supply assembly 200 to provide acidic liquid includes: controlling the second valve 250 to open so that the liquid in the acid liquid chamber 220 flows into the liquid inlet hole 110; the step of controlling the liquid supply assembly 200 to provide alkaline liquid includes: controlling the third valve 260 to open so that the liquid in the alkaline liquid chamber 230 flows into the liquid inlet hole 110; the step of controlling the liquid supply assembly 200 to provide neutral liquid includes: controlling the first valve 240 to open so that the liquid in the water storage chamber 210 flows into the liquid inlet hole 110.

[0080] like Figure 1 、 Figure 2 and Figure 3As shown, preferably, the liquid supply component 200 is provided with three cavities for storing different pH values, and the liquid supply is controlled by setting a valve. Through the above method, the pH value of the liquid supply can be adjusted by controlling the valve to achieve the corresponding neutralization effect, which can realize automatic control and simple adjustment.

[0081] In some embodiments, the step of controlling the liquid supply assembly 200 to provide the acidic liquid further includes: controlling the first valve 240 to open, so that the liquid in the water storage chamber 210 and the liquid in the acid liquid chamber 220 enter the liquid inlet hole 110;

[0082] The step of controlling the liquid supply assembly 200 to provide alkaline liquid further includes: controlling the first valve 240 to open, so that the liquid in the water storage chamber 210 and the liquid in the alkaline liquid chamber 230 enter the liquid inlet hole 110 .

[0083] Preferably, when the liquid supply assembly 200 provides an acidic liquid or an alkaline liquid, the first valve 240 and the second valve 250 or the third valve 260 are opened simultaneously, and the provided acidic liquid or alkaline liquid mixes with the cooling water to form a mixed liquid of corresponding pH, which then flows into the interior of the housing 100 through the liquid inlet 110. In this manner, while ensuring that the liquid of corresponding pH is formed, the amount of acidic liquid and alkaline liquid used can be reduced, thereby saving acidic liquid and alkaline liquid and reducing costs.

[0084] It should be noted here that when the liquid supply component 200 provides acidic liquid, the sum of the flow rate of the acidic liquid and the flow rate of the cooling water is equal to the initial value of the liquid supply flow rate; when the liquid supply component 200 provides alkaline liquid, the sum of the flow rate of the alkaline liquid and the flow rate of the cooling water is equal to the initial value of the liquid supply flow rate to ensure the cooling effect.

[0085] In some embodiments, the control method further includes: when the mechanical seal cooling system is started, controlling the liquid supply component 200 to provide acidic liquid to the liquid inlet hole 110 at an initial value of the liquid supply flow rate, and after a third time period, controlling the liquid supply component 200 to provide acidic liquid; and executing the step of controlling the liquid supply component 200 to supply liquid to the liquid inlet hole 110 at the initial value of the liquid supply flow rate after the first time period.

[0086] It should be noted that if impurities such as scale or crystals are present in the cooling water, and if they were not completely removed during the previous use, they will adhere to the surface of the mechanical seal structure. If there is a large amount of scale, it will directly drive the mechanical seal structure to operate, potentially causing damage to the mechanical seal structure. Preferably, when the mechanical seal cooling system is activated, an acidic liquid is first provided through the liquid supply assembly 200 to remove the scale remaining from the previous use, effectively improving the safety of use and preventing damage.

[0087] 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.

[0088] 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 water supply control method for a mechanical seal cooling system, characterized in that: The mechanical seal cooling system includes a housing, a liquid supply assembly, a sealing friction pair, and a temperature sensor. The housing has a liquid inlet opening on its sidewall, the sealing friction pair is disposed within the housing, the liquid supply assembly is in communication with the liquid inlet opening, the liquid inlet opening and the sealing friction pair are disposed correspondingly so that liquid passing through the liquid inlet opening can contact the sealing friction pair, and the temperature sensor is in contact with the sealing friction pair. The water supply control method comprises: Step S1: After a first time period, control the liquid supply component to supply liquid to the liquid inlet at an initial liquid supply flow rate, and after a second time period, stop the liquid supply operation; Step S2: obtaining a detected temperature value through the temperature sensor; if the detected temperature value is greater than or equal to a preset temperature standard value, updating at least one of the first time period and the second time period so that the ratio of the first time period to the second time period is reduced; if the detected temperature value is less than the preset temperature standard value, updating at least one of the first time period and the second time period so that the ratio of the first time period to the second time period is increased; Step S3: Return to execute step S1.

2. The water supply control method for a mechanical seal cooling system according to claim 1, characterized in that: The step of updating at least one of the first time period and the second time period to reduce the ratio of the first time period to the second time period includes: shortening the first time period by a predetermined time difference and / or lengthening the second time period by the predetermined time difference; The step of updating at least one of the first time period and the second time period to increase the ratio of the first time period to the second time period includes: extending the first time period by the predetermined time difference and / or shortening the second time period by the predetermined time difference.

3. The water supply control method for a mechanical seal cooling system according to claim 2, characterized in that: After the step of shortening the first time period by a predetermined time difference and / or extending the second time period by the predetermined time difference, the method further includes: comparing the first time period with a time period threshold, and if the first time period is less than or equal to the time period threshold, extending the first time period by the predetermined time difference and extending the second time period by the predetermined time difference; The step of extending the first time period by the predetermined time difference and / or shortening the second time period by the predetermined time difference further includes: comparing the second time period with the time period threshold; if the second time period is less than or equal to the time period threshold, extending the second time period by the predetermined time difference and extending the first time period by the predetermined time difference.

4. The water supply control method for a mechanical seal cooling system according to claim 1, characterized in that: It also includes a spring, and the sealing friction pair includes a dynamic ring and a static ring. The static ring is fixedly connected to the inner wall of the shell, the dynamic ring abuts one side of the static ring, and the spring abuts the side of the dynamic ring facing away from the static ring; the initial value of the liquid supply flow is determined according to the spring specific pressure of the spring, the pressure of the liquid entering the liquid inlet hole, the inner diameter of the dynamic ring, the outer diameter of the dynamic ring, and the relative rotation speed of the dynamic ring and the static ring.

5. The water supply control method for a mechanical seal cooling system according to claim 1, characterized in that: The mechanical seal cooling system further includes a pressure pump, and the liquid supply component, the pressure pump and the liquid inlet are connected in sequence; The liquid supply operation includes: the liquid provided by the liquid supply component flows through the pressure pump, the pressure pump is controlled to adjust the pressure of the flowing liquid, and the liquid processed by the pressure pump flows into the liquid inlet hole.

6. The water supply control method for a mechanical seal cooling system according to claim 5, characterized in that: The mechanical seal cooling system further includes a pressure transmitter and a pressure sensor, wherein the pressure pump, the pressure transmitter and the liquid inlet are sequentially connected, and the pressure sensor is disposed in the housing and contacts the liquid passing through the liquid inlet; Before the step of allowing the liquid processed by the pressure pump to flow into the liquid inlet hole, the method further includes: causing the liquid processed by the pressure pump to flow through the pressure transmitter, obtaining a pressure value of the liquid flowing through the pressure transmitter and recording it as a first pressure value; obtaining a pressure value of the liquid in the housing through the pressure sensor and recording it as a second pressure value; The step of controlling the booster pump to adjust the pressure of the liquid flowing through it includes: recording the sum of the second pressure value and the preset pressure difference as a third pressure value, comparing the first pressure value with the third pressure value, and controlling the booster pump to adjust the pressure of the liquid flowing through the booster pump to the third pressure value.

7. The water supply control method for a mechanical seal cooling system according to any one of claims 1 to 6, characterized in that: The mechanical seal cooling system further includes a pH sensor, which is disposed inside the housing and contacts the liquid passing through the liquid inlet. The liquid supply operation includes: The pH sensor detects the pH of the liquid in the shell cavity. When the pH of the liquid is greater than the preset pH standard value, the liquid supply component is controlled to provide acidic liquid; when the pH of the liquid is less than the preset pH standard value, the liquid supply component is controlled to provide alkaline liquid; when the pH of the liquid is equal to the preset pH standard value, the liquid supply component is controlled to provide neutral liquid.

8. The water supply control method for a mechanical seal cooling system according to claim 7, characterized in that: The liquid supply assembly includes a water storage chamber, an acid chamber, an alkaline chamber, a first valve, a second valve, and a third valve. The water storage chamber, the first valve, and the liquid inlet are sequentially connected; the acid chamber, the second valve, and the liquid inlet are sequentially connected; and the alkaline chamber, the third valve, and the liquid inlet are sequentially connected. The step of controlling the liquid supply component to provide acidic liquid includes: controlling the second valve to open so that the liquid in the acid liquid chamber flows into the liquid inlet hole; the step of controlling the liquid supply component to provide alkaline liquid includes: controlling the third valve to open so that the liquid in the alkaline liquid chamber flows into the liquid inlet hole; the step of controlling the liquid supply component to provide neutral liquid includes: controlling the first valve to open so that the liquid in the water storage chamber flows into the liquid inlet hole.

9. The water supply control method for a mechanical seal cooling system according to claim 8, characterized in that: The step of controlling the liquid supply assembly to provide acidic liquid further includes: controlling the first valve to open so that the liquid in the water storage chamber and the liquid in the acid liquid chamber enter the liquid inlet hole; The step of controlling the liquid supply component to provide alkaline liquid further includes: controlling the first valve to open so that the liquid in the water storage chamber and the liquid in the alkaline liquid chamber enter the liquid inlet hole.

10. The water supply control method for a mechanical seal cooling system according to claim 7, characterized in that: The control method also includes: when the mechanical seal cooling system is started, controlling the liquid supply component to provide acidic liquid to the liquid inlet hole at an initial value of the liquid supply flow rate, and after a third time period, controlling the liquid supply component to provide acidic liquid; and executing the step of controlling the liquid supply component to supply liquid to the liquid inlet hole at the initial value of the liquid supply flow rate after the first time period.

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