Water guide bearing oil level measuring device

Abstract

The utility model discloses a water guide bearing oil level measuring device, and relates to the technical field of water guide bearing oil level measurement. The water guide bearing oil level measuring device comprises an oil level indicator body fixed above a water guide bearing oil tank, the bottom of the oil level indicator body is provided with an upper connecting rod which extends downwards and can move up and down, the upper connecting rod is provided with an inertia mass block, and the lower end of the upper connecting rod is connected with a spring damper; a filtering cylinder is fixed in the water guide bearing oil tank, an oil through hole located below the oil level is formed in the filtering cylinder, a floating ball is arranged in the filtering cylinder, a lower connecting rod upwards penetrating through the top wall of the water guide bearing oil tank is fixed to the floating ball, and the upper end of the lower connecting rod is connected with a spring damper. According to the invention, the inertial mass block and the spring damper are matched and combined with the filtering cylinder to form a set of over-damping system, so that the interference of vibration of the hydroelectric generating set and severe fluctuation of the oil level on a measurement result is effectively inhibited, serious data jump during oil level measurement is avoided, and the accuracy of oil level measurement is improved.

Description

Technical Field

[0001] This application relates to the field of water-guided bearing oil level measurement technology, specifically to a water-guided bearing oil level measurement device. Background Technology

[0002] The water-guided bearing of a hydroelectric generator set is one of the key components ensuring the stable operation of the unit, and accurate measurement of its oil level is crucial for the safe operation of the equipment. Traditionally, the method for measuring the oil level of the water-guided bearing is to open a mounting hole in the top of the water-guided bearing oil tank and install a float-connecting rod magnetic level gauge in a top-mounted manner to measure the oil level.

[0003] However, during operation, the water guide bearings of hydroelectric generator sets experience significant vibrations and oil level fluctuations, causing the float connecting rod to oscillate violently. This can easily lead to severe data jumps, making it impossible to accurately reflect the actual oil level. In severe cases, this can damage the magnetic flip device. Furthermore, this inaccurate measurement not only affects the normal operation of the equipment but may also cause unit malfunctions or shutdowns due to false alarms or missed alarms. Utility Model Content

[0004] The purpose of this application is to provide a water-guided bearing oil level measuring device to solve the problem of serious data jumps during oil level measurement.

[0005] The technical solution adopted by this application to solve its technical problem is:

[0006] A water-guided bearing oil level measuring device includes an oil level gauge body fixed above the water-guided bearing oil tank. The bottom of the oil level gauge body has a downwardly extending and vertically movable upper connecting rod. An inertial mass block is provided on the upper connecting rod, and a spring damper is connected to the lower end of the upper connecting rod.

[0007] A filter cylinder is fixed inside the water-guided bearing oil tank. The filter cylinder has an oil passage hole located below the oil surface. A float is installed inside the filter cylinder. A lower connecting rod is fixed on the float, passing upward through the top wall of the water-guided bearing oil tank. The upper end of the lower connecting rod is connected to the spring damper.

[0008] Furthermore, the filter cylinder is a vertically oriented structure with openings at both the top and bottom, and the lower end of the filter cylinder is sealed to the bottom wall of the water-guided bearing oil tank.

[0009] Furthermore, the top of the filter cylinder is sealed to the top wall of the water-conducting bearing oil tank, and a vent hole is provided on the filter cylinder adjacent to the top wall of the water-conducting bearing oil tank.

[0010] Furthermore, the inertial mass block is disposed at the upper end of the upper connecting rod.

[0011] Furthermore, the oil level gauge body includes a mounting base slidably connected to the upper connecting rod, an oil level indicator disposed on the upper connecting rod, and an oil level display disposed on the mounting base and cooperating with the oil level indicator. The mounting base is fixed above the water guide bearing oil tank.

[0012] Furthermore, the oil level indicator includes an oil level pointer, and the oil level display includes an oil level scale; and / or, the oil level indicator includes an electrical signal sensor, and the oil level display includes an electrical signal transmitter.

[0013] Furthermore, the oil level gauge body is fixed to the top of the water-conducting bearing oil tank.

[0014] Furthermore, the oil level gauge body is detachably connected to the water-conducting bearing oil tank.

[0015] Furthermore, the surfaces of the float, the lower connecting rod, and the filter cylinder are all provided with a lubricating coating.

[0016] Furthermore, the lubricating coating includes a Teflon coating.

[0017] The beneficial effects of this application are:

[0018] The water-guided bearing oil level measuring device provided in this application embodiment, by setting an inertial mass block on the upper connecting rod, setting a spring damper between the upper and lower connecting rods, setting a filter cylinder inside the water-guided bearing oil tank, and setting a float inside the filter cylinder, can form an overdamped system by using the cooperation of the inertial mass block and the spring damper in combination with the filter cylinder. This effectively suppresses the interference caused by the vibration of the hydro-generator unit and the violent fluctuation of the oil level on the measurement results, avoids serious data jumps during oil level measurement, improves the accuracy of oil level measurement, and thus truly reflects the actual oil level in the water-guided bearing oil tank. This provides reliable data support for the safe and stable operation of the hydro-generator unit and improves the safety and reliability of equipment operation. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the structure of the water-conducting bearing oil level measuring device provided in the embodiments of this application;

[0021] Figure 2 This is a comparison chart of the measured oil levels of Example 1 and Comparative Example 1.

[0022] Figure label:

[0023] 1-Water-guided bearing oil tank;

[0024] 11-Mounting holes;

[0025] 2- Oil level gauge body;

[0026] 21-Mounting base; 22-Oil level indicator; 23-Oil level display;

[0027] 3-Upper connecting rod;

[0028] 4-Spring damper;

[0029] 5-Filter cylinder;

[0030] 51 - Oil passage hole; 52 - Vent hole;

[0031] 6-Float;

[0032] 7-Lower connecting rod;

[0033] 8-Inertial mass block. Detailed Implementation

[0034] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application. Unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other.

[0035] In the description of this application, the terms "upper," "lower," "left," "right," "front," "rear," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. Unless otherwise specified, the above-mentioned orientational descriptions can be flexibly set in actual application, provided that the relative positional relationships shown in the accompanying drawings are satisfied.

[0036] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "set up," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0037] The water-guided bearing oil tank 1 stores lubricating oil, which provides lubrication and cooling for the water-guided bearing. The oil level in the oil tank 1 is crucial for the normal operation of the water-guided bearing lubrication system. If the oil level is too low, insufficient lubrication may occur, leading to overheating or even damage. Conversely, if the oil level is too high, it may increase the risk of lubricating oil leakage. Therefore, the oil level in the water-guided bearing oil tank 1 needs to be measured during the operation of the water-guided bearing.

[0038] Traditionally, the oil level in the water-guided bearing oil tank 1 is measured by creating a mounting hole 11 at the top of the tank and installing a float-connecting rod magnetic level gauge. However, during the operation of the water-guided bearing, significant vibrations and oil level fluctuations cause the float-connecting rod to move violently up and down, easily resulting in severe data jumps and inaccurate readings of the actual oil level. This inaccurate measurement not only affects the normal operation of the equipment but may also lead to unit malfunctions or shutdowns due to false alarms or missed alarms.

[0039] Based on this, see Figure 1 This application provides a water-guided bearing oil level measuring device, including an oil level gauge body 2 fixed above the water-guided bearing oil tank 1. The bottom of the oil level gauge body 2 has an upper connecting rod 3 that extends downward and can move up and down. An inertial mass block 8 is provided on the upper connecting rod 3. A spring damper 4 is connected to the lower end of the upper connecting rod 3. A filter cylinder 5 is fixed inside the water-guided bearing oil tank 1. The filter cylinder 5 has an oil passage hole 51 located below the oil surface. A float ball 6 is provided inside the filter cylinder 5. A lower connecting rod 7 that passes upward through the top wall of the water-guided bearing oil tank 1 is fixed on the float ball 6. The upper end of the lower connecting rod 7 is connected to the spring damper 4.

[0040] Specifically, the oil level gauge body 2 is installed on top of the water guide bearing oil tank 1 in a top-mounted manner. The oil level is displayed on the oil level gauge body 2 by moving the upper connecting rod 3 at the bottom of the oil level gauge body 2 up and down.

[0041] The filter cylinder 5 is fixed inside the water-guided bearing oil tank 1. An oil passage hole 51 is provided on the wall of the filter cylinder 5, located below the oil level, to connect the inner cavity of the water-guided bearing oil tank 1 with the inner cavity of the filter cylinder 5. Lubricating oil in the water-guided bearing oil tank 1 can enter the filter cylinder 5 through the oil passage hole 51, ensuring that the oil level in the water-guided bearing oil tank 1 is consistent with the oil level in the filter cylinder 5. Simultaneously, the filter cylinder 5 also smooths out oil level fluctuations within the water-guided bearing oil tank 1, thus mitigating oil level fluctuations within the filter cylinder 5.

[0042] A float 6 is installed inside the filter cylinder 5, allowing it to float on the oil surface and move up and down with changes in oil level. A lower connecting rod 7 extending upwards is fixed to the float 6. The upper end of the lower connecting rod 7 passes through a mounting hole 11 on the top wall of the water-guided bearing oil tank 1 and extends above the water-guided bearing oil tank 1. The lower connecting rod 7 can move up and down within the mounting hole 11. The upper end of the lower connecting rod 7 is connected to the lower end of the spring damper 4, and the upper end of the spring damper 4 is connected to the lower end of the upper connecting rod 3. An inertial mass block 8 is installed on the upper connecting rod 3. For example, the inertial mass block 8 is installed at the upper end of the upper connecting rod 3. Of course, the inertial mass block 8 can also be installed at other positions on the upper connecting rod 3.

[0043] When the float 6 moves up and down with the change of oil level, the damping effect of the spring damper 4 and the inertial effect of the inertial mass block 8 can absorb and dissipate the vibration and the energy transmitted to the upper connecting rod 3 by the float 6 as the oil level fluctuates. This reduces the up and down movement of the upper connecting rod 3 caused by vibration and oil level fluctuation, thereby suppressing the data jump of the oil level gauge body 2 and improving the accuracy of measurement.

[0044] The water-guided bearing oil level measuring device provided in this application embodiment, by setting an inertial mass block 8 on the upper connecting rod 3, setting a spring damper 4 between the upper connecting rod 3 and the lower connecting rod 7, setting a filter cylinder 5 in the water-guided bearing oil tank 1, and setting a float 6 in the filter cylinder 5, can form an overdamped system by using the cooperation of the inertial mass block 8 and the spring damper 4 in combination with the filter cylinder 5. This effectively suppresses the interference caused by the vibration of the hydro-generator unit and the violent fluctuation of the oil level on the measurement results, avoids serious data jumps during oil level measurement, improves the accuracy of oil level measurement, and thus truly reflects the actual oil level in the water-guided bearing oil tank. This provides reliable data support for the safe and stable operation of the hydro-generator unit and improves the safety and reliability of equipment operation.

[0045] In some embodiments, see Figure 1The filter cylinder 5 is a vertically oriented structure with openings at both the top and bottom. The lower end of the filter cylinder 5 is sealed to the bottom wall of the water bearing oil tank 1. An oil passage 51 is located near the bottom wall of the water bearing oil tank 1. There can be an installation gap between the upper end of the filter cylinder 5 and the top wall of the water bearing oil tank 1, ensuring consistent air pressure between them. For example, the top of the filter cylinder 5 can be sealed to the top wall of the water bearing oil tank 1. A vent 52 is located on the filter cylinder 5 near the top wall of the water bearing oil tank 1, ensuring consistent air pressure between them. This consistent air pressure design ensures that the oil level in the filter cylinder 5 is consistent with the oil level in the water bearing oil tank 1, ensuring that the float 6 accurately reflects the oil level in the water bearing oil tank 1.

[0046] In some embodiments, see Figure 1 The oil level gauge body 2 includes a mounting base 21 slidably connected to the upper connecting rod 3, an oil level indicator 22 mounted on the upper connecting rod 3, and an oil level display 23 mounted on the mounting base 21 and cooperating with the oil level indicator 22. The mounting base 21 is fixed above the water guide bearing oil tank 1. During operation, the float 6 moves up and down with the oil level. When the float 6 moves, it drives the lower connecting rod 7, the spring damper 4, the upper connecting rod 3, and the oil level indicator 22 to move up and down. A relative displacement is generated between the oil level indicator 22 and the oil level display 23. With the cooperation of the two, the displacement of the float 6 is converted into readable oil level information, which intuitively displays the current oil level.

[0047] In other embodiments, the oil level gauge body 2 can also directly adopt the float connecting rod magnetic level gauge with the float ball removed in the prior art, which is installed on top of the water guide bearing oil tank 1 in a top-mounted manner, and the connecting rod of the oil level gauge serves as the upper connecting rod 3.

[0048] The oil level gauge body 2 can be a mechanical oil level gauge or an electronic oil level gauge. In some embodiments, the oil level indicator 22 includes an oil level pointer, and the oil level display 23 includes an oil level scale; and / or, the oil level indicator 22 includes an electrical signal sensor, and the oil level display 23 includes an electrical signal transmitter.

[0049] When the oil level indicator 22 is the oil level pointer and the oil level display 23 is the oil level scale, the oil level pointer moves along the oil level scale during operation, and the current oil level can be intuitively displayed through the oil level scale. This mechanical oil level gauge not only makes it easy for operators to quickly read the oil level, but also has a simple structure, making it suitable for use in various working conditions, especially in environments without power.

[0050] When the oil level indicator 22 functions as an electrical signal sensor and the oil level display 23 functions as an electrical signal transmitter, during operation, the electrical signal sensor detects changes in oil level, converts these changes into electrical signals, and transmits them to the electrical signal transmitter. The electrical signal transmitter then converts the electrical signals into visual oil level information, which is displayed on the oil level display 23 digitally or graphically. This electronic oil level gauge not only achieves accurate oil level measurement through a high-precision sensor but can also be integrated with computer systems or automation systems to achieve intelligent management.

[0051] The oil level gauge body 2 is mounted on the water-conducting bearing oil tank 1 and can be fixed to the foundation by a support frame. In some embodiments, the oil level gauge body 2 is fixed to the top of the water-conducting bearing oil tank 1. Exemplarily, the oil level gauge body 2 is detachably connected to the water-conducting bearing oil tank 1. For example, the oil level gauge body 2 is connected to the water-conducting bearing oil tank 1 via a flange bolt structure. The detachable connection structure makes it easier to replace the oil level gauge body 2. When the oil level gauge body 2 malfunctions or needs to be upgraded, it can be quickly removed for repair or replacement without disassembling or overhauling the entire oil tank.

[0052] In some embodiments, the surfaces of the float 6, lower connecting rod 7, and filter cylinder 5 are all provided with a lubricating coating. Exemplarily, the lubricating coating includes a Teflon coating. The lubricating coating can reduce the coefficient of friction between the float 6, lower connecting rod 7, and filter cylinder 5, making the movement of the float 6 and lower connecting rod 7 smoother and more accurate in reflecting oil level changes. The float 6, lower connecting rod 7, and filter cylinder 5 can be made of lightweight materials such as aluminum alloy.

[0053] The water-guided bearing oil level measuring device provided in this application embodiment can also be represented by the following mathematical model:

[0054]

[0055] The initial oil level in the water-guided bearing oil tank 1 is denoted as x(t).

[0056] The pre-filtering stage formed by the filter cylinder 5 is a first-order inertial stage, whose transfer function is denoted as F(s). The filtering time constant Ta is related to the structure of the device and factors such as the viscosity coefficient of the lubricating oil and the friction coefficient of the lubricating coating, and can be determined by model or field test.

[0057] Where F(s) = 1 / (Ta·s+1).

[0058] The spring damping and inertial mass device, consisting of spring damper 4 and inertial mass block 8, has a transfer function denoted as G(s), a spring stiffness coefficient of k, a damping coefficient of c, and a mass of m.

[0059] Where G(s)=(cs+k) / (ms)2 +cs+k).

[0060] The measured oil level of the water-guided bearing is denoted as y(t).

[0061] As can be seen from the above model, the water-guided bearing oil level measuring device provided in this application embodiment can enter an overdamped state by selecting a suitable filter time constant Ta, spring stiffness coefficient k, damping coefficient c, and inertial mass block mass m, thus ensuring that the oil level measurement does not oscillate or overshoot.

[0062] Example 1:

[0063] The oil level of a water-conducting bearing in an oil tank 1 of a water-conducting bearing was measured using the water-conducting bearing oil level measuring device provided in this application embodiment. The filter time constant Ta = 3s, spring stiffness coefficient k = 4N / m, damping coefficient c = 5N·s / m, and the mass of the inertial mass block m = 1kg were selected. The oil level measurement results are as follows: Figure 2 The dotted line in the text is shown.

[0064] Comparative Example 1:

[0065] A traditional float-connector magnetic level gauge was used to measure the oil level in a water-conducting bearing oil tank 1. Due to violent fluctuations in the oil level within tank 1, the magnet at the top of the float-connector moved violently up and down, causing the magnetic level indicator to fail to move or return in time, resulting in abnormal oil level indication and measurement. The oil level measurement results are as follows: Figure 2 As shown by the solid line in the image.

[0066] from Figure 2 As can be seen, compared with the prior art, the water guide bearing oil level measuring device provided in this application embodiment can effectively suppress the interference caused by the vibration of the hydro-generator unit and the violent fluctuation of the oil level on the measurement results, avoid serious data jumps during oil level measurement, improve the accuracy of oil level measurement, and thus truly reflect the actual oil level in the water guide bearing oil tank, providing reliable data support for the safe and stable operation of the hydro-generator unit, and improving the safety and reliability of equipment operation.

[0067] The above are merely specific embodiments of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application.

Claims

1. A water-conducting bearing oil level measuring device, characterized in that, Includes an oil level gauge body (2) fixed above the water guide bearing oil tank (1), the bottom of the oil level gauge body (2) has an upper connecting rod (3) that extends downward and can move up and down, an inertial mass block (8) is provided on the upper connecting rod (3), and a spring damper (4) is connected to the lower end of the upper connecting rod (3). A filter cylinder (5) is fixed inside the water-guided bearing oil tank (1). The filter cylinder (5) has an oil passage hole (51) located below the oil surface. A float (6) is provided inside the filter cylinder (5). A lower connecting rod (7) is fixed on the float (6) and passes upward through the top wall of the water-guided bearing oil tank (1). The upper end of the lower connecting rod (7) is connected to the spring damper (4).

2. The water-guided bearing oil level measuring device according to claim 1, characterized in that, The filter cylinder (5) is a vertically arranged structure with openings at both the top and bottom. The lower end of the filter cylinder (5) is sealed to the bottom wall of the water guide bearing oil tank (1).

3. The water-conducting bearing oil level measuring device according to claim 2, characterized in that, The top of the filter cylinder (5) is sealed to the top wall of the water guide bearing oil tank (1), and a vent hole (52) is provided on the filter cylinder (5) adjacent to the top wall of the water guide bearing oil tank (1).

4. The water-guided bearing oil level measuring device according to claim 1, 2 or 3, characterized in that, The inertial mass block (8) is located at the upper end of the upper connecting rod (3).

5. The water-guided bearing oil level measuring device according to claim 1, 2 or 3, characterized in that, The oil level gauge body (2) includes a mounting base (21) slidably connected to the upper connecting rod (3), an oil level indicator (22) provided on the upper connecting rod (3), and an oil level display (23) provided on the mounting base (21 and cooperating with the oil level indicator (22). The mounting base (21) is fixed above the water guide bearing oil tank (1).

6. The water-guided bearing oil level measuring device according to claim 5, characterized in that, The oil level indicator (22) includes an oil level pointer, and the oil level display (23) includes an oil level scale; and / or, the oil level indicator (22) includes an electrical signal sensor, and the oil level display (23) includes an electrical signal transmitter.

7. The water-guided bearing oil level measuring device according to claim 1, characterized in that, The oil level gauge body (2) is fixed on the top of the water-guided bearing oil tank (1).

8. The water-guided bearing oil level measuring device according to claim 7, characterized in that, The oil level gauge body (2) is detachably connected to the water-conducting bearing oil tank (1).

9. The water-guided bearing oil level measuring device according to claim 1, characterized in that, The surfaces of the float (6), the lower connecting rod (7), and the filter cylinder (5) are all provided with a lubricating coating.

10. The water-guided bearing oil level measuring device according to claim 9, characterized in that, The lubricating coating includes a Teflon coating.

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