Leakage rate measuring device of stern shaft sealing device

Abstract

The utility model relates to a leakage rate measuring device of a stern shaft sealing device, which comprises a leakage rate real-time measuring and displaying system, a maximum average leakage rate measuring and on-site displaying system in specified stage time and a base self-adaptive measuring mechanism. Displaying and storing the current leakage rate; the maximum average leakage rate measurement and field display system in the specified stage time is used for measuring, displaying and transmitting the maximum average leakage rate in the stage time; the base self-adaptive measurement mechanism is used for a leakage rate real-time measurement and display system and a maximum average leakage rate measurement and field display system in a specified stage time on the base self-adaptive measurement mechanism, and the vertical line state is kept constantly. The device has the functions of measuring and displaying the real-time leakage rate, and storing and transmitting the maximum average leakage rate and historical leakage rate data in the stage time, so as to meet the requirements of automatic low-leakage-rate performance testing and subsequent performance data analysis of the stern shaft sealing device.

Description

Technical Field

[0001] The utility model relates to a stern shaft sealing device for a ship power propulsion system, in particular to a leakage amount testing device for a stern shaft sealing device of a ship power propulsion system. Background Technique

[0002] The stern shaft sealing device is used for sealing the part where the shafting of a propeller-driven ship passes through the stern tube to isolate seawater from entering the cabin, and is one of the main devices of the ship shafting. The performance of the stern shaft sealing device is closely related to the operating state of the stern shaft. It is necessary to test the performance of the stern shaft sealing device, especially the leakage amount performance, under simulated operating conditions on a test bench. Since the leakage amount of the stern shaft sealing device is small, generally within 10 L / h, there is no general-purpose flowmeter available for selection at present. Generally, the liquid leaked from the stern shaft sealing device within a certain period of time is collected, and then the total volume is manually measured with a measuring cup, and finally the average flow rate is calculated. At present, the measurement method of the leakage amount of the stern shaft sealing device is time-consuming and laborious, and it is impossible to display the leakage amount in real time and store historical data.

[0003] Aiming at the technical difficulty that it is difficult to automatically test the small leakage amount of the stern shaft sealing device with a general-purpose flowmeter, it is necessary to design a leakage amount measuring device that meets the requirements of low leakage amount and automatic testing of the stern shaft sealing device, which has functions such as measuring, displaying the real-time leakage amount, the maximum average leakage amount within a specified stage time, storing and transmitting historical leakage amount data, so as to meet the requirements of low leakage amount performance testing of the stern shaft sealing device and subsequent performance data analysis. Summary of the Invention

[0004] According to the characteristics of small leakage of the stern shaft sealing device, the utility model provides a leakage amount measuring device for the stern shaft sealing device, which has functions such as measuring, displaying the real-time leakage amount, the maximum average leakage amount within a specified stage time, storing and transmitting historical leakage amount data, so as to meet the requirements of automatic testing of the low leakage amount performance of the stern shaft sealing device and subsequent performance data analysis.

[0005] To achieve the above object, the technical solution of the utility model is: a leakage amount measuring device for a stern shaft sealing device, including a real-time leakage amount measuring and displaying system, a maximum average leakage amount measuring and on-site displaying system within a specified stage time, and a base adaptive measuring mechanism.

[0006] The real-time leakage amount measuring and displaying system is used to collect and measure the change in volume in the collecting box, and display and store the current leakage amount.

[0007] The maximum average leakage amount measuring and on-site displaying system within a specified stage time is used to measure, display and transmit the maximum average leakage amount within the stage time.

[0008] The base adaptive measurement mechanism is used for the real-time measurement and display system of the leakage amount thereon and the measurement and on-site display system of the maximum average leakage amount within a specified stage time, and always maintains a vertical state.

[0009] Furthermore, the real-time measurement and display system of the leakage amount includes a collection box body, a liquid level sensor, a control display, and a solenoid valve II. The collection box body is provided with a liquid level sensor, and the solenoid valve II is arranged at the bottom. The liquid level sensor is connected to the control display.

[0010] Furthermore, the measurement and on-site display system of the maximum average leakage amount within a specified stage time includes a solenoid valve I, a sphere, a limit plug, a maximum leakage amount display tube, a collection box body, a control display, and a solenoid valve II. The sphere, the limit plug, and the collection box body form a one-way valve. The main body of the collection box body is connected to the maximum leakage amount display tube through the one-way valve, and the maximum leakage amount display tube is connected to the bottom of the collection box body through the solenoid valve I and the solenoid valve II. The solenoid valve I and the solenoid valve II are connected to the control display.

[0011] Furthermore, the bottom of the collection box body adopts a conical structure.

[0012] Furthermore, the top of the collection box body adopts a conical structure.

[0013] Furthermore, an overflow port is arranged at the upper part of the collection box body and is incorporated into the drain port.

[0014] Furthermore, the base adaptive measurement mechanism includes a bracket, a collection box body, and a ball bearing. The top of the collection box body is connected to the bracket through the ball bearing, enabling the collection box body to rotate through the ball bearing and always maintain a vertical state.

[0015] Furthermore, an angle limit mechanism for the rotation of the collection box body is formed between the outside of the conical structure at the top of the collection box body and the top of the bracket.

[0016] Furthermore, the control display is set with two power supply modes: battery or external power supply.

[0017] Furthermore, three buttons, namely "Start", "Reset", and "End", are set on the control display panel, corresponding to three working states: the start of the leakage amount measurement, the measurement of the maximum average leakage amount within the stage time, and the end of the leakage amount measurement respectively.

[0018] The beneficial effects of the present utility model are:

[0019] The leakage measurement device for the stern shaft sealing device of the present utility model adopts structures or systems such as a real-time leakage measurement and display system, a maximum average leakage measurement and on-site display system within a specified stage time, a base adaptive measurement mechanism, etc., realizing functions such as measuring and displaying the real-time leakage amount, the maximum average leakage amount within the stage time, adaptively adjusting to the unevenness of the measurement device placement plane, and storing and transmitting historical leakage amount data. It has the characteristics of simple and reliable on-site operation, and can meet the requirements of automatic testing of the low-leakage performance of the stern shaft sealing device under the condition of power supply or no power supply on-site and subsequent performance data analysis. Brief Description of the Drawings

[0020] Figure 1 is a schematic structural diagram of the leakage measurement device for the stern shaft sealing device of the present utility model;

[0021] Figure 2 is Figure 1 a schematic diagram of the operation panel of the control display in

[0022] Figure 3 is a schematic diagram of the mechanism principle of the main mechanical components of the leakage measurement device for the stern shaft sealing device of the present utility model. Detailed Embodiment

[0023] The present utility model will be further described below in conjunction with the drawings and embodiments.

[0024] As Figures 1 to 3 shown, a leakage measurement device for a stern shaft sealing device provided by an embodiment of the present utility model includes a bracket 1, a solenoid valve 1 2, a sphere 3, a limit plug 4, a maximum leakage display tube 5, a collection box 6, a ball bearing 7, a liquid level sensor 8, a control display 9, a solenoid valve 2 10, etc. Among them, Figure 1 the sphere 3, the limit plug 4, and the collection box 6 in form a check valve, that is, Figure 3 the check valve V1 in.

[0025] As Figure 1 、 Figure 3As shown in the figure, components such as the acquisition box 6, liquid level sensor 8, control display 9, and solenoid valve II 10 form a real-time leakage measurement and display system. The acquisition box 6 is equipped with a liquid level sensor 8, and a solenoid valve II 10 is provided at the bottom. The liquid level sensor 8 is connected to the control display 9. The control system of the control display 9 collects the signals of the liquid level sensor 8 to measure the change in volume in the acquisition box. According to the leakage measurement range, the solenoid valve II 10 is periodically controlled to discharge the collected liquid in the acquisition box 6 to prevent the collected liquid from overflowing due to exceeding the measurement range. Finally, it is converted into the current leakage amount and displayed and stored. Among them, the bottom of the acquisition box 6 is designed with a conical structure to improve the measurement accuracy of the lower limit value within the measurement range and adapt to different leakage measurement requirements; the top of the acquisition box 6 is designed with a conical structure, which can increase the collection range of the leaked liquid of the stern shaft sealing device and improve the measurement accuracy; at the same time, an overflow port is set at the upper part of the acquisition box 6 and incorporated into the drain port to prevent the liquid collected by the leakage measurement device from overflowing abnormally at the top due to over-range use. Finally, the real-time measurement and display function of the low leakage amount of the stern shaft seal within the specified range is realized.

[0026] As Figure 1 , Figure 3 shown in the figure, components such as solenoid valve I 2, sphere 3, limit plug 4, maximum leakage amount display tube 5, acquisition box 6, control display 9, and solenoid valve II 10 form a system for measuring and on-site displaying the maximum average leakage amount within a specified stage time. The sphere 3, limit plug 4, and acquisition box 6 form a one-way valve V1. The main body of the acquisition box 6 is connected to the maximum leakage amount display tube 5 through the one-way valve V1. The maximum leakage amount display tube 5 is connected to the bottom of the acquisition box 6 through the solenoid valve I 2 and solenoid valve II 10. The solenoid valve I 2 and solenoid valve II 10 are connected to the control display 9. The liquid in the acquisition box 6 can flow into the maximum leakage amount display tube 5 through the sphere 3 and cannot flow back. The limit plug 4 ensures that the sphere 3 is not washed into the maximum leakage amount display tube 5 by the liquid in the acquisition box 6 and is restricted to move within a specified space, forming a one-way flow function. The height in the maximum leakage amount display tube 5 corresponds to the leakage amount value and can be displayed on-site. By controlling the solenoid valve I 2 through the control system of the control display 9, first, the liquid in the maximum leakage amount display tube 5 is emptied, and then the outflow channel at the lower end of the maximum leakage amount display tube 5 is closed to measure the maximum average leakage amount in the subsequent time stage. By controlling the on-off state of the solenoid valve II 10 at a certain period through the control system of the control display 9, only when the average leakage amount increases within the period, the liquid height of the maximum leakage amount display tube 5 will continue to rise, that is, the on-site display of the leakage amount becomes larger; on the contrary, when the average leakage amount does not increase within the period, due to the check function of the sphere 3, the liquid in the leakage amount display tube 5 is retained in the original position in the maximum leakage amount display tube 5, that is, the on-site display of the maximum leakage amount remains unchanged. Finally, the function of measuring and displaying the maximum average leakage amount within the stage time is realized.

[0027] Components such as the support 1, the acquisition box body 6, and the ball bearing 7 form a base adaptive measurement mechanism. The top of the acquisition box body 6 is connected to the support 1 through the ball bearing 7. Since the plane where the measuring device is placed may be inclined, at this time, under the action of the gravity of components such as the acquisition box body 6, components such as the acquisition box body 6 can rotate through the ball bearing 7 to always maintain a vertical state, thus ensuring the measurement accuracy; the external of the conical structure at the top of the acquisition box body 6 forms an angle limit mechanism for the rotation of components such as the acquisition box body 6 with the top of the support 1, which not only ensures the function of the base adaptive measurement mechanism but also avoids damage to the measuring device due to excessive rotational movement.

[0028] The control display 9 is set with two power supply modes: battery or external power supply, which can meet the measurement requirements of two measurement sites, namely, with external power supply and without external power supply in the laboratory and on the ship site. When the "Start" button on the operation panel of the control display 9 is operated, the leakage measurement device starts to measure. First, the solenoid valve 1 and the solenoid valve 2 are initialized, and the internal flow channels of the two solenoid valves are changed from the flowing state to the closed state. Then, the real-time leakage measurement and display system and the maximum average leakage measurement and on-site display system within a specified stage time are called to perform on-site real-time leakage measurement, start measuring the maximum average leakage measurement, display, storage, etc. under the current state; when the "Reset" button on the operation panel of the control display 9 is operated, the control system in the control display 9 opens the internal flow channel of the solenoid valve 1 for a certain time and then closes it, which can realize the maximum average leakage measurement and on-site display within the stage time after "Reset", and the real-time measurement and display system of the leakage measurement device is not affected; when the "End" button on the operation panel of the control display 9 is operated, the internal flow channels of the solenoid valve 1 and the solenoid valve 2 are in the open and maintained flowing state, and the real-time leakage measurement and display system, the maximum average leakage measurement and on-site display system within a specified stage time, and the leakage data storage work stop; through the data transmission interface on the control display 9, the leakage data stored inside the control display 9 can be transmitted to meet the need for subsequent performance data analysis of the stern shaft seal device leakage.

[0029] The automatic measurement of small leakage of the stern shaft seal device can be completed by the leakage measurement device of the stern shaft seal device. The functions of measuring and displaying the real-time leakage, the maximum average leakage within a stage time, the adaptive adjustment of the inclination of the plane where the measuring device is placed, and the storage and transmission of historical leakage data are realized. It has the characteristics of simple and reliable on-site operation and can meet the requirements of automatic testing of the low leakage performance of the stern shaft seal device and subsequent performance data analysis under the condition of power supply or no power supply on site.

Claims

1. A leakage measuring device for a stern shaft sealing device, characterized in that: Including real-time leakage measurement and display system, maximum average leakage measurement and on-site display system within a specified period of time, and base adaptive measurement mechanism, The real-time leakage measurement and display system is used to collect and measure the volume changes in the collection box, and display and store the current leakage; The maximum average leakage measurement and on-site display system within the specified stage time is used to measure, display and transmit the maximum average leakage within the stage time; The base adaptive measuring mechanism is used for the real-time leakage measurement and display system and the maximum average leakage measurement and on-site display system within a specified period of time, and keeps the vertical line state at all times.

2. The leakage measuring device for the stern shaft sealing device according to claim 1, characterized in that: The real-time leakage measurement and display system includes a collection box, a liquid level sensor, a control display, and two solenoid valves. The collection box is provided with a liquid level sensor, and two solenoid valves are provided at the bottom. The liquid level sensor is connected to the control display.

3. The leakage measuring device for the stern shaft sealing device according to claim 1, characterized in that: The maximum average leakage measurement and on-site display system within a specified stage time includes solenoid valve 1, a ball, a limit screw plug, a maximum leakage display tube, a collection box, a control display, and solenoid valve 2. The ball, the limit screw plug and the collection box form a one-way valve. The main body of the collection box is connected to the maximum leakage display tube through the one-way valve, and the maximum leakage display tube is connected to the bottom of the collection box through solenoid valve 1 and solenoid valve 2. Solenoid valve 1 and solenoid valve 2 are connected to the control display.

4. The leakage measuring device for a stern shaft sealing device according to claim 2 or 3, characterized in that: The bottom of the collection box adopts a cone-shaped structure.

5. The leakage measuring device for the stern shaft sealing device according to claim 4, characterized in that: The top of the collection box adopts a cone-shaped structure.

6. The leakage measuring device for a stern shaft sealing device according to claim 4, characterized in that: An overflow outlet is arranged on the upper part of the collection box and merges into the drain outlet.

7. The leakage measuring device for a stern shaft sealing device according to claim 1, characterized in that: The base adaptive measuring mechanism includes a bracket, a collection box, and a ball bearing. The top of the collection box is connected to the bracket through a ball bearing, so that the collection box can rotate through the ball bearing and keep a vertical state at all times.

8. The leakage measuring device for the stern shaft sealing device according to claim 7, characterized in that: The outside of the cone structure on the top of the collection box and the top of the bracket form an angle limiting mechanism for the rotation of the collection box.

9. The leakage measuring device for a stern shaft sealing device according to claim 2 or 3, characterized in that: Control the display to set the power supply mode to battery or external power.

10. The leakage measuring device for a stern shaft sealing device according to claim 9, characterized in that: The control panel of the control display is provided with three buttons: "Start", "Reset" and "End", which respectively correspond to the three working states of leakage measurement start, maximum average leakage measurement within the stage time and leakage measurement end.

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