High-linear-speed sealing device

Abstract

The utility model relates to a high linear speed sealing device which comprises an installation seat body, a spring assembly, a movable ring, a static ring seat and a static ring, the static ring and the movable ring form a sealing pair, a sealing ring is arranged between the static ring seat and the static ring, cooling water channels are respectively arranged on the installation seat body and the static ring seat, and the cooling water channel of the installation seat body is communicated with the cooling water channel on the static ring seat. The cooling water channel on the static ring seat is communicated with the working surfaces of the static ring and the moving ring sealing pair through the water channel of the static ring, so that cooling water can directly reach the working surfaces of the static ring and the moving ring sealing pair and take away friction heat of the sealing pair, and the cooling requirement of high friction heat of the sealing surface of the large-shaft-diameter high-linear-speed sealing device is met. And a displacement sensor and an infrared temperature sensor are arranged on the static ring seat, so that the requirements of sealing pair abrasion loss and sealing pair temperature real-time monitoring data required by fault pre-judgment and service life analysis of the sealing device are met.

Description

Technical Field

[0001] The utility model relates to a stern shaft end face sealing device of a ship power propulsion system, in particular to a high linear speed sealing device. Background Art

[0002] The stern shaft end face seal is used to seal the part of the propeller-propelled ship shaft passing through the stern tube to isolate seawater from entering the cabin. It is one of the main components of the ship shaft system. The stern shaft end face sealing device is a mechanical sealing device, which is composed of the contact surfaces of the static ring and the dynamic ring in the device to form a mechanical sealing pair, and cooling water is required to take away the heat generated by the end face sealing pair; the existing stern shaft end face sealing device mainly takes away most of the heat generated by the static ring and the dynamic ring sealing pair through the cooling water of the water inlet channel on the mounting seat body or the water flow formed by the cooling water on the water inlet channel of the static ring seat, such as the disclosed "Ship Stern Shaft Water Lubrication Sealing Device" (Announcement No. CN207762250U) and "Stern Shaft Sealing Device with Cooling Structure" (Announcement No. CN214367732U) patents; however, for the stern shaft end face sealing device with an extra-large shaft diameter, due to the high relative linear velocity between the static ring and the dynamic ring, the friction heat of the sealing pair generated is relatively large, and the cooling water design structure of the existing sealing device may not be able to take away the heat generated by the sealing pair in time, resulting in excessive temperature and damage to the sealing surfaces of the static ring and the dynamic ring, and ultimately failure of the sealing pair leads to failure of the sealing device product function. Moreover, the sealing device has no design for detecting the wear of the static and dynamic ring sealing pairs and the temperature of the sealing pairs, and is therefore unable to monitor the operating status of the sealing pairs in real time, and is unable to provide operating data support for fault prediction and life analysis of the sealing device. Summary of the invention

[0003] In view of the operating characteristics and usage requirements of ultra-large shaft diameter high linear speed sealing devices, the utility model proposes a high linear speed sealing device to meet the cooling requirements of high friction heat of the sealing surface of large shaft diameter high linear speed sealing devices, as well as the real-time monitoring data requirements of seal pair wear and seal pair temperature required for sealing device fault prediction and life analysis, thereby improving the performance and reliability of high linear speed sealing devices.

[0004] To achieve the above-mentioned purpose, the technical solution of the utility model is: a high linear speed sealing device, including a mounting seat body, a spring assembly, a dynamic ring, a stationary ring seat, a stationary ring, the stationary ring and the dynamic ring form a sealing pair, a sealing ring is arranged between the stationary ring seat and the stationary ring, and cooling water channels are respectively arranged on the mounting seat body and the stationary ring seat, the cooling water channel of the mounting seat body is connected to the cooling water channel on the stationary ring seat, and the cooling water channel on the stationary ring seat is connected to the working surfaces of the stationary ring and the dynamic ring sealing pair through the water channel of the stationary ring, so that the cooling water can directly reach the working surfaces of the stationary ring and the dynamic ring sealing pair and take away the friction heat of the sealing pair.

[0005] Furthermore, a displacement sensor and an infrared temperature sensor are provided on the stationary ring seat for detecting the wear amount of the sealing pair required for the pre-judgment of the sealing device failure and life analysis, and for the real-time monitoring of the temperature of the sealing pair.

[0006] Furthermore, a cooling water inlet channel a is provided in the mounting seat body. After the cooling water enters the channel a, it is divided into two paths. One path enters the inner cavity of the sealing device through the inclined channel b of the mounting seat body; the other path enters the stationary ring seat channel c through a pipe. The stationary ring seat, the sealing ring, the sealing belt, and the stationary ring form a closed annular cavity.

[0007] Furthermore, the cooling water in the stationary ring seat channel c enters the channel d on the stationary ring through this closed cavity, and finally enters the working surface of the sealing pair between the stationary ring and the rotating ring. It leaks and flows through the working surface of the sealing pair to the inside and outside of the sealing device, taking away the frictional heat of the sealing pair.

[0008] Furthermore, the sealing ring is in a dovetail shape and is embedded in the dovetail groove of the stationary ring seat.

[0009] Furthermore, a plurality of channels d are provided in the circumferential direction of the stationary ring to ensure that the cooling water enters the entire sealing pair between the stationary ring and the rotating ring.

[0010] Furthermore, a hose is provided between the cooling water channel a and the stationary ring seat channel c to adapt to the change in the distance between the stationary ring seat and the mounting seat body caused by the change in the compression amount of the spring assembly during the operation of the sealing device.

[0011] Furthermore, a filter is provided between the cooling water channel a and the stationary ring seat channel c to ensure the cleanliness of the cooling water entering the sealing pair between the stationary ring and the rotating ring, so as to avoid damaging the working surface of the sealing pair.

[0012] Furthermore, a flow switch is provided between the cooling water channel a and the stationary ring seat channel c.

[0013] Furthermore, one or more displacement sensors and infrared temperature sensors are arranged on the stationary ring seat. The infrared temperature sensors are circumferentially distributed on the stationary ring seat. Among them, the displacement sensor is used to measure the relative distance change between the stationary ring seat and the rotating ring to measure the wear amount of the sealing pair; the infrared temperature sensor is used to measure the temperature of the rotating ring at the sealing pair between the stationary ring and the rotating ring to determine the temperature of the working surface of the sealing pair.

[0014] The beneficial effects of the present utility model are:

[0015] For the high linear velocity sealing device of the present utility model, the cooling water circuit and the internal structure of the sealing device are designed. The cooling water reaches the working surface of the sealing pair between the stationary ring and the rotating ring and takes away the frictional heat of the sealing pair, meeting the cooling requirement of the high frictional heat of the sealing surface of the large shaft diameter and high linear velocity sealing device; displacement sensors and infrared temperature sensors are provided on the stationary ring seat, meeting the requirements for real-time monitoring data of the wear amount of the sealing pair and the temperature of the sealing pair required for the pre-judgment of the sealing device failure and life analysis. Brief Description of the Drawings

[0016] Figure 1 is a schematic structural diagram of the high-line-speed sealing device of the present utility model;

[0017] Figure 2 is Figure 1 the partial enlarged view at position I in Detailed Embodiment

[0018] The present utility model will be further described below in conjunction with the drawings and embodiments.

[0019] As Figure 1 、 Figure 2 shown, a high-line-speed sealing device provided by an embodiment of the present utility model is installed on the stern shaft 15, and includes a mounting seat body 1, a spring assembly 2, a hose 3, a filter 4, a hard pipe 5, a flow switch 6, a stationary ring seat 7, a sealing ring 8, a displacement sensor 9, a sealing strip 10, a stationary ring 11, a moving ring 12, a driving ring 13, an infrared temperature sensor 14, etc.

[0020] A cooling water inlet channel a is provided in the mounting seat body 1. After the cooling water enters the channel a, it is divided into two paths. One path enters the inner cavity of the sealing device through the inclined channel b of the mounting seat body 1; the other path enters the stationary ring seat channel c through the hose 3, the filter 4, and the hard pipe 5. The stationary ring seat 7, the sealing ring 8, the sealing strip 10, and the stationary ring 11 form a closed annular cavity. The cooling water in the channel c enters the channel d on the stationary ring through this closed cavity, and finally enters the working surface of the sealing pair between the stationary ring 11 and the moving ring 12, and leaks and flows to the inside and outside of the sealing pair through the working surface of the sealing pair, taking away the frictional heat of the sealing pair.

[0021] Among them, the sealing ring 8 is in a dovetail shape and is embedded in the dovetail groove of the stationary ring seat 7 to ensure that the sealing ring 8 does not fall off and effectively seals; a plurality of channels d are provided on the circumference of the stationary ring 11 to ensure that the cooling water effectively enters the entire sealing pair between the stationary ring 11 and the moving ring 12; a hose 3 is provided between the cooling water channel a and the channel c to adapt to the change in the distance between the stationary ring seat 7 and the mounting seat body 1 caused by the change in the compression amount of the spring assembly 2 during the operation of the sealing device; a filter 4 is provided between the cooling water channel a and the channel c to ensure the cleanliness of the cooling water entering the sealing pair between the stationary ring 11 and the moving ring 12 so as not to damage the working surface of the sealing pair; a flow switch 6 is provided between the cooling water channel a and the channel c, and an alarm is sent in time when the cooling water flow rate is lower than the set value for processing to ensure the flow rate of the cooling water entering the sealing pair between the stationary ring 11 and the moving ring 12.

[0022] As Figure 1 、 Figure 2As shown in the figure, a displacement sensor 9 and an infrared temperature sensor 14 are provided on the stationary ring seat 7. According to the design requirements of specific sealing devices, one or more displacement sensors 9 and infrared temperature sensors 14 can be arranged and circumferentially distributed on the stationary ring seat 7. The displacement sensor 9 is used to measure the change in the relative distance between the stationary ring seat 7 and the rotating ring 12, so as to measure the wear amount of the sealing pair. The infrared temperature sensor 14 is used to measure the temperature of the rotating ring at the sealing pair of the stationary ring 11 and the rotating ring 12, so as to determine the temperature of the working surface of the sealing pair.

Claims

1. A high-line-speed sealing device, characterized in that: It includes a mounting seat body, a spring assembly, a moving ring, a stationary ring seat, a stationary ring. The stationary ring and the moving ring form a sealing pair. A sealing ring is arranged between the stationary ring seat and the stationary ring. Cooling water channels are respectively provided on the mounting seat body and the stationary ring seat. The cooling water channel on the mounting seat body is communicated with the cooling water channel on the stationary ring seat. The cooling water channel on the stationary ring seat is communicated with the working surface of the sealing pair between the stationary ring and the moving ring through the water channel of the stationary ring, so that the cooling water can directly reach the working surface of the sealing pair between the stationary ring and the moving ring and take away the frictional heat of the sealing pair.

2. The high-line speed sealing device according to claim 1, characterized in that: A displacement sensor and an infrared temperature sensor are provided on the stationary ring seat, which are used for detecting the wear amount of the sealing pair required for the pre-judgment of the failure of the sealing device and the life analysis, and for the real-time monitoring of the temperature of the sealing pair.

3. The high-line-speed sealing device according to claim 1, characterized in that: A cooling water inlet channel a is provided in the mounting seat body. After the cooling water enters the channel a, it is divided into two paths. One path enters the inner cavity of the sealing device through the inclined channel b of the mounting seat body; the other path enters the channel c of the stationary ring seat through a pipe. The stationary ring seat, the sealing ring, the sealing belt and the stationary ring form a closed annular cavity.

4. The high-line-speed sealing device according to claim 3, wherein: The cooling water in the channel c of the stationary ring seat enters the channel d on the stationary ring through this closed cavity, and finally enters the working surface of the sealing pair between the stationary ring and the moving ring, and leaks and flows to the inside and outside of the sealing device through the working surface of the sealing pair, taking away the frictional heat of the sealing pair.

5. The high-line-speed sealing device according to claim 3, wherein: A plurality of channels d are provided on the circumference of the stationary ring to ensure that the cooling water enters the entire sealing pair between the stationary ring and the moving ring.

6. The high linear velocity sealing device according to claim 3, wherein: A hose is provided between the cooling water channel a and the channel c of the stationary ring seat to adapt to the change in the distance between the stationary ring seat and the mounting seat body caused by the change in the compression amount of the spring assembly during the operation of the sealing device.

7. The high-line-speed sealing device according to claim 3, wherein: A filter is provided between the cooling water channel a and the channel c of the stationary ring seat to ensure the cleanliness of the cooling water entering the sealing pair between the stationary ring and the moving ring so as not to damage the working surface of the sealing pair.

8. The high-line-speed sealing device according to claim 3, wherein: A flow switch is provided between the cooling water channel a and the channel c of the stationary ring seat.

9. The high linear velocity sealing device according to claim 1, characterized in that: The sealing ring is in a dovetail shape and is embedded in the dovetail groove of the stationary ring seat.

10. The high-line-speed sealing device according to claim 1, characterized in that: One or more displacement sensors and infrared temperature sensors are arranged on the stationary ring seat. The infrared temperature sensors are circumferentially distributed on the stationary ring seat. Among them, the displacement sensor is used to measure the relative distance change between the stationary ring seat and the moving ring to measure the wear amount of the sealing pair; the infrared temperature sensor is used to measure the temperature of the moving ring at the sealing pair between the stationary ring and the moving ring to measure the temperature of the working surface of the sealing pair.

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