Fire pump shaft seal device

Abstract

The utility model relates to the technical field of fire-fighting accessories, in particular to a fire-fighting water pump shaft seal device which comprises a static seal ring and a movable seal ring which are used on a fire-fighting water pump rotating shaft, and the movable seal ring is provided with a pressure spring. The wear-resistant layer is arranged on the side, making contact with the movable sealing ring, of the static sealing ring, so that the wear resistance of the static sealing ring can be improved, and the service life of the static sealing ring is prolonged; the sealing inner rings which are arranged in the inner rings of the static sealing ring and the movable sealing ring and are sleeved with the rotating shaft of the fire pump enhance the sealing effect; the movable sealing ring comprises a sealing contact ring and a pressure applying ring, and the pressure applying spring is arranged between the sealing contact ring and the pressure applying ring, so that the movable sealing ring can be in tight contact with the static sealing ring, and the sealing performance is ensured; and fixing ring seats matched with the connecting ring grooves in size and clamped and matched with the connecting ring grooves are arranged at the two ends of the pressing spring, so that the pressing spring is mounted more stably, pressure can be continuously provided for the movable sealing ring, and the sealing reliability is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of fire-fighting accessories, in particular to a fire-fighting water pump shaft sealing device. Background Art

[0002] Fire pumps play a vital role in fire safety, and their reliable operation is key to ensuring the proper functioning of fire protection systems. The shaft seal, a crucial component of fire pumps, directly impacts the pump's sealing effectiveness and operational stability. With increasing fire safety requirements, research and improvement in fire pump shaft seal technology are becoming increasingly important. Over extended operation, friction between the shaft seal and the rotating shaft can easily cause wear on the seal components, reducing sealing effectiveness and shortening the seal's service life. Existing shaft seal pressure structures are also insufficiently stable and reliable. Utility Model Content

[0003] The purpose of the utility model is to provide a fire water pump shaft seal device to solve the problems of poor wear resistance and short service life of the existing shaft seals mentioned in the above background technology.

[0004] To achieve the above objectives, the present invention provides the following technical solutions:

[0005] A fire pump shaft sealing device, comprising a static sealing ring and a dynamic sealing ring for use on a rotating shaft of the fire pump, wherein the dynamic sealing ring is provided with a pressure spring;

[0006] The side of the static sealing ring in contact with the dynamic sealing ring is provided with a wear-resistant layer, and the inner rings of the static sealing ring and the dynamic sealing ring are provided with a sealing inner ring sleeved with the rotating shaft of the fire water pump;

[0007] The dynamic sealing ring includes a sealing contact ring in close contact with the static sealing ring and a pressure ring in contact with the water pump impeller. The pressure spring is arranged between the sealing contact ring and the pressure ring. A connecting ring groove is provided on the surface of the sealing contact ring, the pressure ring and the pressure spring on one side in contact with each other. Fixed ring seats that are adapted to the size of the connecting ring groove and are snap-fitted are provided at both ends of the pressure spring.

[0008] Preferably, the fixed ring seat is connected to the connecting ring grooves of the sealing contact ring and the pressure ring through at least two groups of fixing bolts.

[0009] Preferably, the wear-resistant layer has a thickness of 0.5-1.5 mm.

[0010] Preferably, the thickness of the sealing inner ring is 1-3 mm.

[0011] Preferably, a wear-resistant ring is provided on the side of the sealing contact ring that contacts the static sealing ring.

[0012] Preferably, the thickness of the wear-resistant ring is 1-3 mm.

[0013] Preferably, a gasket is provided on the side of the pressure ring in contact with the water pump impeller, and the gasket and the pressure ring are interference-connected through several groups of plug joints.

[0014] Compared with the existing technology, the beneficial effects of the present invention are:

[0015] 1. In the shaft seal device of the fire water pump, the static seal ring and the dynamic seal ring are provided, so that the fire water pump shaft can be effectively sealed during operation; among them, the wear-resistant layer provided on the side of the static seal ring in contact with the dynamic seal ring can improve the wear resistance of the static seal ring and extend its service life; and the sealing inner ring provided in the inner ring of the static seal ring and the dynamic seal ring and sleeved with the fire water pump shaft further enhances the sealing effect; the dynamic seal ring includes a sealing contact ring and a pressure ring, and the pressure spring is provided between the sealing contact ring and the pressure ring, so that the dynamic seal ring can be in close contact with the static seal ring to ensure the sealing performance; a connecting ring groove is provided on the surface of the side where the sealing contact ring and the pressure ring are in contact with the pressure spring, and fixed ring seats that are adapted to the size of the connecting ring groove and are snap-fitted at both ends of the pressure spring are provided. This connection method makes the installation of the pressure spring more stable, can continuously provide pressure for the dynamic seal ring, and ensures the reliability of the seal.

[0016] 2. In this fire pump shaft seal device, the fixed ring seat is connected to the connecting ring groove of the sealing contact ring and the pressure ring by at least two sets of fixing bolts, so that the two ends of the pressure spring can be firmly clamped and fixed in the connecting ring groove, ensuring the stability and durability of the spring, thereby improving the sealing effect and durability of the shaft seal device.

[0017] 3. In the fire pump shaft seal device, a gasket is provided on the side where the pressure ring contacts the water pump impeller. The gasket and the pressure ring are interference-fitted through several sets of plug-in joints, so that the gasket can be firmly fixed on the pressure ring, thereby enhancing the contact stability and sealing between the pressure ring and the water pump impeller, and further improving the overall performance of the shaft seal device. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they provide further detailed explanations, but do not constitute a limitation to the present invention.

[0019] Figure 1 This is a schematic diagram of the exploded structure of the utility model;

[0020] Figure 2 This is a schematic structural diagram of the dynamic sealing ring of the utility model;

[0021] Figure 3 This is a schematic diagram of the exploded structure of the pressure ring of the utility model;

[0022] 10. Static sealing ring; 11. Wear-resistant layer; 12. Sealing inner ring;

[0023] 20. Dynamic sealing ring; 21. Sealing contact ring; 22. Pressure ring; 23. Wear ring; 24. Gasket; 25. Connecting ring groove; 26. Plug connector;

[0024] 30. Pressure spring; 31. Fixed ring seat. DETAILED DESCRIPTION

[0025] The following will be combined with the embodiments of the present invention and the accompanying drawings to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0026] In the description of the present invention, it should be understood that the terms "center", "vertical", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do 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 should not be understood as a limitation on the present invention.

[0027] A fire pump shaft seal device, such as Figure 1-Figure 3As shown, it includes a static sealing ring 10 and a dynamic sealing ring 20 for the fire pump shaft, and the dynamic sealing ring 20 is provided with a pressure spring 30; a wear-resistant layer 11 is provided on the side of the static sealing ring 10 in contact with the dynamic sealing ring 20, and a sealing inner ring 12 is provided in the inner ring of the static sealing ring 10 and the dynamic sealing ring 20, which is sleeved with the fire pump shaft; the dynamic sealing ring 20 includes a sealing contact ring 21 in close contact with the static sealing ring 10 and a pressure ring 22 in contact with the water pump impeller, and the pressure spring 30 is arranged between the sealing contact ring 21 and the pressure ring 22, and a connecting ring groove 25 is provided on the surface of the side where the sealing contact ring 21 and the pressure ring 22 contact the pressure spring 30, and a fixing ring seat 31 is provided at both ends of the pressure spring 30 that is adapted to the size of the connecting ring groove 25 and is snap-fitted. By setting the static sealing ring 10 and the dynamic sealing ring 20, the fire pump shaft can be effectively sealed during operation; wherein, the static sealing ring 1 0 The wear-resistant layer 11 provided on the side in contact with the dynamic sealing ring 20 can improve the wear resistance of the static sealing ring 10 and extend its service life; the sealing inner ring 12 provided in the inner ring of the static sealing ring 10 and the dynamic sealing ring 20 and sleeved with the fire water pump shaft further enhances the sealing effect; the dynamic sealing ring 20 includes a sealing contact ring 21 and a pressure ring 22, and a pressure spring 30 is provided between the sealing contact ring 21 and the pressure ring 22. Such a structural design enables the dynamic sealing ring 20 to be in close contact with the static sealing ring 10 to ensure sealing performance; a connecting ring groove 25 is provided on the surface of the side in contact with the sealing contact ring 21 and the pressure ring 22 and the pressure spring 30, and a fixing ring seat 31 is provided at both ends of the pressure spring 30 that is adapted to the size of the connecting ring groove 25 and is snap-fitted. This connection method makes the installation of the pressure spring 30 more stable, can continuously provide pressure to the dynamic sealing ring 20, and ensures the reliability of the seal.

[0028] Furthermore, the fixed ring seat 31 is connected to the connecting ring groove 25 of the sealing contact ring 21 and the pressure ring 22 by at least two sets of fixing bolts, so that the two ends of the pressure spring 30 can be firmly clamped and fixed in the connecting ring groove 25, ensuring the stability and durability of the spring, thereby improving the sealing effect and durability of the shaft sealing device.

[0029] Specifically, the thickness of the wear-resistant layer 11 is 0.5-1.5 mm, so that the static sealing ring 10 can effectively resist wear when in long-term contact and friction with the dynamic sealing ring 20, thereby extending the service life of the shaft sealing device while maintaining good sealing performance. The thickness of the sealing inner ring 12 is 1-3 mm, ensuring a tight fit with the fire water pump shaft, improving the sealing effect, preventing leakage, and thus ensuring the normal operation of the water pump.

[0030] Among them, a wear-resistant ring 23 is provided on the side where the sealing contact ring 21 contacts the static sealing ring 10. The thickness of the wear-resistant ring 23 is 1-3 mm, which enhances the wear resistance between the sealing contact ring 21 and the static sealing ring 10, reduces friction loss, and improves the reliability and stability of the shaft sealing device.

[0031] In addition, a gasket 24 is provided on the side of the pressure ring 22 that contacts the water pump impeller. The gasket 24 and the pressure ring 22 are interference-fitted through several groups of plug-in joints 26, so that the gasket 24 can be firmly fixed on the pressure ring 22, thereby enhancing the contact stability and sealing between the pressure ring 22 and the water pump impeller, and further improving the overall performance of the shaft sealing device.

[0032] The working principle of the fire pump shaft seal device:

[0033] First, install the static sealing ring 10 at the appropriate position of the fire pump shaft, and the sealing inner ring 12 in the inner ring is tightly fitted on the shaft, ensuring that there is no gap between the sealing inner ring 12 and the shaft;

[0034] Next, install the dynamic seal ring 20; the dynamic seal ring 20 consists of a sealing contact ring 21 and a pressure ring 22. Slide the dynamic seal ring 20 onto the rotating shaft, with the sealing contact ring 21 facing the static seal ring 10. At this time, the pressure spring 30 located between the sealing contact ring 21 and the pressure ring 22 engages with the connecting ring grooves 25 on the sealing contact ring 21 and the pressure ring 22 through the fixing ring seats 31 at both ends, ensuring that the pressure spring 30 is securely installed.

[0035] When the fire water pump is working, the pressure spring 30 continuously applies pressure to the sealing contact ring 21, so that the sealing contact ring 21 is in close contact with the static sealing ring 10; the wear-resistant layer 11 on the static sealing ring 10 can withstand the friction of the sealing contact ring 21, ensuring a long-term sealing effect; at the same time, the pressure ring 22 is in contact with the water pump impeller, ensuring that the entire dynamic sealing ring 20 maintains a stable position and pressure during operation.

[0036] The above shows and describes the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely preferred examples of the present invention and are not intended to limit the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention, and such changes and improvements fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A fire pump shaft seal device, comprising a static seal ring (10) and a dynamic seal ring (20) for use on a rotating shaft of a fire pump, characterized in that: The dynamic sealing ring (20) is provided with a pressure spring (30); A wear-resistant layer (11) is provided on the side of the static sealing ring (10) in contact with the dynamic sealing ring (20), and a sealing inner ring (12) sleeved with the rotating shaft of the fire water pump is provided in the inner rings of the static sealing ring (10) and the dynamic sealing ring (20); The dynamic sealing ring (20) includes a sealing contact ring (21) in close contact with the static sealing ring (10) and a pressure ring (22) in contact with the water pump impeller. The pressure spring (30) is arranged between the sealing contact ring (21) and the pressure ring (22). A connecting ring groove (25) is provided on the surface of the side where the sealing contact ring (21), the pressure ring (22) and the pressure spring (30) are in contact. Fixed ring seats (31) that are adapted to the size of the connecting ring groove (25) and are snap-fitted are provided at both ends of the pressure spring (30).

2. The fire pump shaft seal device according to claim 1, characterized in that: The fixed ring seat (31) is connected to the connecting ring grooves (25) of the sealing contact ring (21) and the pressure ring (22) through at least two groups of fixing bolts.

3. The fire pump shaft seal device according to claim 1, characterized in that: The thickness of the wear-resistant layer (11) is 0.5-1.5 mm.

4. The fire pump shaft seal device according to claim 1, characterized in that: The thickness of the sealing inner ring (12) is 1-3 mm.

5. The fire pump shaft seal device according to claim 1, characterized in that: A wear-resistant ring (23) is provided on the side of the sealing contact ring (21) that contacts the static sealing ring (10).

6. The fire pump shaft seal device according to claim 5, characterized in that: The thickness of the wear-resistant ring (23) is 1-3 mm.

7. The fire pump shaft seal device according to claim 1, characterized in that: A gasket (24) is provided on the side of the pressure ring (22) that contacts the water pump impeller, and the gasket (24) and the pressure ring (22) are interference-connected via a plurality of groups of plug connectors (26).

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