Mechanical sealing device of hot water pump

Abstract

The utility model discloses a mechanical sealing device of a hot water pump, and relates to the technical field of mechanical sealing. The sealing device comprises a driving device, wherein a buffering mechanism, a sealing mechanism and a fixing mechanism are arranged on the driving device; the buffering mechanism comprises a buffering assembly, the buffering assembly comprises a rotating shaft fixedly connected to the driving device, the rotating shaft is fixedly connected with a shaft sleeve, the shaft sleeve is fixedly connected with a connecting block, the connecting block is provided with a first fixing groove, the shaft sleeve is slidably connected with a movable ring, the movable ring is provided with a second fixing groove, and the second fixing groove is fixedly connected with a first spring. Through the buffering mechanism, under the high-temperature environment that the hot water pump conveys hot water, the change of the movable ring is buffered through the elastic effect of the first spring and the gap between the first limiting block and the second limiting block, and meanwhile vibration possibly generated by rotation of the rotating shaft can be buffered; the influence of special conditions on the sealing effect of the moving ring in contact with the static ring is reduced to a certain extent, and practicability is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of mechanical seals, and particularly relates to a mechanical seal device for a hot water pump. Background Art

[0002] In the prior art, through retrieval, it is found that the Chinese patent discloses a "novel mechanical seal device for a hot water pump", and its publication number is "CN216666012U". This patent mainly benefits from having a seal seat and a stationary ring. The left upper end inside the seal seat is slidably connected with a connecting rod, so that the seal seat is stably installed through the connecting rod and a spring. The right inner end of the seal seat is inlaid with a gasket, so that the seal seat and the gasket increase the sealing performance, thereby facilitating the improvement of the sealing effect of the sealing device; there are a positioning block and a fixing ring. The positioning block is installed inside the upper end of the fixing ring through a second internal hexagonal socket head screw, so that the positioning block is installed on the shaft sleeve through the fixing ring. The right lower end of the positioning block is snap-connected to the left end of the seal seat, so that the positioning block and the second O-ring limit the position of the seal seat on the shaft sleeve, thereby facilitating the installation of the seal seat on the shaft sleeve.

[0003] However, since the water transported by the hot water pump is hot water, it may have certain effects such as thermal expansion on the operation and contact of the dynamic and static rings in a high-temperature environment. Therefore, it is necessary to apply a buffering effect to reduce the influence. The buffering effect of this device on the dynamic ring mostly relies on contacting the stationary ring and the spring thereon for buffering, and the buffering effect is relatively low. To a certain extent, it makes it difficult for the device to be in a high-temperature environment for a long time, affecting the sealing effect. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a mechanical seal device for a hot water pump. By setting a buffering mechanism, the change of the dynamic ring is buffered through the elastic action of the first spring and the gap between the first limiting block and the second limiting block, solving the problem that the operation and contact of the dynamic and static rings may have certain thermal expansion in a high-temperature environment, making it difficult for the device to be in a high-temperature environment for a long time and affecting the sealing effect.

[0005] To solve the above technical problems, the utility model is realized through the following technical solutions:

[0006] The utility model is a mechanical seal device for a hot water pump, including a driving device, and a buffering mechanism, a sealing mechanism and a fixing mechanism are arranged on the driving device;

[0007] The buffer mechanism includes a buffer component, a limit component, and a moving ring component. The buffer component includes a rotating shaft fixedly connected to the output end of the driving device. An outer sleeve is fixedly connected to the outer wall of the rotating shaft. A connecting block is fixedly connected to the outer wall of the outer sleeve. A first fixing groove is formed in the bottom surface of the connecting block. A moving ring is slidably connected to the outer wall of the outer sleeve. A second fixing groove is formed in the top surface of the moving ring. A first spring is fixedly connected to the inner wall of the second fixing groove. The top end of the first spring is fixedly connected to the inner wall of the first fixing groove.

[0008] Further, the limit component includes a plurality of first limit blocks fixedly connected to the outer wall of the connecting block. A plurality of second limit blocks are fixedly connected to the outer wall of the moving ring. The outer walls of the plurality of first limit blocks are all slidably connected to the outer walls of the second limit blocks.

[0009] Further, the moving ring component includes a groove formed in the bottom surface of the moving ring. A moving ring sealing ring is fixedly connected to the inner wall of the groove. A receiving ring is fixedly connected to the top surface of the connecting block.

[0010] Further, the sealing mechanism includes a fixing component, a spring component, and a sealing component. The fixing component includes a fixing ring rotatably connected to the outer wall of the outer sleeve. The bottom surface of the fixing ring is fixedly connected to the top surface of the driving device. A gland is fixedly connected to the top surface of the fixing ring. A clamping groove is formed in the outer wall of the outer sleeve. A clamping ring is rotatably connected to the inner wall of the clamping groove. The outer wall of the clamping ring is rotatably connected to the inner wall of the fixing ring.

[0011] Further, the spring component includes a plurality of first spring grooves formed in the inner wall of the gland. A stationary ring is slidably connected to the inner wall of the gland. A plurality of second spring grooves are formed in the bottom surface of the stationary ring. A second spring is fixedly connected to the inner wall of each of the plurality of second spring grooves. The bottom ends of the plurality of second springs are all fixedly connected to the inner wall of the first spring grooves.

[0012] Further, an arc-shaped step surface is formed in the outer wall of the outer sleeve. A stationary ring sealing ring is rotatably connected to the inner wall of the arc-shaped step surface. The outer wall of the stationary ring sealing ring is fixedly connected to the inner wall of the stationary ring. A liquid film is provided on one side where the stationary ring and the moving ring are close to each other.

[0013] Further, the fixing mechanism includes a plurality of fixing holes formed in the bottom surface of the fixing ring. A shaft sleeve sealing ring is fixedly connected to the inner wall of the shaft sleeve. The inner wall of the shaft sleeve sealing ring is fixedly connected to the outer wall of the rotating shaft.

[0014] The utility model has the following beneficial effects:

[0015] 1. By setting up a buffer mechanism, even in the high-temperature environment where a hot water pump transports hot water, and even if the rotating shaft rotates and may be in a state of thermal expansion, the elastic action of the first spring and the gap between the first limit block and the second limit block play a buffering role in the changes of the moving ring. At the same time, the first spring can also buffer the vibration that may be generated by the rotation of the rotating shaft, reducing the influence of special situations on the sealing effect of the moving ring contacting the static ring to a certain extent and improving the practicability.

[0016] 2. By setting up a sealing mechanism, the fixing ring is fixed on the driving device. The second spring applies elastic force to drive the static ring to contact the moving ring, and together with the static ring seal ring and the moving ring seal ring, mechanical sealing is completed, avoiding hot water from contacting the rotating shaft and affecting the normal operation of the driving device to a certain extent and ensuring the sealing effect.

[0017] Of course, it is not necessary for any product implementing the present utility model to simultaneously achieve all the above-mentioned advantages. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0019] Figure 1 It is a schematic diagram of the overall structure of the present utility model;

[0020] Figure 2 It is a schematic top view structure diagram of the present utility model;

[0021] Figure 3 It is a schematic diagram of a partial exploded structure of the present utility model;

[0022] Figure 4 It is a schematic sectional structure diagram of the present utility model;

[0023] Figure 5 is Figure 4 An enlarged schematic diagram of part A in

[0024] In the drawings, the list of components represented by each reference numeral is as follows:

[0025] 1. Driving device; 2. Buffer mechanism; 3. Sealing mechanism; 4. Fixing mechanism; 21. Rotating shaft; 22. Bushing; 23. Connecting block; 24. First fixing groove; 25. Moving ring; 26. Second fixing groove; 27. First spring; 28. First limiting block; 29. ​​Second limiting block; 210. Groove; 211. Moving ring sealing ring; 212. Receiver ring; 31. Fixing ring; 32. Pressure cover; 33. Slot; 34. Retaining ring; 35. First spring groove; 36. Stationary ring; 37. Second spring groove; 38. Second spring; 39. Arc-shaped step surface; 310. Stationary ring sealing ring; 311. Liquid film; 41. Fixing hole; 42. Bushing sealing ring. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0027] See also Figures 1-5As shown in the figure, the utility model is a mechanical seal device for a hot water pump, which includes a driving device 1. A buffer mechanism 2, a sealing mechanism 3 and a fixing mechanism 4 are arranged on the driving device 1. The buffer mechanism 2 includes a buffer component, a limiting component and a moving ring component. The buffer component includes a rotating shaft 21 fixedly connected to the output end of the driving device 1. An outer sleeve 22 is fixedly connected to the outer wall of the rotating shaft 21. A connecting block 23 is fixedly connected to the outer wall of the outer sleeve 22. A first fixing groove 24 is opened on the bottom surface of the connecting block 23. A moving ring 25 is slidably connected to the outer wall of the outer sleeve 22. A second fixing groove 26 is opened on the top surface of the moving ring 25. A first spring 27 is fixedly connected to the inner wall of the second fixing groove 26. The top end of the first spring 27 is fixedly connected to the inner wall of the first fixing groove 24. The limiting component includes a plurality of first limiting blocks 28 fixedly connected to the outer wall of the connecting block 23. A plurality of second limiting blocks 29 are fixedly connected to the outer wall of the moving ring 25. The outer walls of the plurality of first limiting blocks 28 are all slidably connected to the outer walls of the second limiting blocks 29. The moving ring component includes a groove 210 opened on the bottom surface of the moving ring 25. A moving ring sealing ring 211 is fixedly connected to the inner wall of the groove 210. A receiving ring 212 is fixedly connected to the top surface of the connecting block 23. By setting the buffer mechanism 2, in the high-temperature environment of the hot water pump transporting hot water, even if the rotating shaft 21 rotates and may be in a state of thermal expansion, the elastic action of the first spring 27 and the gap between the first limiting block 28 and the second limiting block 29 play a buffering role in the change of the moving ring 25. At the same time, the first spring 27 can also buffer the vibration that may be generated by the rotation of the rotating shaft 21, reducing the influence of special situations on the sealing effect of the moving ring 25 contacting the stationary ring 36 to a certain extent and improving the practicability. The sealing mechanism 3 includes a fixing component, a spring component and a sealing component. The fixing component includes a fixing ring 31 rotatably connected to the outer wall of the outer sleeve 22. The bottom surface of the fixing ring 31 is fixedly connected to the top surface of the driving device 1. A gland 32 is fixedly connected to the top surface of the fixing ring 31. A clamping groove 33 is opened on the outer wall of the outer sleeve 22. A clamping ring 34 is rotatably connected to the inner wall of the clamping groove 33. The outer wall of the clamping ring 34 is rotatably connected to the inner wall of the fixing ring 31. The spring component includes a plurality of first spring grooves 35 opened on the inner wall of the gland 32. A stationary ring 36 is slidably connected to the inner wall of the gland 32. A plurality of second spring grooves 37 are opened on the bottom surface of the stationary ring 36. A plurality of second springs 38 are fixedly connected to the inner walls of the plurality of second spring grooves 37. The bottom ends of the plurality of second springs 38 are all fixedly connected to the inner walls of the first spring grooves 35. An arc-shaped step surface 39 is opened on the outer wall of the outer sleeve 22. A stationary ring sealing ring 310 is rotatably connected to the inner wall of the arc-shaped step surface 39. The outer wall of the stationary ring sealing ring 310 is fixedly connected to the inner wall of the stationary ring 36. A liquid film 311 is arranged on one side of the stationary ring 36 and the moving ring 25 close to each other. By setting the sealing mechanism 3, the fixing ring 31 is fixed on the driving device 1. The second spring 38 applies elastic force to drive the stationary ring 36 to contact the moving ring 25, and the mechanical seal is completed in cooperation with the stationary ring sealing ring 310 and the moving ring sealing ring 211.To a certain extent, it avoids the influence of hot water contacting the rotating shaft 21 on the normal operation of the driving device 1, ensuring the sealing effect. The fixing mechanism 4 includes a number of fixing holes 41 opened on the bottom surface of the fixing ring 31. An inner wall of the bushing 22 is fixedly connected with a bushing sealing ring 42, and an inner wall of the bushing sealing ring 42 is fixedly connected with an outer wall of the rotating shaft 21. By providing the fixing mechanism 4, the number of fixing holes 41 facilitates the fixing of the sealing mechanism 3 on the driving device 1 by personnel. The bushing sealing ring 42 is provided to strengthen the connection and fixing and sealing effect between the bushing 22 and the rotating shaft 21. Among them, the bushing sealing ring 42 has a certain interference amount, so that it takes a certain amount of effort to fit the bushing 22 onto the rotating shaft 21 with the aid of tools, strengthening the fixing and sealing effect.

[0028] A specific application of this embodiment is as follows: The main material of the liquid film 311 is grease. The working principle of grease is that the thickener holds the oil in the position where lubrication is required. When there is a load, the thickener releases the oil, thus playing a lubricating role. At normal temperature and in a static state, it is like a solid, capable of maintaining its shape without flowing, and can adhere to the metal without slipping. At high temperature or when subjected to an external force exceeding a certain limit, it is like a liquid and can flow. When grease is subjected to the shearing action of moving parts in a machine, it can flow and lubricate, reducing the friction and wear between the moving surfaces. When the shearing action stops, it can restore a certain consistency. This special fluidity of grease determines that it can be used for lubrication in parts where lubricating oil is not suitable. In addition, since it is a semi-solid substance, its sealing and protective effects are better than those of lubricating oil.

[0029] By setting the buffer mechanism 2, when the driving device 1 in the hot water pump is driven, it drives the rotation of the rotating shaft 21. Since the shaft sleeve 22 is fixedly connected to the rotating shaft 21, the shaft sleeve 22 rotates around the rotating shaft 21 to drive the connecting block 23 to rotate. The connecting block 23 drives a number of first limiting blocks 28 to rotate. The number of first limiting blocks 28 drives the moving ring 25 to rotate through the second limiting block 29. Under the lubrication of the liquid film 311, the moving ring 25 rotates to contact the static ring 36, and the sealing function is completed by cooperating with the moving ring seal ring 211 and the static ring seal ring 310. The groove 210 on the moving ring 25 is designed to facilitate the installation of the moving ring seal ring 211 and at the same time increase the interference fit between the moving ring 25 and the shaft sleeve 22, reducing the influence of the high-temperature environment on the moving ring 25. When installing the buffer mechanism 2 and the sealing mechanism 3, the operator presses down the receiving ring 212 to drive the connecting block 23 to compress the first spring 27 through the first fixing groove 24 and the second fixing groove 26. There is a certain gap between the first limiting block 28 and the second limiting block 29, and it is not completely pressed down and closed, giving the moving ring 25 and the first spring 27 a buffer space. While giving the buffer space, the first spring 27 continuously acts with elastic force to make the moving ring 25 contact the static ring 36 to complete the mechanical seal. It realizes that in the high-temperature environment of the hot water pump transporting hot water, even if the rotating shaft 21 rotates and may be in a thermal expansion state, through the elastic action of the first spring 27 and the gap between the first limiting block 28 and the second limiting block 29, it plays a buffering role in the change of the moving ring 25. At the same time, the first spring 27 can also buffer the vibration that may be generated by the rotation of the rotating shaft 21, reducing the influence of special situations on the sealing function of the moving ring 25 contacting the static ring 36 to a certain extent and improving the practicability.

[0030] By setting up the sealing mechanism 3, the staff first put the fixing ring 31 on the rotating shaft 21, fix the fixing ring 31 on the driving device 1 through a number of fixing holes 41, then put the static ring seal 310 and the dynamic ring seal 211 on the arc-shaped step surface 39, and put the snap ring 34 into the clamping groove 33 of the sleeve 22. After fixing the sleeve seal ring 42 on the inner wall of the sleeve 22, put the sleeve 22 on the rotating shaft 21 and fix the sleeve 22 on the rotating shaft 21. At this time, under the elastic action of the second spring 38, the static ring 36 is pushed to slide upward in the gland 32 to fix the static ring seal 310. At this time, the second spring 38 is in a compressed state. The second spring 38 and the first spring 27 cooperate with each other to make the static ring 36 contact the dynamic ring 25 in a sealed state. A liquid film 311 is coated on the contact surface between the dynamic ring 25 and the static ring 36 for lubrication. The clamping groove 33 and the snap ring 34 play a limiting role in connecting the fixing ring 31 and the sleeve 22. The snap ring 34 is made of rubber material and also plays a sealing role for the fixing ring 31 and the sleeve 22. The fixing ring 31 is fixed on the driving device 1. The second spring 38 applies elastic force to drive the static ring 36 to contact the dynamic ring 25, and cooperate with the static ring seal 310 and the dynamic ring seal 211 to complete mechanical sealing, which to a certain extent avoids hot water contacting the rotating shaft 21 and affecting the normal operation of the driving device 1, and ensures the sealing effect.

[0031] By setting up the fixing mechanism 4, a number of fixing holes 41 facilitate the staff to fix the sealing mechanism 3 on the driving device 1. The sleeve seal ring 42 is set to strengthen the connection and fixing and sealing effect between the sleeve 22 and the rotating shaft 21. The sleeve seal ring 42 has a certain interference fit, so it takes a certain amount of effort to put the sleeve 22 on the rotating shaft 21 with the aid of tools, which strengthens the fixing and sealing effect.

[0032] In the description of this specification, the descriptions referring to the terms "an embodiment", "example", "specific example", etc. mean that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0033] The preferred embodiments of the present utility model disclosed above are only used to help illustrate the present utility model. The preferred embodiments do not describe all the details in detail, nor do they limit the present utility model to the specific embodiments described. Obviously, many modifications and variations can be made according to the content of this specification. These embodiments are selected and specifically described in this specification in order to better explain the principle and practical application of the present utility model, so that those skilled in the relevant art can well understand and utilize the present utility model. The present utility model is only limited by the claims and their full scope and equivalents.

Claims

1. A mechanical seal device for a hot water pump, comprising a driving device (1), wherein a buffer mechanism (2), a sealing mechanism (3) and a fixing mechanism (4) are arranged on the driving device (1), and it is characterized in that: The buffer mechanism (2) includes a buffer component, a limiting component and a moving ring component. The buffer component includes a rotating shaft (21) fixedly connected to the output end of the driving device (1). An outer sleeve (22) is fixedly connected to the outer wall of the rotating shaft (21). A connecting block (23) is fixedly connected to the outer wall of the outer sleeve (22). A first fixing groove (24) is formed in the bottom surface of the connecting block (23). A moving ring (25) is slidably connected to the outer wall of the outer sleeve (22). A second fixing groove (26) is formed in the top surface of the moving ring (25). A first spring (27) is fixedly connected to the inner wall of the second fixing groove (26). The top end of the first spring (27) is fixedly connected to the inner wall of the first fixing groove (24).

2. The mechanical seal device of a hot water pump according to claim 1, characterized in that, The limiting component includes a plurality of first limiting blocks (28) fixedly connected to the outer wall of the connecting block (23). A plurality of second limiting blocks (29) are fixedly connected to the outer wall of the moving ring (25). The outer walls of the plurality of first limiting blocks (28) are all slidably connected to the outer walls of the second limiting blocks (29).

3. The mechanical seal device of a hot water pump according to claim 2, characterized in that, The moving ring component includes a groove (210) formed in the bottom surface of the moving ring (25). A moving ring sealing ring (211) is fixedly connected to the inner wall of the groove (210). A receiving ring (212) is fixedly connected to the top surface of the connecting block (23).

4. A mechanical seal device for a hot water pump according to claim 3, characterized in that, The sealing mechanism (3) includes a fixing component, a spring component and a sealing component. The fixing component includes a fixing ring (31) rotatably connected to the outer wall of the outer sleeve (22). The bottom surface of the fixing ring (31) is fixedly connected to the top surface of the driving device (1). A gland (32) is fixedly connected to the top surface of the fixing ring (31). A clamping groove (33) is formed in the outer wall of the outer sleeve (22). A clamping ring (34) is rotatably connected to the inner wall of the clamping groove (33). The outer wall of the clamping ring (34) is rotatably connected to the inner wall of the fixing ring (31).

5. A mechanical seal device for a hot water pump according to claim 4, characterized in that, The spring component includes a plurality of first spring grooves (35) formed in the inner wall of the gland (32). A stationary ring (36) is slidably connected to the inner wall of the gland (32). A plurality of second spring grooves (37) are formed in the bottom surface of the stationary ring (36). A plurality of second springs (38) are fixedly connected to the inner walls of the plurality of second spring grooves (37). The bottom ends of the plurality of second springs (38) are all fixedly connected to the inner walls of the first spring grooves (35).

6. The mechanical seal device of a hot water pump according to claim 5, characterized in that, An arc-shaped step surface (39) is formed in the outer wall of the outer sleeve (22). A stationary ring sealing ring (310) is rotatably connected to the inner wall of the arc-shaped step surface (39). The outer wall of the stationary ring sealing ring (310) is fixedly connected to the inner wall of the stationary ring (36). A liquid film (311) is arranged on one side where the stationary ring (36) and the moving ring (25) are close to each other.

7. A mechanical seal device for a hot water pump according to claim 6, characterized in that, The fixing mechanism (4) includes a plurality of fixing holes (41) formed in the bottom surface of the fixing ring (31). An inner wall of the bushing (22) is fixedly connected with a bushing sealing ring (42), and an inner wall of the bushing sealing ring (42) is fixedly connected with an outer wall of the rotating shaft (21).

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