A liquid-cooled mechanical seal

Abstract

This disclosure proposes a liquid-cooled mechanical seal, including a rotating ring, a stationary ring, and a bushing. The bushing has a rotating ring on one side and an anti-rotation structure to form the rotating ring portion. The bushing is fitted onto a stationary ring seat and a stationary ring from the other side, forming a sealing end face at the point where the rotating and stationary rings abut against each other. An annular flow channel is formed between the rotating and stationary rings on the inner circumferential side of the sealing end face, connecting to the outer circumferential wall of the bushing. The space between the inner circumferential wall of the stationary ring seat, the inner circumferential wall of the stationary ring, and the outer circumferential wall of the bushing serves as a transition flow channel. The stationary ring seat has an inlet and an outlet at the transition flow channel, and a sealing ring is also provided at the space. The transition flow channel is located at one end of the annular flow channel and communicates with it. Coolant enters the transition flow channel from the inlet, and the transition flow channel connects to the annular flow channel to allow coolant to enter the annular flow channel. The coolant entering the annular flow channel is used to cool the rotating ring, the stationary ring, and the abutting joint. The outlet is used for coolant outflow. This liquid-cooled mechanical seal is easy to assemble and facilitates the formation of a liquid-cooled flow channel.

Description

Technical Field

[0001] This utility model relates to the technical field of mechanical sealing devices, specifically a liquid-cooled mechanical seal. Background Technology

[0002] Mechanical seals construct a sealing structure through the sealing surfaces formed by the stationary ring and the rotating ring. Therefore, there is a certain problem of frictional heat generation. When solving the heat dissipation problem, one can consider carrying away the heat through the sealed medium. However, this cooling efficiency is low. To improve the cooling efficiency, liquid cooling can be considered. However, how to design a liquid cooling structure has become a challenge.

[0003] In the prior art, for example, a mechanical seal disclosed in patent application CN102472393B discloses a liquid-cooling structure, but the structure is relatively complex. Similarly, a mechanical seal disclosed in patent application CN108692029B also discloses a liquid-cooling structure, but this structure is also relatively complex. Likewise, a mechanical seal disclosed in patent application CN110088515B also discloses a liquid-cooling structure, but this structure is also relatively complex. Furthermore, a high-efficiency circulating cooling device for mechanical seals disclosed in patent application CN109058465B also discloses a liquid-cooling structure, but this structure is relatively complex. As can be seen from the above, although the cooling structure ensures the proper functioning of the mechanical seal, it presents certain challenges.

[0004] Therefore, the applicant proposes a liquid-cooled mechanical seal that is easy to assemble and facilitates the formation of a liquid-cooled flow channel. Summary of the Invention

[0005] The technical problem to be solved by this utility model is to overcome the defects of the prior art and propose a liquid-cooled mechanical seal that is easy to assemble and convenient to form a liquid-cooled flow channel.

[0006] Compared to existing technologies, this utility model proposes a liquid-cooled mechanical seal, including a rotating ring and a stationary ring, and a bushing for mounting and fixing on a rotating shaft. The bushing has a rotating ring on one side and an anti-rotation structure to form the rotating ring portion. The bushing is fitted onto the stationary ring seat and stationary ring from the other side. After the stationary ring is fitted, the mating area between the rotating and stationary rings forms a sealing end face. An annular flow channel connecting the rotating and stationary rings to the outer circumference of the bushing is formed on the inner circumference of the sealing end face. After the stationary ring seat is fitted onto the bushing from the other side, the inner circumference of the stationary ring seat... The gap between the inner wall of the stationary ring and the outer wall of the bushing serves as a transition channel. The stationary ring seat has an inlet and an outlet at the transition channel. A sealing ring is also provided at the gap to seal the end of the transition channel away from the annular channel. The transition channel is located at one end of the annular channel and is connected to the annular channel. Coolant enters the transition channel from the inlet. The transition channel is connected to the annular channel so that coolant enters the annular channel. The coolant entering the annular channel is used to cool the moving ring, the stationary ring and the mating parts. The outlet is used for coolant to flow out.

[0007] In some embodiments, a rotating ring seat is integrally provided on one side of the bushing, and the rotating ring seat is fitted with a rotating ring to form a rotating ring portion.

[0008] In some embodiments, the bushing has a transverse portion on one side as a moving ring seat, the moving ring seat has an annular groove surrounding the bushing, and the moving ring is sleeved on the other side of the bushing and engages with the annular groove.

[0009] In some embodiments, the stationary ring seat has a first sleeve hole on the side near the rotating ring, and the stationary ring is inserted into the first sleeve hole for engagement.

[0010] In some embodiments, the rotating ring portion serves as a base and as a first component, while the stationary ring is inserted into and sleeved with the first socket as a second component. The second component is fitted along the axial direction of the bushing from the other side of the bushing so that the rotating ring and the stationary ring abut against each other to form a sealing end face. An annular flow channel communicating with the outer peripheral wall of the bushing is formed between the rotating ring and the stationary ring on the inner circumferential side of the sealing end face.

[0011] In some embodiments, the stationary ring seat has an inner circumferential ring portion that serves as the bottom of the first socket hole. The inner circumferential ring portion has an elastic member on one side of the stationary ring, which is used to elastically press the stationary ring against the rotating ring to form a sealing end face.

[0012] In some embodiments, the outer peripheral wall of the rotating ring portion and the inner peripheral wall of the portion of the stationary ring seat on one side of the bushing are sleeved to form a communicating flow channel, which communicates the medium. The stationary ring may or may not have a force-bearing back side. When a force-bearing back side is provided, the communicating flow channel extends to the force-bearing back side towards the stationary ring side, and the medium applies pressure to the stationary ring and the rotating ring through the force-bearing back side to abut against each other.

[0013] In some embodiments, the stationary ring seat has a second socket at one end away from the rotating ring portion, and the sealing ring is inserted into and sleeved with the second socket.

[0014] In some embodiments, the stationary ring seat is provided with a first groove on the outside of the second socket, and a first retaining ring is installed in the first groove. The first retaining ring is used to axially limit the sealing ring in the second socket.

[0015] In some embodiments, the bushing has a second groove on the outside of the sealing ring, the second groove is used to install a second retaining ring, and the second retaining ring achieves axial limiting of the stationary ring seat by indirectly acting on the sealing ring for axial limiting.

[0016] Compared with the prior art, the present invention has the following advantages after adopting the above structure:

[0017] This disclosure improves upon the previous method by constructing a liquid cooling channel consisting of an inlet, an outlet, a transition channel, and an annular channel. The liquid cooling channel is formed through axial assembly, which not only facilitates assembly but also makes it easy to form the liquid cooling channel. Attached Figure Description

[0018] Figure 1 This is a three-dimensional schematic diagram of a liquid-cooled mechanical seal disclosed herein.

[0019] Figure 2 This is a left view of a liquid-cooled mechanical seal disclosed herein.

[0020] Figure 3 This is a sectional view along axis AA.

[0021] Figure 4 This is a three-dimensional schematic diagram of a liquid-cooled mechanical seal after the stationary ring seat has been removed.

[0022] Figure 5 for Figure 4 A three-dimensional schematic diagram further omitting the elastic element, anti-rotation pin, sealing ring, first retaining ring, and second retaining ring.

[0023] Figure 6 for Figure 5 A three-dimensional schematic diagram further removing the moving ring is provided.

[0024] Figure 7 for Figure 6 A three-dimensional schematic diagram further removing the stationary ring is provided.

[0025] Figure 8 This is a three-dimensional schematic diagram of a stationary ring seat disclosed herein, viewed from the side of the first socket.

[0026] Figure 9 This is a three-dimensional schematic diagram of a stationary ring seat disclosed herein, viewed from one side of the second socket.

[0027] Figure 10 This is a three-dimensional schematic diagram of a stationary ring as viewed from the side facing the moving ring.

[0028] Figure 11 This is a three-dimensional schematic diagram of a moving ring as viewed from the side away from the stationary ring.

[0029] Figure 12 This is a three-dimensional schematic diagram of a rotating ring in which the groove and the pin are in a mating state.

[0030] Figure 13 This is a three-dimensional schematic diagram of a bushing disclosed herein.

[0031] Explanation of reference numerals in the attached drawings: 1-Dynamic ring, 2-Static ring, 3-Sleeve, 4-Dynamic ring portion, 5-Static ring seat, 6-Sealing end face, 7-Annular flow channel, 8-Transition flow channel, 9-Inlet, 10-Outlet, 11-Sealing ring, 12-Dynamic ring seat, 13-Annular groove, 14-First socket hole, 15-Inner circumferential ring, 16-Elastic element, 17-Connecting flow channel, 18-Force-bearing back side, 19-Second socket hole, 20-First retaining groove, 21-First retaining ring, 22-Second retaining groove, 23-Second retaining ring, 24-Anti-rotation pin, 25-First sealing ring, 26-Second sealing ring, 27-Third sealing ring, 28-First conical inner wall, 29-Second conical inner wall, 30-Groove, 31-Pin, 32-Insertion hole. Detailed Implementation

[0032] The following description is intended to disclose the present invention so that those skilled in the art can implement it. The embodiments described below are merely examples, and other obvious variations will arise for those skilled in the art. The basic principles of the present invention defined in the following description can be applied to other embodiments, modifications, improvements, equivalents, and other technical solutions that do not depart from the spirit and scope of the present invention.

[0033] Those skilled in the art should understand that, in the disclosure of this utility model, the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model 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, the above terms should not be construed as limitations on this utility model.

[0034] like Figures 1 to 10The image shows a liquid-cooled mechanical seal, which can be used for sealing the shaft of a pump used to pump media. The basic structure of this liquid-cooled mechanical seal includes a rotating ring 1, a stationary ring 2, and a bushing 3 for mounting and fixing on the rotating shaft. The bushing 3 has the rotating ring 1 on one side and an anti-rotation structure to form a rotating ring portion 4. The bushing 3 is fitted onto the stationary ring seat 5 and the stationary ring 2 from the other side. After the stationary ring 2 is fitted, the contact point between the rotating ring 1 and the stationary ring 2 forms a sealing end face 6. An annular flow channel 7 connecting the rotating ring 1 and the stationary ring 2 to the outer circumference of the sealing end face 6 is formed between the rotating ring 1 and the stationary ring 2. After the stationary ring seat 5 is fitted onto the bushing 3 from the other side, the inner circumference of the stationary ring seat 5, the inner circumference of the stationary ring 2, and the bushing... The gap between the outer peripheral walls serves as a transition channel 8. The stationary ring seat 5 has an inlet 9 and an outlet 10 at the transition channel 8. A sealing ring 11 is also provided at the gap to seal the end of the transition channel 8 away from the annular channel 7. The transition channel 8 is located at one end of the annular channel 7 and communicates with it. Coolant enters the transition channel 8 through the inlet 9. The transition channel 8 connects to the annular channel 7 to allow coolant to enter the annular channel 7. The coolant entering the annular channel 7 is used to cool the moving ring 1, the stationary ring 2, and the aforementioned mating joints. The outlet 10 is used for coolant outflow. (See reference...) Figure 3 , Figure 3 The arrows in the diagram indicate the approximate flow of the coolant.

[0035] In some embodiments, such as Figure 11 , 12 As shown in Figure 13, Figure 11 This is a three-dimensional schematic diagram of a rotating ring 1 from the perspective of the side facing away from the stationary ring. The rotating ring 1 has a groove 30 on its end face facing away from the stationary ring. The groove 30 is radially open and extends axially. Figure 13 As shown, the bushing 3 has a insertion hole 32 at the bottom. During assembly, the pin 31 can be inserted into the insertion hole 32 first, so that the pin 31 is well fixed. Then, the moving ring 1 is sleeved onto the bushing 3 along the axial direction. When the end face of the moving ring 1 away from the stationary ring reaches the bottom of the bushing 3, the moving ring 1 is rotated to adjust the pin 31 so that it can be smoothly inserted into the groove 30, thereby completing the assembly. Therefore, the groove 30, the pin 31, and the insertion hole 32 constitute the anti-rotation structure and are easy to assemble.

[0036] In particular, the groove 30 is provided with a radial opening and extends axially. In this way, when the bushing 3 is provided with an annular groove 13 to accommodate the moving ring 1, the pin 31 can be inserted into the groove 30 more conveniently and smoothly without the need for assembly personnel to observe carefully, thus facilitating assembly.

[0037] The anti-rotation structure described above is simple and easy to assemble, but it is not limited to this type of anti-rotation structure. Any other anti-rotation structure applicable to this disclosure can also be applied to this disclosure.

[0038] In some embodiments, such as Figure 3 , 6 As shown in Figure 10, recesses are provided on the opposing end faces of the rotating ring 1 and the stationary ring 2. When the rotating ring 1 and the stationary ring 2 abut against each other to form a sealing end face 6, the two recesses combine to form an annular flow channel 7. The two recesses are as follows: the rotating ring 1 has a first recess on the inner side of the sealing end face 6, which in this example is a first conical inner wall 28; the stationary ring 2 has a second recess on the inner side of the sealing end face 6, which in this example is a second conical inner wall 29. Thus, as shown in Figure 10, the rotating ring 1 has a first recess on the inner side of the sealing end face 6, which in this example is a second conical inner wall 29. Figure 3 As shown, the first conical inner wall 28 and the second conical inner wall 29 are joined together to form an annular flow channel 7 with a V-shaped cross-section.

[0039] Of course, the specific shapes of the two concave parts can also be other shapes.

[0040] In some embodiments, such as Figure 3 , 6 As shown in Figure 8, the transition channel 8 adopts the simplest structural form, that is, the inner peripheral walls of the stationary ring seat 5 and the stationary ring 2, which are set as sleeves, are connected by sleeves to form an annular gap, which serves as the transition channel 8. In this way, it is not only convenient to process the stationary ring seat 5, the stationary ring 2, and the bushing 3, but also convenient to assemble. For example, the transition channel 8 is formed by sleeves of the first component and the second component described below.

[0041] Of course, the specific connectivity or shape of the interval can also be other structures, and any interval applicable to this disclosure can be adopted.

[0042] In some embodiments, such as Figure 3 , 6 As shown in Figure 7, an integrated design is implemented. Specifically, the bushing 3 has an integrally formed rotating ring seat 12 on one side, with a rotating ring 1 mounted on the rotating ring seat 12 to form the rotating ring portion 4. Thus, an integral rotating ring seat 12 is specially provided on one side of the bushing 3. For example, a high-precision bushing 3 and an integral rotating ring seat 12 can be obtained by machining castings or steel billets. Casting and machining are conventional processes and will not be elaborated upon. The bushing 3 is fitted onto the stationary ring seat 5 and stationary ring 2 from the other side, thereby assembling a liquid-cooled mechanical seal with a sealing end face 6. Compared to existing technologies, the machining and assembly precision is higher. When this disclosure is installed on the pump, the bushing 3 is fitted and sealed to the rotating shaft, and the stationary ring seat 5 is fixed to the pump body, greatly reducing the assembly difficulty for on-site operators and simplifying assembly. When the rotating shaft rotates, the shaft rotation drives the bushing 3 to rotate together, which in turn drives the rotating ring seat 12 and the rotating ring 1 to rotate relative to the stationary ring 2. In this example, a first sealing ring 25 is provided between the bushing 3 and the rotating shaft to achieve sealing.

[0043] In addition, due to its integrated design, leakage of the mechanical seal caused by pump vibration or poor machining accuracy of parts can be reduced.

[0044] Furthermore, such as Figure 3 , 6 As shown in Figure 7, the bushing 3 has a transverse portion on one side serving as a moving ring seat 12. The moving ring seat 12 has an annular groove 13 surrounding the bushing 3. The moving ring 1 is fitted onto the bushing 3 from the other side and engages with the annular groove 13. In this way, the moving ring 1 being fitted onto the bushing 3 from the other side and engaging with the annular groove 13 has the advantages of convenient assembly and high precision. The moving ring portion 4 formed on this basis of precision provides a reference for subsequent high-precision assembly.

[0045] For reliable connection, after the moving ring 1 is fitted onto the other side of the bushing 3 and inserted into the annular groove 13, it is also fixed with screws so that the moving ring 1 rotates together with the bushing 3 when it rotates.

[0046] like Figure 3 As shown, a second sealing ring 26 is provided between the annular groove 13 and the moving ring 1. Since the moving ring 1 and the annular groove 13 are inserted and sleeved together, there is an inner and outer circumference fit. Therefore, the second sealing ring 26 is preferably set to two or more, which helps to prevent the medium from entering the liquid cooling channel through the annular groove 13.

[0047] In some embodiments, such as Figure 3 , 8 As shown, the stationary ring seat 5 has a first socket 14 on the side near the moving ring 1, and the stationary ring 2 is inserted into the first socket 14 for engagement. This facilitates assembly and ensures high precision.

[0048] Furthermore, using the rotating ring portion 4 as a base and serving as the first component, the stationary ring 2 is inserted and fitted into the first socket 14 as the second component. The second component is fitted along the axial direction of the bushing 3 from the other side of the bushing 3 so that the rotating ring 1 and the stationary ring 2 abut against each other to form a sealing end face 6. An annular flow channel 7 connecting the rotating ring 1 and the stationary ring 2 to the outer peripheral wall of the bushing 3 is formed on the inner circumferential side of the sealing end face 6. In this way, the specific design involves assembling the first component and the second component separately, and then fitting the first component and the second component along the axial direction of the bushing 3 from the other side of the bushing 3, thereby simplifying the assembly.

[0049] In some embodiments, such as Figure 3 , 8 As shown, the stationary ring seat 5 has an inner circumferential ring portion 15 that serves as the bottom of the first socket 14. An elastic element 16 is provided on one side of the stationary ring 2. This elastic element 16 is used to elastically press the stationary ring 2 against the rotating ring 1 to form a sealing end face 6. This improves sealing.

[0050] like Figure 8 As shown, the inner circumferential ring 15 has a plurality of first blind holes arranged sequentially along the circumferential direction on the side near the moving ring 1, and an elastic element 16 is inserted into the first blind hole.

[0051] like Figure 4 , 8 As shown, for better reliability, an anti-rotation pin 24 is provided between the stationary ring 2 and the inner circumferential ring 15. The anti-rotation pin 24 is used to prevent the stationary ring 2 from rotating circumferentially. In this example, for ease of assembly, as shown... Figure 8 As shown, the anti-rotation pin 24 is inserted into the inner circumferential ring 15 on one side of the first socket 14. The stationary ring 2 is provided with a corresponding slot. When the stationary ring 2 is inserted and engaged with the first socket 14, the anti-rotation pin 24 is inserted and engaged in the slot.

[0052] In some embodiments, such as Figure 3 , 9 As shown, the stationary ring seat 5 has a second socket 19 at the end away from the rotating ring portion 4, and the sealing ring 11 is inserted into the second socket 19 for engagement. This facilitates assembly and allows for quick positioning of the sealing ring 11.

[0053] In some embodiments, such as Figure 3 , 8 As shown in Figures 1 and 9, the first socket 14 and the second socket 19 share the inner circumferential ring 15, forming a back-to-back structure. In other words, the inner circumferential ring 15 serves as the common bottom of the first socket 14 and the second socket 19. This helps to further simplify the structure and shorten the axial length of the stationary ring seat 5.

[0054] Furthermore, such as Figure 3 , 8 As shown in Figures 9 and 9, the inlet 9 and outlet 10 are radially arranged at the position of the inner circumferential ring 15. In this way, the inlet 9 and outlet 10 are respectively connected to the transition channel 8, while the arrangement of the first socket 14 and the second socket 19 is not affected.

[0055] In this example, as Figure 8 , 9 As shown, the inlet 9 and outlet 10 are arranged in a straight line along the radial direction at the position of the inner circumferential ring 15.

[0056] In some embodiments, such as Figure 3 , 4 As shown in Figure 9, the stationary ring seat 5 has a first retaining groove 20 on the outside of the second socket 19. The first retaining ring 21 is installed in the first retaining groove 20. The first retaining ring 21 is used to axially limit the sealing ring 11 in the second socket 19. In this way, the sealing ring 11 is prevented from escaping out of the second socket 19 in the opposite direction.

[0057] Furthermore, such as Figure 3 , 4 As shown in Figures 5 and 9, the bushing 3 has a second groove 22 on the outside of the sealing ring 11. The second groove 22 is used to install the second retaining ring 23. The second retaining ring 23 indirectly limits the axial positioning of the stationary ring seat 5 by acting on the sealing ring 11. In this way, the bushing 3, rotating ring 1, stationary ring 2, stationary ring seat 5, sealing ring 11, and second retaining ring 23 are assembled together axially to form a cartridge mechanical seal, thereby further reducing the assembly difficulty for on-site operators.

[0058] In some embodiments, such as Figure 1 , 3 As shown, the outer peripheral wall of the rotating ring portion 4 and the inner peripheral wall of the portion of the stationary ring seat 5 on one side of the bushing 3 are fitted together to form a connecting flow channel 17. This connecting flow channel 17 connects to the medium. The stationary ring 2 may or may not have a force-bearing back surface 18. When a force-bearing back surface 18 is provided, the connecting flow channel 17 extends towards the stationary ring 2 to the force-bearing back surface 18. The medium applies pressure to the stationary ring 2 through the force-bearing back surface 18, causing it to abut against the rotating ring 1. This results in better sealing performance of the sealing end face 6.

[0059] The force-bearing back surface 18 is, for example, a conical surface annularly arranged on the back surface of the stationary ring 2.

[0060] Regarding the formation of the connecting channel 7, it is worth noting that, as mentioned earlier, after the rotating ring 1 is installed on the rotating ring seat 12 of the bushing 3, the bushing 3 becomes the first component. The rotating ring portion 4 of the first component provides a reference, while the stationary ring 2 and the stationary ring seat 5 are connected as the second component. The second component is assembled using the first component as a reference. Therefore, as... Figure 1 , 3 As shown, the stationary ring seat 5 is fitted with the first component at one end of the moving ring seat 12 to form the connecting flow channel 7. In this way, on the one hand, a high-precision connecting flow channel 7 is formed very conveniently, and on the other hand, it provides great convenience for controlling the gap between the outer and inner peripheral walls of the connecting flow channel 7. That is, it can be achieved by fitting the first component and the second component together through the stationary ring seat 5, and by changing the moving ring 1 and stationary ring 2 of different diameters, connecting flow channels 7 of different sizes can be achieved.

[0061] Furthermore, such as Figure 3 As shown, a third sealing ring 27 is provided between the stationary ring 2 and the first socket 14, which helps to prevent the medium from entering the liquid cooling channel through the annular groove 13.

[0062] This disclosure also has an additional advantage: when the connecting flow channel 7 is provided, if there is a problem with the sealing end face 6, the medium can enter the liquid cooling flow channel through the sealing end face 6, and the leaked medium can be carried away by the coolant, thereby avoiding the mixing of coolant into the medium and ensuring the pumping quality of the medium.

[0063] When understanding this disclosure, the above structure may be referred to other embodiments / appendices if necessary. Figure 1 And that's understood, so I won't go into details here.

[0064] The above description is merely an illustrative embodiment of this utility model. Therefore, all equivalent changes or modifications made to the structure, features, and principles described in the scope of protection of this utility model are included within the scope of protection of this utility model.

Claims

1. A liquid-cooled mechanical seal, comprising a dynamic ring (1) and a stationary ring (2), characterized in that, It also includes a bushing (3) for mounting and fixing on a rotating shaft. The bushing (3) has a rotating ring (1) on one side and an anti-rotation structure to form a rotating ring portion (4). The bushing (3) is fitted into a stationary ring seat (5) and a stationary ring (2) from the other side. After the stationary ring (2) is fitted in, a sealing end face (6) is formed at the abutment of the rotating ring (1) and the stationary ring (2). A connecting bushing is formed between the rotating ring (1) and the stationary ring (2) on the inner circumference of the sealing end face (6). (3) The annular flow channel (7) on the outer peripheral wall, after the stationary ring seat (5) is installed from the other side of the bushing (3), the interval between the inner peripheral wall of the stationary ring seat (5), the inner peripheral wall of the stationary ring (2) and the outer peripheral wall of the bushing (3) serves as the transition flow channel (8). The stationary ring seat (5) is provided with an inlet (9) and an outlet (10) at the transition flow channel (8). A sealing ring (11) is also provided at the interval to seal the end of the transition flow channel (8) away from the annular flow channel (7). The transition channel (8) is located at one end of the annular channel (7) and is connected to the annular channel (7). Coolant enters the transition channel (8) from the inlet (9). The transition channel (8) is connected to the annular channel (7) so that coolant enters the annular channel (7). The coolant entering the annular channel (7) is used to cool the moving ring (1), the stationary ring (2) and the mating joint. The outlet (10) is used to allow coolant to flow out. The bushing (3) has a rotating ring seat (12) integrally provided on one side, and the rotating ring seat (12) is fitted with a rotating ring (1) to form a rotating ring part (4). The rotating ring (1) has a groove (30) on the end face away from the stationary ring. The groove (30) is radially open and extends axially. The bushing (3) has a insertion hole (32) at the bottom. During assembly, the pin (31) is first inserted into the insertion hole (32) so that the pin (31) is well fixed. Then the rotating ring (1) is sleeved with the bushing (3) axially. When the end face of the rotating ring (1) away from the stationary ring reaches the bottom of the bushing (3), the rotating ring (1) is rotated to adjust the pin (31) so that the pin (31) can be smoothly inserted into the groove (30), thereby completing the assembly and forming an anti-rotation structure.

2. The liquid-cooled mechanical seal as described in claim 1, characterized in that, The bushing (3) has a transverse portion on one side as a moving ring seat (12). The moving ring seat (12) has an annular groove (13) surrounding the bushing (3). The moving ring (1) is fitted into the bushing (3) from the other side and is inserted into the annular groove (13) for engagement.

3. The liquid-cooled mechanical seal as described in claim 1, characterized in that, The stationary ring seat (5) has a first socket (14) on the side near the moving ring (1), and the stationary ring (2) is inserted into the first socket (14) for engagement.

4. The liquid-cooled mechanical seal as described in claim 3, characterized in that, The rotating ring (4) serves as the base and is used as the first component. The stationary ring (2) is inserted into the first socket (14) and fitted as the second component. The second component is fitted along the axial direction of the bushing (3) from the other side of the bushing (3) so that the rotating ring (1) and the stationary ring (2) abut against each other to form a sealing end face (6). An annular flow channel (7) connecting the outer peripheral wall of the bushing (3) is formed between the rotating ring (1) and the stationary ring (2) on the inner circumferential side of the sealing end face (6).

5. The liquid-cooled mechanical seal as described in claim 4, characterized in that, The stationary ring seat (5) has an inner circumferential ring portion (15) that serves as the bottom of the first socket (14). The inner circumferential ring portion (15) has an elastic element (16) on one side of the stationary ring (2). The elastic element (16) is used to elastically press the stationary ring (2) against the moving ring (1) to form a sealing end face (6).

6. The liquid-cooled mechanical seal as described in claim 1, characterized in that, The outer peripheral wall of the moving ring part (4) and the inner peripheral wall of the part of the stationary ring seat (5) on one side of the bushing (3) are fitted together to form a connecting flow channel (17). The connecting flow channel (17) connects the medium. The stationary ring (2) is provided with a force-bearing back side (18) or not provided with a force-bearing back side (18). When a force-bearing back side (18) is provided, the connecting flow channel (17) extends to the force-bearing back side (18) on the side of the stationary ring (2). The medium presses the stationary ring (2) against the moving ring (1) through the force-bearing back side (18).

7. The liquid-cooled mechanical seal as described in claim 1, 2, 3, 4, 5, or 6, characterized in that, The stationary ring seat (5) has a second socket (19) at the end away from the moving ring part (4), and the sealing ring (11) is inserted into the second socket (19) for engagement.

8. The liquid-cooled mechanical seal as described in claim 7, characterized in that, The stationary ring seat (5) has a first groove (20) on the outside of the second socket (19). The first groove (20) is used to install a first retaining ring (21), which is used to axially limit the sealing ring (11) in the second socket (19).

9. The liquid-cooled mechanical seal as described in claim 7, characterized in that, The bushing (3) has a second groove (22) on the outside of the sealing ring (11). The second groove (22) is used to install the second retaining ring (23). The second retaining ring (23) achieves axial limiting of the stationary ring seat (5) by indirectly acting on the sealing ring (11) for axial limiting.

Images