Impact-resistant mechanical seal

Abstract

The impact-resistant mechanical seal comprises a sealing box body and a rotating shaft, a bearing sleeve is installed on the upper wall of the sealing box body in an inserted mode, a shaft sleeve is connected to the outer side of the rotating shaft in a sleeved mode, the shaft sleeve is installed in the bearing sleeve in an inserted mode, and a cooling water jacket is installed on the lower wall of the sealing box body. The cooling water jacket comprises a main lantern ring, an auxiliary lantern ring, a water inlet pipe, a water outlet, a first water storage cavity, a second water storage cavity and a connecting hole, a partition plate is installed in the second water storage cavity, and a through hole is formed in the side wall of the partition plate. Through the arrangement of the cooling water jacket, the overall temperature of the device can be reduced, so that the situation that the upper static ring, the lower static ring, the upper movable ring and the lower movable ring are accelerated to age or broken and damaged due to high temperature is avoided, the service life of the device is effectively prolonged, in addition, the flowing time of cooling water in the cooling water jacket is prolonged through the partition plates, and the service life is prolonged. And the cooling performance of the cooling water jacket is further improved.

Description

Technical Field

[0001] This patent relates to the technical field of mechanical seals, specifically impact-resistant mechanical seals. Background Art

[0002] Mechanical seal refers to a device that prevents fluid leakage by at least one pair of end faces perpendicular to the axis of rotation, which are kept in contact and slide relative to each other under the action of fluid pressure and the elastic force of the compensation mechanism and the cooperation of auxiliary seals;

[0003] The existing mechanical seal is an all-metal structure. In actual use, the mechanical equipment is in a stirring state with impact loads, which causes the mechanical seal to be in a high-temperature state. This can easily lead to cracking and damage of the dynamic and static rings of the seal under the action of impact loads and high temperatures, seriously affecting the sealing performance and resulting in a short service life of the equipment.

[0004] Patent content

[0005] The purpose of this patent is to provide an impact-resistant mechanical seal to solve the problems raised in the above background technology.

[0006] To achieve the above purpose, this patent provides the following technical solutions: an impact-resistant mechanical seal, comprising a sealing box and a rotating shaft, wherein a bearing sleeve is inserted and installed on the upper wall of the sealing box, a shaft sleeve is sleeved on the outer side of the rotating shaft, and the shaft sleeve is inserted and installed in the bearing sleeve;

[0007] A cooling water jacket is installed on the lower wall of the sealed box body, and the cooling water jacket includes a main sleeve, a secondary sleeve, a water inlet pipe, a water outlet, a first water storage chamber, a second water storage chamber and a connecting hole. The upper wall of the main sleeve is installed with a secondary sleeve, and the main sleeve and the secondary sleeve are both arranged on the outside of the shaft sleeve. The upper wall of the secondary sleeve is fitted and connected with the lower wall of the sealed box body. The inner cavity of the main sleeve is provided with a first water storage chamber, and the secondary sleeve is provided with a second water storage chamber. The upper wall of the main sleeve is provided with a connecting hole, and the connecting hole connects the first water storage chamber and the second water storage chamber to each other. The side wall of the secondary sleeve is inserted and installed with a water inlet pipe, and the water inlet pipe is connected to the second water storage chamber. The side wall of the main sleeve is provided with a water outlet, and the water outlet is connected to the first water storage chamber;

[0008] A partition is installed in the second water storage chamber, and a through hole is opened on the side wall of the partition. The partition divides the second water storage chamber into a serpentine water flow channel.

[0009] Preferably, the upper wall of the cooling water jacket and the lower wall of the sealing box are provided with a slot, and an upper static ring and a lower static ring are respectively inserted and installed in the two slots. A spring seat is sleeved on the outer side of the shaft sleeve, and an upper dynamic ring and a lower dynamic ring are respectively installed on the upper and lower sides of the spring seat. The upper dynamic ring and the lower dynamic ring can be fitted with the upper static ring and the lower static ring respectively.

[0010] Preferably, a bearing is installed on the upper wall of the sealing box body, and the bearing is arranged outside the bearing sleeve. A bearing cover is installed on the upper wall of the sealing box body, and the bearing cover is arranged above the bearing. A second bolt is screwed into the upper wall of the bearing cover, and the bearing cover is connected to the sealing box body through the second bolt.

[0011] Preferably, the partition includes a plate body, a fixing frame and an impeller. The plate body is inserted and installed in the second water storage chamber. The side wall of the plate body is installed with a fixing frame. The middle part of the fixing frame is rotatably installed with an impeller, and the impeller is set in the through hole.

[0012] Preferably, a fastening ring is sleeved on the outer side of the bearing sleeve, and threaded holes are provided on the side walls of the bearing sleeve and the shaft sleeve. The two threaded holes are in the same axis, and a first bolt is inserted into the side wall of the fastening ring and installed. The first bolt passes through the side wall of the fastening ring and is screwed into the threaded hole.

[0013] Preferably, a mounting hole is provided on the upper wall of the bearing cover, and a hanging ring is inserted into the mounting hole.

[0014] Compared with the prior art, the beneficial effects of this patent are:

[0015] This device is provided with a cooling water jacket below its sealed box. By injecting cooling water into the cooling water jacket, the overall temperature of the device can be reduced, thereby preventing the upper static ring, lower static ring, upper dynamic ring and lower dynamic ring from accelerated aging or cracking damage due to high temperature, effectively extending the service life of the device;

[0016] In addition, the device is also provided with a partition in the cooling water jacket. The provision of the partition increases the flow time of the cooling water in the cooling water jacket, further improving the cooling performance of the cooling water jacket. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the patent structure.

[0018] Figure 2 This is a side sectional view of this patent.

[0019] Figure 3 This is a schematic diagram of the partition structure of this patent.

[0020] In the figure: 1 sealing box, 2 rotating shaft, 3 bearing sleeve, 4 shaft sleeve, 5 cooling water jacket, 51 main sleeve ring, 52 auxiliary sleeve ring, 53 water inlet pipe, 54 water outlet, 55 first water storage chamber, 56 second water storage chamber, 57 connecting hole, 6 partition plate, 61 plate body, 62 fixing frame, 63 impeller, 7 through hole, 8 slot, 9 upper static ring, 10 lower static ring, 11 spring seat, 12 upper dynamic ring, 13 lower dynamic ring, 14 bearing, 15 bearing cover, 16 second bolt, 17 fastening ring, 18 threaded hole, 19 first bolt, 20 mounting hole, 21 lifting ring. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of this patent to clearly and completely describe the technical solutions in the embodiments of this patent. Obviously, the embodiments described are only part of the embodiments of this patent, not all of them. Based on the embodiments of this patent, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this patent.

[0022] See also Figure 1-3 This patent provides a technical solution: an impact-resistant mechanical seal, comprising a sealing box 1 and a rotating shaft 2, wherein a bearing sleeve 3 is inserted and installed on the upper wall of the sealing box 1, and a shaft sleeve 4 is sleeved on the outer side of the rotating shaft 2, and the shaft sleeve 4 is inserted and installed in the bearing sleeve 3;

[0023] The lower wall of the sealed box body 1 is provided with a cooling water jacket 5, which includes a main collar 51, a secondary collar 52, a water inlet pipe 53, a water outlet 54, a first water storage chamber 55, a second water storage chamber 56 and a connecting hole 57. The upper wall of the main collar 51 is provided with a secondary collar 52. Both the main collar 51 and the secondary collar 52 are arranged on the outside of the shaft sleeve 4. The upper wall of the secondary collar 52 is fitted with the lower wall of the sealed box body 1. The inner cavity of the main collar 51 is opened. A first water storage chamber 55 is provided, a second water storage chamber 56 is provided in the auxiliary collar 52, a connecting hole 57 is provided on the upper wall of the main collar 51, and the connecting hole 57 connects the first water storage chamber 55 and the second water storage chamber 56 to each other. A water inlet pipe 53 is inserted into the side wall of the auxiliary collar 52, and the water inlet pipe 53 is connected to the second water storage chamber 56. A water outlet 54 is provided on the side wall of the main collar 51, and the water outlet 54 is connected to the first water storage chamber 55;

[0024] When the rotating shaft 2 rotates, friction occurs in the dynamic and static rings used for sealing, namely the upper dynamic ring 12, the upper static ring 9, the lower dynamic ring 13, and the lower static ring 10, which easily generates high temperature, causing accelerated aging of the dynamic and static rings, thereby shortening the service life of the mechanical seal.

[0025] Therefore, the device is provided with a cooling water jacket 5 on the outside of its dynamic and static rings. By injecting cooling water into the cooling water jacket 5, the high temperature generated by friction is absorbed by the cooling water, thereby achieving the purpose of cooling the device, thereby slowing down the aging of the dynamic and static rings, avoiding leakage of the device, and effectively extending the service life of the device;

[0026] A partition 6 is installed in the second water storage chamber 56, and a through hole 7 is opened on the side wall of the partition 6. The partition 6 divides the second water storage chamber 56 into a serpentine water flow channel;

[0027] By arranging the partition 6 in the second water storage chamber 56 , the travel of the cooling water in the second water storage chamber 56 can be extended, and the passing time thereof can be prolonged, thereby further improving the temperature reduction performance of the cooling water jacket 5 .

[0028] Specifically, the upper wall of the cooling water jacket 5 and the lower wall of the sealing box 1 are both provided with a card slot 8, and the upper static ring 9 and the lower static ring 10 are inserted and installed in the two card slots 8 respectively. The outer side of the shaft sleeve 4 is sleeved with a spring seat 11, and the upper and lower sides of the spring seat 11 are respectively installed with an upper dynamic ring 12 and a lower dynamic ring 13. The upper dynamic ring 12 and the lower dynamic ring 13 can be respectively fitted with the upper static ring 9 and the lower static ring 10;

[0029] The upper dynamic ring 12 and the lower dynamic ring 13, the upper static ring 9 and the lower static ring 10 proposed herein are all made of impact-resistant hard alloy, and the alloy is tungsten carbide alloy, but is not limited to this alloy.

[0030] Specifically, a bearing 14 is installed on the upper wall of the sealing box 1, and the bearing 14 is arranged outside the bearing sleeve 3. A bearing cover 15 is installed on the upper wall of the sealing box 1, and the bearing cover 15 is arranged above the bearing 14. A second bolt 16 is screwed into the upper wall of the bearing cover 15, and the bearing cover 15 is connected to the sealing box 1 through the second bolt 16;

[0031] The bearing cover 15 can suppress the bearing 14 to prevent it from shifting and affecting the normal use of the device.

[0032] Specifically, the partition 6 includes a plate body 61, a fixing frame 62 and an impeller 63. The plate body 61 is inserted into the second water storage chamber 56. The fixing frame 62 is installed on the side wall of the plate body 61. The impeller 63 is rotatably installed in the middle of the fixing frame 62. The impeller 63 is set in the through hole 7.

[0033] The impeller 63 can increase the pressure of the cooling water.

[0034] Specifically, a fastening ring 17 is sleeved on the outer side of the bearing sleeve 3, and threaded holes 18 are provided on the side walls of the bearing sleeve 3 and the shaft sleeve 4. The two threaded holes 18 are on the same axis, and a first bolt 19 is inserted into the side wall of the fastening ring 17 and installed. The first bolt 19 passes through the side wall of the fastening ring 17 and is screwed into the threaded hole 18.

[0035] Specifically, a mounting hole 20 is formed on the upper wall of the bearing cover 15, and a lifting ring 21 is inserted into the mounting hole 20;

[0036] The device can be easily hoisted by the hoisting ring 21, which is convenient for disassembly or installation.

[0037] Working principle: When the device is working, a water pipe can be connected to the water inlet pipe 53 to inject cooling water into the cooling water jacket 5. The water will then flow out through the water outlet 54, allowing the cooling water to absorb the high temperature generated by friction, thereby achieving the purpose of cooling the device, thereby slowing down the aging of the dynamic and static rings, avoiding leakage of the device, and effectively extending the service life of the device.

[0038] It will be apparent to those skilled in the art that this patent is not limited to the details of the exemplary embodiments described above, and that this patent can be implemented in other specific forms without departing from the spirit or essential characteristics of this patent. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of this patent is defined by the appended claims rather than the foregoing description, and it is intended that all changes that fall within the meaning and range of equivalents of the claims be encompassed within this patent. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

[0039] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. An impact-resistant mechanical seal comprising a sealing housing (1) and a rotating shaft (2), characterized in that: A bearing sleeve (3) is inserted and installed on the upper wall of the sealing box (1), a shaft sleeve (4) is sleeved on the outer side of the rotating shaft (2), and the shaft sleeve (4) is inserted and installed in the bearing sleeve (3); A cooling water jacket (5) is installed on the lower wall of the sealed box (1), and the cooling water jacket (5) includes a main collar (51), a secondary collar (52), a water inlet pipe (53), a water outlet (54), a first water storage chamber (55), a second water storage chamber (56) and a connecting hole (57). The upper wall of the main collar (51) is installed with a secondary collar (52), and both the main collar (51) and the secondary collar (52) are arranged on the outside of the shaft sleeve (4). The upper wall of the secondary collar (52) is in close contact with the lower wall of the sealed box (1), and the inner cavity of the main collar (51) is provided with a secondary collar (52). A first water storage chamber (55) is provided, a second water storage chamber (56) is provided in the auxiliary collar (52), a connecting hole (57) is provided on the upper wall of the main collar (51), the connecting hole (57) connects the first water storage chamber (55) and the second water storage chamber (56) to each other, a water inlet pipe (53) is inserted into the side wall of the auxiliary collar (52), the water inlet pipe (53) is connected to the second water storage chamber (56), and a water outlet (54) is provided on the side wall of the main collar (51), the water outlet (54) is connected to the first water storage chamber (55); A partition (6) is installed in the second water storage chamber (56), and a through hole (7) is opened on the side wall of the partition (6). The partition (6) divides the second water storage chamber (56) into a serpentine water flow channel.

2. The impact-resistant mechanical seal according to claim 1, characterized in that: The upper wall of the cooling water jacket (5) and the lower wall of the sealing box (1) are both provided with a card slot (8), and an upper static ring (9) and a lower static ring (10) are respectively inserted and installed in the two card slots (8). The outer side of the shaft sleeve (4) is sleeved with a spring seat (11), and the upper and lower sides of the spring seat (11) are respectively provided with an upper dynamic ring (12) and a lower dynamic ring (13), and the upper dynamic ring (12) and the lower dynamic ring (13) can be respectively fitted with the upper static ring (9) and the lower static ring (10).

3. The impact-resistant mechanical seal according to claim 1, characterized in that: A bearing (14) is installed on the upper wall of the sealing box (1), and the bearing (14) is arranged outside the bearing sleeve (3). A bearing cover (15) is installed on the upper wall of the sealing box (1), and the bearing cover (15) is arranged above the bearing (14). A second bolt (16) is screwed into the upper wall of the bearing cover (15), and the bearing cover (15) is connected to the sealing box (1) through the second bolt (16).

4. The impact-resistant mechanical seal according to claim 1, characterized in that: The partition (6) comprises a plate body (61), a fixing frame (62) and an impeller (63); the plate body (61) is inserted and installed in the second water storage chamber (56); the fixing frame (62) is installed on the side wall of the plate body (61); the impeller (63) is rotatably installed in the middle of the fixing frame (62); and the impeller (63) is arranged in the through hole (7).

5. The impact-resistant mechanical seal according to claim 1, characterized in that: The outer side of the bearing sleeve (3) is sleeved with a fastening ring (17), and the side walls of the bearing sleeve (3) and the shaft sleeve (4) are both provided with threaded holes (18), and the two threaded holes (18) are in the same axis. A first bolt (19) is inserted into the side wall of the fastening ring (17), and the first bolt (19) passes through the side wall of the fastening ring (17) and is screwed into the threaded hole (18).

6. The impact-resistant mechanical seal according to claim 3, characterized in that: The upper wall of the bearing cover (15) is provided with a mounting hole (20), and a hanging ring (21) is inserted and installed in the mounting hole (20).

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