Pump shaft sealing structure of liquid oxygen pump

Abstract

The utility model relates to the technical field of liquid oxygen pumps, and provides a liquid oxygen pump shaft sealing structure which comprises a shell, a pump rotating shaft is arranged in the shell, a sealing assembly is installed in the shell, a fixing assembly is installed outside the shell through a bolt, and a rotating assembly is fixedly connected outside the pump rotating shaft. A positioning ring outside a fixing block is rotationally connected with a guide rail inside the shaft sleeve; the shaft sleeve is sleeved with a silica gel sleeve; the silica gel sleeve is fixed by a hoop through a connecting block by using a bolt; a driving ring is connected with a driven ring by using a screw, so that the connecting block is arranged in a groove inside the driving ring; the ball body is in rolling connection in the fixing block and the shaft sleeve, so that the pump shaft is sealed, and high-pressure liquid can be well prevented from leaking out of the pump along the shaft and external air can be well prevented from permeating into the shaft. By means of the technical scheme, the problem that in the prior art, the problem that high-pressure liquid leaks out of the pump along the shaft cannot be well solved.

Description

Technical Field

[0001] The utility model relates to the technical field of liquid oxygen pumps, and in particular to a pump shaft sealing structure of a liquid oxygen pump. Background Art

[0002] A liquid oxygen pump is a cryogenic liquid pump used to increase the pressure of liquid oxygen for transport. It is commonly used as a liquid oxygen circulation pump in the main condenser evaporator, as a process liquid oxygen pump between parallel upper and lower towers, as a product liquid oxygen pump in internal compression processes, and as a liquid oxygen pump for storage tanks. Liquid oxygen pumps can be categorized into two types: centrifugal and plunger. Plunger pumps are generally used for pumping low-flow, high-pressure liquids. Centrifugal liquid oxygen pumps are widely used in large and medium-sized low-pressure air separation units, such as meter-hour oxygen concentrators. Centrifugal liquid oxygen pumps are further categorized as single-stage or multi-stage.

[0003] The pump shaft seal is a crucial component of any pump, directly impacting its proper operation and efficiency. The primary purpose of a pump shaft seal is to prevent high-pressure liquid from leaking out along the shaft, or air from seeping in. Traditional sealing devices fail to perform this sealing function effectively, reducing pump efficiency. Utility Model Content

[0004] The utility model provides a liquid oxygen pump shaft sealing structure, which solves the problem in the related art that leakage of high-pressure liquid from the pump along the shaft cannot be well solved.

[0005] The technical solution of the utility model is as follows: A liquid oxygen pump shaft sealing structure includes a shell, a pump rotating shaft is provided inside the shell, a sealing assembly is installed inside the shell, a fixing assembly is installed on the outside of the shell by bolts, the outside of the pump rotating shaft is fixedly connected to the rotating assembly, the inside of the shell is fixedly connected to the partition, and the outside of the pump rotating shaft is fixedly connected to the dynamic ring assembly.

[0006] Preferably, the sealing assembly includes a fixed block, which is fixed inside the shell, a positioning ring is fixedly connected to the outside of the fixed block, a support block is fixedly connected to the inside of the shell, a sealing block is fixedly installed inside the support block, and a ball is rollingly connected to the inside of the fixed block.

[0007] Preferably, the rotating assembly includes a rotating block, which is fixedly mounted on the outside of the pump rotating shaft, a shaft sleeve is fixedly mounted on the outside of the pump rotating shaft, a guide sleeve is fixedly mounted on the outside of the pump rotating shaft, a guide ring is fixedly mounted on the inside of the guide sleeve, a guide rail is fixedly connected to the inside of the shaft sleeve, and the inside of the guide rail is rotatably connected to the outside of the positioning ring.

[0008] Preferably, the fixing assembly includes a fixing plate, which is fixedly installed on the outside of the shell by bolts, the outside of the fixing plate is fixedly connected to a pressure cover, the inside of the pressure cover is fixedly installed with a sealing gasket, the outside of the partition is fixedly connected to a limiting ring, and the outside of the limiting ring is in contact with the outside of the sealing gasket.

[0009] Preferably, the dynamic ring assembly includes a silicone sleeve, which is fixedly mounted on the outside of the pump rotating shaft. A clamp is fixedly mounted on the outside of the silicone sleeve, and a connecting block is fixedly connected to the outside of the clamp. The connecting block fixes the clamp to the outside of the silicone sleeve through bolts.

[0010] Preferably, an active ring is fixedly installed on the outside of the connecting block, screws are provided inside the active ring, an auxiliary dynamic ring is fixedly installed on the outside of the active ring by screws, the connecting block is located inside the active ring and the auxiliary dynamic ring, and springs are fixedly connected inside the active ring and the auxiliary dynamic ring.

[0011] Preferably, a sealing ring is fixedly installed inside the rotating block.

[0012] Preferably, the exterior of the sealing block contacts the exterior of the shaft sleeve.

[0013] The working principle and beneficial effects of the utility model are as follows:

[0014] 1. In the present invention, the pump rotating shaft is installed inside the rotating assembly, so that the rotating assembly is connected to the pump rotating shaft. When the pump rotating shaft is rotated, impurities in the air pass through the space between the rotating block and the outer shell, and the air is isolated under the protection of the sealing block. The external positioning ring of the fixed block is rotatably connected to the guide rail inside the shaft sleeve. The silicone sleeve is arranged on the outside of the shaft sleeve. The connecting block is fixed with a bolt so that the clamp fixes the silicone sleeve. The active ring and the auxiliary active ring are connected with a screw so that the connecting block is arranged in the groove inside the active ring. The ball is rolled and connected inside the fixed block and the shaft sleeve, so that the pump shaft is sealed, which can effectively prevent the high-pressure liquid from leaking along the shaft from the pump and the outside air from penetrating along the shaft. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The present invention will be further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0016] Figure 1 This is a schematic diagram of the internal structure of the utility model;

[0017] Figure 2 This is a schematic diagram of the structure of the rotating assembly of the utility model;

[0018] Figure 3 This is a schematic diagram of a partial main cross-sectional structure of the utility model;

[0019] Figure 4 This is a schematic diagram of the dynamic ring structure of the utility model;

[0020] Figure 5 For this utility model Figure 1 Enlarged view of point a in the middle;

[0021] Figure 6 For this utility model Figure 4 Enlarged view of point b in the middle;

[0022] Figure 7 For this utility model Figure 4 Enlarged image of point c in the middle;

[0023] In the figure: 1. Housing; 2. Pump rotating shaft; 3. Sealing assembly; 31. Fixed block; 32. Support block; 33. Sealing block; 34. Ball; 35. Guide rail; 36. Positioning ring; 4. Rotating assembly; 41. Rotating block; 42. Sealing ring; 43. Bushing; 44. Guide sleeve; 45. Guide ring; 5. Fixed assembly; 51. Fixed plate; 52. Sealing gasket; 53. Limiting ring; 54. Pressure cover; 6. Partition; 7. Dynamic ring assembly; 71. Active ring; 72. Auxiliary dynamic ring; 73. Silicone sleeve; 74. Clamp; 75. Connecting block; 76. Screw; 77. Spring. DETAILED DESCRIPTION

[0024] The following will be combined with the embodiments of the present invention 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.

[0025] Example 1

[0026] like Figures 1 to 7 As shown, this embodiment proposes a liquid oxygen pump shaft sealing structure, including a shell 1, a pump rotating shaft 2 is arranged inside the shell 1, a sealing assembly 3 is installed inside the shell 1, a fixing assembly 5 is installed on the outside of the shell 1 by bolts, a rotating assembly 4 is fixedly connected to the outside of the pump rotating shaft 2, a partition 6 is fixedly connected to the inside of the shell 1, and a dynamic ring assembly 7 is fixedly connected to the outside of the pump rotating shaft 2.

[0027] Furthermore, the sealing assembly 3 includes a fixed block 31, which is fixed inside the outer shell 1. A positioning ring 36 is fixedly connected to the outside of the fixed block 31. A support block 32 is fixedly connected to the inside of the outer shell 1. A sealing block 33 is fixedly installed inside the support block 32. A ball 34 is rollingly connected to the inside of the fixed block 31. The outside of the sealing block 33 is in contact with the outside of the sleeve 43. The positioning ring 45 outside the fixed block 31 is rotatably connected to the guide rail 35 inside the sleeve 43 to isolate the inside of the outer shell 1.

[0028] Furthermore, the rotating assembly 4 includes a rotating block 41, which is fixedly mounted on the outside of the pump rotating shaft 2, a shaft sleeve 43 is fixedly mounted on the outside of the pump rotating shaft 2, a guide sleeve 44 is fixedly mounted on the outside of the pump rotating shaft 2, a guide ring 45 is fixedly mounted inside the guide sleeve 44, a guide rail 35 is fixedly connected to the inside of the shaft sleeve 43, the inside of the guide rail 35 is rotatably connected to the outside of the positioning ring 36, and a sealing ring 42 is fixedly mounted inside the rotating block 41, so that the rotating assembly 4 is connected to the pump rotating shaft 2, making it more convenient to seal the pump rotating shaft 2.

[0029] Furthermore, the fixing assembly 5 includes a fixing plate 51, which is fixedly installed on the outside of the shell 1 by bolts. The outside of the fixing plate 51 is fixedly connected to a pressure cover 54, and the inside of the pressure cover 54 is fixedly installed with a sealing gasket 52. The outside of the partition 6 is fixedly connected to a limiting ring 53, and the outside of the limiting ring 53 is in contact with the outside of the sealing gasket 52 to seal the shell 1 to prevent high-pressure liquid from leaking from the rear.

[0030] The outer ends of the cams 72 are fixedly fastened to the engagement ring 71 and the engagement ring 72 is engaged with the engagement ring 71 by screws 76. The engagement ring 71 is then engaged with the engagement ring 72 ...

[0031] In this embodiment, the pump rotating shaft 2 is installed inside the rotating assembly 4, so that the rotating assembly 4 is connected to the pump rotating shaft 2. When the pump rotating shaft 2 is rotated, impurities in the air pass through the rotating block 41 and the outer shell 1, and the air is isolated under the protection of the sealing block 33. The external positioning ring 45 of the fixed block 31 is rotatably connected to the guide rail 35 inside the sleeve 43. The silicone sleeve 73 is sleeved on the outside of the sleeve 43. The connecting block 75 is bolted to fix the silicone sleeve 73 with the clamp 74. The active ring 71 and the auxiliary active ring 72 are connected with the screw 76, so that the connecting block 75 is set in the groove inside the active ring 71. The ball 34 is rollingly connected inside the fixed block 31 and the sleeve 43, so that the pump shaft is sealed.

[0032] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A liquid oxygen pump shaft sealing structure, characterized in that: The invention comprises a housing (1), a pump rotating shaft (2) is provided inside the housing (1), a sealing assembly (3) is installed inside the housing (1), a fixing assembly (5) is installed outside the housing (1) via bolts, a rotating assembly (4) is fixedly connected to the outside of the pump rotating shaft (2), a partition (6) is fixedly connected to the inside of the housing (1), and a dynamic ring assembly (7) is fixedly connected to the outside of the pump rotating shaft (2).

2. A liquid oxygen pump shaft sealing structure according to claim 1, characterized in that: The sealing assembly (3) comprises a fixed block (31), the fixed block (31) being fixed inside the housing (1), a positioning ring (36) being fixedly connected to the outside of the fixed block (31), a support block (32) being fixedly connected to the inside of the housing (1), a sealing block (33) being fixedly installed inside the support block (32), and a ball (34) being rollingly connected to the inside of the fixed block (31).

3. A liquid oxygen pump shaft sealing structure according to claim 2, characterized in that: The rotating assembly (4) includes a rotating block (41), the rotating block (41) is fixedly mounted on the outside of the pump rotating shaft (2), a shaft sleeve (43) is fixedly mounted on the outside of the pump rotating shaft (2), a guide sleeve (44) is fixedly mounted on the outside of the pump rotating shaft (2), a guide ring (45) is fixedly mounted on the inside of the guide sleeve (44), a guide rail (35) is fixedly connected to the inside of the shaft sleeve (43), and the inside of the guide rail (35) is rotatably connected to the outside of the positioning ring (36).

4. A liquid oxygen pump shaft sealing structure according to claim 1, characterized in that: The fixing assembly (5) includes a fixing plate (51), the fixing plate (51) is fixedly mounted on the outside of the housing (1) by means of bolts, the fixing plate (51) is fixedly connected to the outside with a gland (54), the gland (54) is fixedly mounted to the inside with a sealing gasket (52), the partition (6) is fixedly connected to the outside with a limiting ring (53), and the outside of the limiting ring (53) is in contact with the outside of the sealing gasket (52).

5. The liquid oxygen pump shaft sealing structure according to claim 1, characterized in that: The dynamic ring assembly (7) includes a silicone sleeve (73), the silicone sleeve (73) is fixedly mounted on the outside of the pump rotating shaft (2), a clamp (74) is fixedly mounted on the outside of the silicone sleeve (73), the clamp (74) is fixedly connected to the outside of the connecting block (75), and the connecting block (75) fixes the clamp (74) to the outside of the silicone sleeve (73) through bolts.

6. A liquid oxygen pump shaft sealing structure according to claim 5, characterized in that: An active ring (71) is fixedly mounted on the outside of the connecting block (75), a screw (76) is provided inside the active ring (71), and an auxiliary dynamic ring (72) is fixedly mounted on the outside of the active ring (71) via the screw (76). The connecting block (75) is located inside the active ring (71) and the auxiliary dynamic ring (72), and a spring (77) is fixedly connected inside the active ring (71) and the auxiliary dynamic ring (72).

7. The liquid oxygen pump shaft sealing structure according to claim 3, characterized in that: A sealing ring (42) is fixedly installed inside the rotating block (41).

8. The liquid oxygen pump shaft sealing structure according to claim 3, characterized in that: The exterior of the sealing block (33) contacts the exterior of the shaft sleeve (43).

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