A main pump dynamic pressure seal ring seat structure

Abstract

The utility model provides a kind of main pump dynamic pressure sealing ring seat structure, including rotating ring assembly and stationary ring assembly;Rotating ring assembly includes rotating ring seat, rotating ring, rotating ring outer circle is equipped with rotating snap ring, pump shaft is rotated by shaft sleeve and drives rotating ring assembly, rotating snap ring is connected on the outside diameter of rotating ring seat and rotating ring, rotating ring seat and rotating ring are connected as a whole by rotating snap ring;Stationary ring assembly includes stationary ring seat, stationary ring, stationary ring outer circle is equipped with stationary snap ring, stationary snap ring is connected on the outside diameter of stationary ring seat and stationary ring, stationary ring seat, stationary ring are connected as a whole by stationary snap ring;Rotating ring and stationary ring are closely adjacent to be arranged, and the friction pair between the end face of rotating ring and stationary ring closely adjacent forms sealing surface;Spring adds the connecting block pin combination connection mode can effectively transmit torque, make dynamic ring assembly part combination as a whole, also can effectively prevent loosening and exit.

Description

Technical Field

[0001] This utility model belongs to the field of dynamic pressure shaft seal of nuclear power plant main pump, specifically relating to a sealing ring assembly for dynamic pressure shaft seal of nuclear main pump. Background Technology

[0002] The main pump is a key piece of equipment in a nuclear power plant. The mechanical seal is one of the key components of the main pump, used to limit the leakage of reactor coolant. It is also the most easily damaged component on the main pump. Even a slight operational deviation can cause abnormal leakage, or even lead to an emergency reactor shutdown, threatening the safe operation of the power plant and causing huge economic losses.

[0003] The shaft seals of main pumps in nuclear power plants require extremely high reliability, ensuring a stable leakage rate and long-term reliable operation. Under normal operating conditions, the main pump shaft seal components can withstand one-third of the pressure in the primary circuit, and under special circumstances, the full pressure of the primary circuit. The dynamic pressure shaft seal components of the main pump require high reliability, preventing loosening, cracking, or other damage during operation or under special conditions, ensuring the integrity of the components until normal shutdown. Because of the high reliability requirements of the dynamic pressure shaft seal components, traditional connection methods carry the potential risk of loosening and disengagement. If a component loosens, it can move as a foreign object within the sealing cavity with the fluid, causing seal damage and, in severe cases, leading to main pump shutdown. Utility Model Content

[0004] In view of the shortcomings of the prior art described above, the purpose of this utility model is to provide a sealing ring connection method to meet the high reliability requirements of the main pump dynamic pressure shaft seal components.

[0005] To achieve the above-mentioned objectives, the technical solution of this utility model is as follows:

[0006] A dynamic pressure sealing ring seat structure for a main pump includes a rotating ring assembly and a stationary ring assembly; the axial direction of the main pump shaft is defined as the x-direction, and the y-direction is perpendicular to the x-direction;

[0007] The rotating ring assembly includes a rotating ring seat 51 and a rotating ring 52. A rotating retainer 53 is provided on the outer circle of the rotating ring 52. The pump shaft drives the rotating ring assembly to rotate through the bushing 2. The rotating retainer 53 is engaged on the outer diameter of the rotating ring seat 51 and the rotating ring 52, and the rotating ring seat 51 and the rotating ring 52 are connected into a whole by the rotating retainer 53.

[0008] The stationary ring assembly includes a stationary ring seat 61 and a stationary ring 62. A stationary retaining ring 63 is provided on the outer circle of the stationary ring 62. The stationary retaining ring 63 is engaged with the outer diameter of the stationary ring seat 61 and the stationary ring 62, and the stationary ring seat 61 and the stationary ring 62 are connected into a whole by the stationary retaining ring 63.

[0009] The rotating ring 52 and the stationary ring 62 are arranged close to each other, and a friction pair is formed between the adjacent end faces of the rotating ring 52 and the stationary ring 62 as a sealing surface;

[0010] The pump shaft 1 of the main pump drives the rotating ring assembly to rotate through the bushing 2. The pin 9 is inserted into the stationary ring assembly. One end of the pin 9 is inserted into the stationary ring 62 and the other end is fixed on the cavity 10.

[0011] A compression spring 3 and a connecting block 4 are provided between the rotating ring seat 51 and the rotating retaining ring 53 in the y-direction. A radial hole A extending in the y-direction is provided inside the rotating ring seat 51. A radial hole B is provided in the rotating retaining ring 53 at the corresponding position of the radial hole A. The compression spring 3 is installed at the bottom of the radial hole A. The upper end of the connecting block 4 is inserted into the radial hole B.

[0012] A compression spring 3 and a connecting block 4 are provided between the stationary ring seat 61 and the stationary retaining ring 63 in the y direction. A radial hole A extending in the y direction is provided in the stationary ring seat 61. A radial hole B is provided in the stationary retaining ring 63 at the corresponding position of the radial hole A. The compression spring 3 is installed at the bottom of the radial hole A. The upper end of the connecting block 4 is inserted into the radial hole B.

[0013] The outer circle of the rotating ring 52 encloses the rotating ring sleeve 54, and the outer diameter of the rotating ring sleeve 54 is provided with a step A11. The rotating retaining ring 53 limits the x-direction position of the rotating ring 52 through the step A11.

[0014] The outer circle of the stationary ring 62 encloses the outer ring 64 of the stationary ring, and the outer diameter of the outer ring 64 of the stationary ring is provided with a step B12; the stationary retaining ring 63 limits the x-direction position of the stationary ring 62 through the step B12.

[0015] As a preferred embodiment, a first O-ring 7 is provided between the rotating ring seat 51 and the rotating ring 52, and a first O-ring 7 is provided between the stationary ring seat 61 and the stationary ring 62.

[0016] As a preferred embodiment, a second O-ring 8 is provided between the rotating ring seat 51 and the rotating retaining ring 53, and a second O-ring 8 is provided between the stationary ring seat 61 and the stationary retaining ring 63.

[0017] As a preferred embodiment, the first O-ring 7 is disposed in the groove between the rotating ring seat 51 and the rotating ring 52, or in the groove between the stationary ring seat 61 and the stationary ring 62.

[0018] As a preferred embodiment, the second O-ring 8 is placed in the groove between the rotating ring seat 51 and the rotating retaining ring 53, or in the groove between the stationary ring seat 61 and the stationary retaining ring 63.

[0019] As a preferred embodiment, pin 9 is positioned along the x-direction.

[0020] The working principle of this utility model is as follows:

[0021] The relative x-direction position of the rotating ring seat 51 and the rotating retaining ring 53 is defined by the compression spring 3 and the connecting block 4. The rotating retaining ring 53 defines the x-direction position of the rotating ring 52 by step A, and the inner diameter of the rotating retaining ring 53 defines the y-direction position of the rotating ring 52. The relative x-direction position of the stationary ring seat 61 and the stationary retaining ring 63 is defined by the compression spring 3 and the connecting block 4. The stationary retaining ring 63 defines the x-direction position of the stationary ring 62 by step B, and the inner diameter of the stationary retaining ring 63 defines the y-direction position of the stationary ring 62.

[0022] After the retaining ring is assembled in place, the spring springs up, and the connecting block connects the retaining ring and the ring seat, limiting its axial position; the ring assembly, O-ring, ring seat and retaining ring are assembled into a single unit by pins, and are used as a whole during assembly, transportation and operation.

[0023] The beneficial effects of this utility model are as follows:

[0024] The connection method of spring 2 plus connecting block 3 and pin combination can effectively transmit torque, make the dynamic ring assembly part into a whole, and effectively prevent loosening and withdrawal. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0026] Figure 2 This is a front view of the rotating ring outer sleeve, stationary ring outer sleeve, O-ring, step, and pin of this utility model.

[0027] Among them, 1-pump shaft, 2-shaft sleeve, 3-compression spring, 4-connecting block, 51-rotating ring seat, 52-rotating ring, 53-rotating retaining ring, 54-rotating ring outer sleeve, 61-stationary ring seat, 62-stationary ring, 63-stationary retaining ring, 64-stationary ring outer sleeve, 7-first O-ring, 8-second O-ring, 9-pin, 10-cavity, 11-step A, 12-step B. Detailed Implementation

[0028] The following specific examples illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. This utility model can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this utility model.

[0029] like Figure 1 As shown, this embodiment provides a main pump dynamic pressure sealing ring seat structure, including a rotating ring assembly and a stationary ring assembly; the axial direction of the main pump shaft is set as the x-direction, and the y-direction is perpendicular to the x-direction;

[0030] The rotating ring assembly includes a rotating ring seat 51 and a rotating ring 52. A rotating retainer 53 is provided on the outer circle of the rotating ring 52. The pump shaft drives the rotating ring assembly to rotate through the bushing 2. The rotating retainer 53 is engaged on the outer diameter of the rotating ring seat 51 and the rotating ring 52, and the rotating ring seat 51 and the rotating ring 52 are connected into a whole by the rotating retainer 53.

[0031] The stationary ring assembly includes a stationary ring seat 61 and a stationary ring 62. A stationary retaining ring 63 is provided on the outer circle of the stationary ring 62. The stationary retaining ring 63 is engaged with the outer diameter of the stationary ring seat 61 and the stationary ring 62, and the stationary ring seat 61 and the stationary ring 62 are connected into a whole by the stationary retaining ring 63.

[0032] The rotating ring 52 and the stationary ring 62 are arranged close to each other, and a friction pair is formed between the adjacent end faces of the rotating ring 52 and the stationary ring 62 as a sealing surface;

[0033] The pump shaft 1 of the main pump drives the rotating ring assembly to rotate through the bushing 2. The pin 9 is inserted into the stationary ring assembly. One end of the pin 9 is inserted into the stationary ring 62 and the other end is fixed on the cavity 10.

[0034] A compression spring 3 and a connecting block 4 are provided between the rotating ring seat 51 and the rotating retaining ring 53 in the y-direction. A radial hole A extending in the y-direction is provided inside the rotating ring seat 51. A radial hole B is provided in the rotating retaining ring 53 at the corresponding position of the radial hole A. The compression spring 3 is installed at the bottom of the radial hole A. The upper end of the connecting block 4 is inserted into the radial hole B.

[0035] A compression spring 3 and a connecting block 4 are provided between the stationary ring seat 61 and the stationary retaining ring 63 in the y direction. A radial hole A extending in the y direction is provided in the stationary ring seat 61. A radial hole B is provided in the stationary retaining ring 63 at the corresponding position of the radial hole A. The compression spring 3 is installed at the bottom of the radial hole A. The upper end of the connecting block 4 is inserted into the radial hole B.

[0036] like Figure 2 As shown, the outer circle of the rotating ring 52 encloses the rotating ring sleeve 54, and the outer diameter of the rotating ring sleeve 54 is provided with a step A11. The rotating retaining ring 53 limits the x-direction position of the rotating ring 52 through the step A11.

[0037] like Figure 2 As shown, the outer circle of the stationary ring 62 encloses the outer ring 64 of the stationary ring, and the outer diameter of the outer ring 64 of the stationary ring is provided with a step B12; the stationary retaining ring 63 limits the x-direction position of the stationary ring 62 through the step B12.

[0038] like Figure 2 As shown, in a preferred embodiment, a first O-ring 7 is provided between the rotating ring seat 51 and the rotating ring 52, and a first O-ring 7 is provided between the stationary ring seat 61 and the stationary ring 62.

[0039] like Figure 2As shown, in a preferred embodiment, a second O-ring 8 is provided between the rotating ring seat 51 and the rotating retaining ring 53, and a second O-ring 8 is provided between the stationary ring seat 61 and the stationary retaining ring 63.

[0040] As a preferred embodiment, the first O-ring 7 is disposed in the groove between the rotating ring seat 51 and the rotating ring 52, or in the groove between the stationary ring seat 61 and the stationary ring 62.

[0041] As a preferred embodiment, the second O-ring 8 is placed in the groove between the rotating ring seat 51 and the rotating retaining ring 53, or in the groove between the stationary ring seat 61 and the stationary retaining ring 63.

[0042] As a preferred embodiment, pin 9 is positioned along the x-direction.

[0043] The working principle of this utility model is as follows: The relative x-direction position of the rotating ring seat 51 and the rotating retaining ring 53 is defined by the compression spring 3 and the connecting block 4. The rotating retaining ring 53 defines the x-direction position of the rotating ring 52 via step A, and its inner diameter defines the y-direction position of the rotating ring 52. The relative x-direction position of the stationary ring seat 61 and the stationary retaining ring 63 is defined by the compression spring 3 and the connecting block 4. The stationary retaining ring 63 defines the x-direction position of the stationary ring 62 via step B, and its inner diameter defines the y-direction position of the stationary ring 62.

[0044] After the retaining ring is assembled in place, the spring springs up, and the connecting block connects the retaining ring and the ring seat, limiting its axial position; the ring assembly, O-ring, ring seat and retaining ring are assembled into a single unit by pins, and are used as a whole during assembly, transportation and operation.

[0045] The above embodiments are merely illustrative of the principles and effects of this utility model and are not intended to limit the scope of this utility model. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.

Claims

1. A dynamic pressure sealing ring seat structure for a main pump, characterized in that: Includes a rotating ring assembly and a stationary ring assembly; the axial direction of the main pump shaft is set as the x-direction, and the y-direction is perpendicular to the x-direction; The rotating ring assembly includes a rotating ring seat (51) and a rotating ring (52). The outer circle of the rotating ring (52) is provided with a rotating retainer (53). The pump shaft drives the rotating ring assembly to rotate through the bushing (2). The rotating retainer (53) is engaged on the outer diameter of the rotating ring seat (51) and the rotating ring (52). The rotating ring seat (51) and the rotating ring (52) are connected into a whole by the rotating retainer (53). The stationary ring assembly includes a stationary ring seat (61) and a stationary ring (62). The outer circle of the stationary ring (62) is provided with a stationary retaining ring (63). The stationary retaining ring (63) is engaged with the outer diameter of the stationary ring seat (61) and the stationary ring (62). The stationary ring seat (61) and the stationary ring (62) are connected into a whole by the stationary retaining ring (63). The rotating ring (52) and the stationary ring (62) are arranged close to each other, and a friction pair is formed between the adjacent end faces of the rotating ring (52) and the stationary ring (62) as a sealing surface; The pump shaft (1) of the main pump drives the rotating ring assembly to rotate through the bushing (2). The pin (9) is inserted into the stationary ring assembly. One end of the pin (9) is inserted into the stationary ring (62) and the other end is fixed on the cavity (10). A compression spring (3) and a connecting block (4) are provided between the rotating ring seat (51) and the rotating retainer (53) in the y direction. A radial hole A extending in the y direction is provided inside the rotating ring seat (51). A radial hole B is provided in the rotating retainer (53) at the corresponding position of the radial hole A. The compression spring (3) is installed at the bottom of the radial hole A. The upper end of the connecting block (4) is inserted into the radial hole B. A compression spring (3) and a connecting block (4) are provided between the stationary ring seat (61) and the stationary retaining ring (63) in the y direction. A radial hole A extending in the y direction is provided in the stationary ring seat (61). A radial hole B is provided in the stationary retaining ring (63) at the corresponding position of the radial hole A. A compression spring (3) is installed at the bottom of the radial hole A. The upper end of the connecting block (4) is inserted into the radial hole B. The outer circle of the rotating ring (52) encloses the rotating ring sleeve (54), and the outer diameter of the rotating ring sleeve (54) is provided with a step A (11). The rotating retainer (53) limits the x-position of the rotating ring (52) through the step A (11). The outer circle of the stationary ring (62) encloses the outer sleeve of the stationary ring (64), and the outer diameter of the outer sleeve of the stationary ring (64) is provided with step B (12); the stationary retaining ring (63) limits the x-direction position of the stationary ring (62) through step B (12).

2. The main pump dynamic pressure sealing ring seat structure according to claim 1, characterized in that: There is a first O-ring (7) between the rotating ring seat (51) and the rotating ring (52), and there is a first O-ring (7) between the stationary ring seat (61) and the stationary ring (62).

3. The main pump dynamic pressure sealing ring seat structure according to claim 1, characterized in that: There is a second O-ring (8) between the rotating ring seat (51) and the rotating retaining ring (53), and there is a second O-ring (8) between the stationary ring seat (61) and the stationary retaining ring (63).

4. The main pump dynamic pressure sealing ring seat structure according to claim 2, characterized in that: The first O-ring (7) is disposed in the groove between the rotating ring seat (51) and the rotating ring (52), or in the groove between the stationary ring seat (61) and the stationary ring (62).

5. The main pump dynamic pressure sealing ring seat structure according to claim 3, characterized in that: The second O-ring (8) is placed in the groove between the rotating ring seat (51) and the rotating retaining ring (53), or in the groove between the stationary ring seat (61) and the stationary retaining ring (63).

6. The main pump dynamic pressure sealing ring seat structure according to claim 1, characterized in that: The pin (9) is set along the x-direction.

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