Pump mechanical oil seal mounting device of steam-water separator reheater system for nuclear power

Abstract

The utility model relates to a nuclear power steam-water separator reheater system pump mechanical oil seal installation device which comprises a sleeve, the sleeve is a hollow sleeve body, at least one end of the sleeve is provided with an opening allowing a pump shaft of a nuclear power steam-water separator reheater system pump to enter, and the inner wall of the sleeve is provided with a limiting structure used for being matched with the pump shaft. The limiting structure is used for being matched with the pump shaft to radially limit the sleeve when the sleeve is arranged on the pump shaft in a sleeving mode, and the end face of the end, provided with the opening, of the sleeve is perpendicular to the axial direction of the sleeve to serve as a working face for press fitting of the mechanical oil seal. According to the steam-water separator reheater system pump mechanical oil seal installation device for nuclear power, the mechanical oil seal can be conveniently and rapidly pressed in place, the overhaul efficiency is improved, the overhaul period is shortened, and the safety of equipment and personnel after overhaul is improved.

Description

Technical Field

[0001] This utility model relates to the field of mechanical oil seal installation technology for pumps, and in particular to a mechanical oil seal installation device for a pump in a nuclear power plant steam-water separator reheater system. Background Technology

[0002] Pumps in nuclear power plant steam-water separator reheater systems deliver the medium and provide system pressure. During equipment disassembly and maintenance, the installation of mechanical oil seals is crucial for ensuring equipment availability. During maintenance, negligence by maintenance personnel can easily lead to oil seals being misaligned or not properly installed.

[0003] Based on the above problems, there is an urgent need for a dedicated tool for installing mechanical oil seals on pumps in nuclear power steam-water separator reheater systems to ensure proper installation of the mechanical oil seals. Utility Model Content

[0004] The purpose of this utility model is to provide a mechanical oil seal installation device for a pump in a nuclear power plant steam-water separator reheater system, so as to facilitate the installation of the mechanical oil seal and improve maintenance efficiency.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A mechanical oil seal installation device for a pump in a nuclear power plant steam-water separator reheater system includes a sleeve, which is a hollow cylinder. At least one end of the sleeve has an opening for the pump shaft of the nuclear power plant steam-water separator reheater system pump to enter. The inner wall of the sleeve is provided with a limiting structure for cooperating with the pump shaft. The limiting structure is used to cooperate with the pump shaft when the sleeve is sleeved on the pump shaft to radially limit the sleeve. The end face of the sleeve with the opening is perpendicular to the axial direction of the sleeve to serve as a working surface for press-fitting the mechanical oil seal.

[0007] In one embodiment of this application, the limiting structure includes a plurality of annular limiting bosses, each of the annular limiting bosses being axially spaced on the inner wall of the sleeve, and the inner annular wall of the annular limiting bosses being used to cooperate with the pump shaft.

[0008] In one embodiment of this application, the diameter of the inner ring wall of one of the annular limiting bosses near the working surface is larger than the diameter of the inner ring wall of the other annular limiting bosses.

[0009] In one embodiment of this application, the annular surface of one of the annular limiting bosses near the working surface is flush with the working surface on the side away from the other annular limiting bosses.

[0010] In one embodiment of this application, the inner ring wall of one of the annular limiting bosses near the working surface includes a first cylindrical segment and a first conical segment. The first cylindrical segment is connected to the end of the first conical segment away from the working surface, and the first conical segment gradually expands from the end connected to the first cylindrical segment.

[0011] In one embodiment of this application, an annular limiting stop is provided on the inner wall of the sleeve at the end away from the working surface. The annular limiting stop is used to cooperate with the end face of the pump shaft to limit the axial travel of the sleeve.

[0012] In one embodiment of this application, the end of the sleeve away from the working surface is provided with a clearance hole for avoiding the shaft end stud structure.

[0013] In one embodiment of this application, the wall of the clearance hole includes a second cylindrical section and a second conical section. The second cylindrical section is connected to the end of the second conical section away from the working surface, and the second conical section gradually expands from the end connected to the second cylindrical section.

[0014] In one embodiment of this application, the working surface is provided with a buffer structure.

[0015] In one embodiment of this application, the buffer structure is a flexible buffer pad.

[0016] As can be seen from the above technical solutions, this utility model discloses a mechanical oil seal installation device for a nuclear power plant steam-water separator reheater system pump. The mechanical oil seal installation device for a nuclear power plant steam-water separator reheater system pump includes a sleeve, which is a hollow cylinder. At least one end of the sleeve has an opening for the pump shaft of the nuclear power plant steam-water separator reheater system pump to enter. The inner wall of the sleeve is provided with a limiting structure for cooperating with the pump shaft. The limiting structure is used to cooperate with the pump shaft when the sleeve is sleeved on the pump shaft to radially limit the sleeve. The end face of the sleeve with the opening is perpendicular to the axial direction of the sleeve to serve as a working surface for press-fitting the mechanical oil seal.

[0017] In application, the mechanical oil seal to be press-fitted is first fitted onto the pump shaft, and then the aforementioned sleeve is fitted onto the pump shaft. At this time, due to the limiting structure of the inner wall of the sleeve cooperating with the pump shaft, the sleeve is radially limited, so that the sleeve can only move back and forth along the axial direction of the pump shaft. The working surface perpendicular to the axial direction of the sleeve can apply a force along the pump shaft direction to the entire mechanical oil seal during the movement, thereby making it convenient and quick to press-fit the mechanical oil seal into place, improving maintenance efficiency, shortening the overhaul period, and increasing the safety of equipment and personnel after maintenance. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a cross-sectional view of a pump mechanical oil seal installation device for a nuclear power steam-water separator reheater system provided in one embodiment of the present invention;

[0020] Figure 2 This is a sectional front view of a pump mechanical oil seal installation device for a nuclear power steam-water separator reheater system provided in one embodiment of the present invention;

[0021] Figure 3 A cross-sectional view of the mechanical oil seal installation device for a pump in a nuclear power steam-water separator reheater system, provided in another embodiment of this utility model;

[0022] Figure 4 A sectional front view of the mechanical oil seal installation device for a nuclear power steam-water separator reheater system pump, provided in another embodiment of this utility model.

[0023] In the picture:

[0024] 1 is a sleeve; 2a and 2b are annular limiting bosses; 3 is an opening; 4 is a working surface; 5 is a clearance hole; 6 is annular limiting stop. Detailed Implementation

[0025] The core of this utility model is to provide a mechanical oil seal installation device for a pump in a nuclear power plant steam-water separator reheater system. The structural design of this device enables the mechanical oil seal to be easily installed, thereby improving maintenance efficiency.

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] Please see Figure 1 and Figure 2 , Figure 1 This is a cross-sectional view of a pump mechanical oil seal installation device for a nuclear power plant steam-water separator reheater system, provided in one embodiment of the present invention. Figure 2This is a sectional front view of the mechanical oil seal installation device for a nuclear power steam-water separator reheater system pump, provided in one embodiment of the present invention.

[0028] This utility model discloses a mechanical oil seal installation device for a nuclear power plant steam-water separator reheater system pump. The mechanical oil seal installation device for a nuclear power plant steam-water separator reheater system pump includes a sleeve 1. The sleeve 1 is made of a rigid material, including but not limited to plastic and metal. The sleeve 1 is a hollow cylinder, and at least one end of the sleeve 1 has an opening 3 for the pump shaft of the nuclear power plant steam-water separator reheater system pump to enter. The inner wall of the sleeve 1 is provided with a limiting structure for cooperating with the pump shaft. The limiting structure is used to cooperate with the pump shaft when the sleeve 1 is sleeved on the pump shaft to radially limit the sleeve 1. The end face of the sleeve 1 with the opening 3 is perpendicular to the axial direction of the sleeve 1 to serve as a working surface 4 for press-fitting the mechanical oil seal.

[0029] Compared with the prior art, the mechanical oil seal installation device for the nuclear power steam-water separation reheater system pump provided in this embodiment first places the mechanical oil seal to be pressed onto the pump shaft, and then places the sleeve 1 onto the pump shaft. At this time, due to the limiting structure of the inner wall of the sleeve 1 cooperating with the pump shaft, the sleeve 1 is radially limited, so that the sleeve 1 can only move back and forth along the axial direction of the pump shaft. The working surface 4, which is perpendicular to the axial direction of the sleeve 1, can apply a force along the pump shaft direction to the mechanical oil seal as a whole during the movement, thereby making it convenient and quick to press the mechanical oil seal into place, improving maintenance efficiency, shortening the overhaul period, and increasing the safety of equipment and personnel after maintenance.

[0030] like Figures 1 to 4 As shown, in one embodiment of this application, the limiting structure includes multiple annular limiting bosses. Each annular limiting boss is axially spaced on the inner wall of the sleeve 1. The inner annular wall of the annular limiting boss is used to cooperate with the pump shaft. It should be noted that the diameter of the inner annular wall of each annular limiting boss can be the same or different.

[0031] The diameter of the inner wall of the sleeve 1 between two adjacent annular limiting bosses is larger than the diameter of the pump shaft. This reduces the overall weight of the sleeve 1 and also reduces the friction between the sleeve 1 and the pump shaft when the sleeve 1 is fitted onto the pump shaft.

[0032] To facilitate the pump shaft entering the sleeve 1, in one specific embodiment, such as Figures 1 to 4 As shown, the diameter of the inner ring wall of one annular limiting boss 2a near the working surface 4 is larger than the diameter of the inner ring wall of the other annular limiting bosses 2b.

[0033] Further optimize the above technical solutions, such as Figures 1 to 4As shown, the annular limiting boss 2a near the working surface 4 has its annular surface on the side away from the other annular limiting bosses 2b flush with the working surface 4, so as to increase the area of ​​the working surface 4, increase the contact area between the sleeve 1 and the mechanical oil seal, increase the stability during pressing, and at the same time ensure that the mechanical oil seal is subjected to more uniform force.

[0034] The inner ring wall of an annular limiting boss 2a near the working surface 4 includes a first cylindrical section and a first conical section. The first cylindrical section is connected to the end of the first conical section away from the working surface 4. The first conical section gradually expands from the end connected to the first cylindrical section. Through the above structure, a flared structure can be formed on the inner ring wall of an annular limiting boss 2a near the working surface 4, which facilitates the pump shaft to enter the sleeve 1.

[0035] To facilitate maintenance personnel in understanding whether the mechanical oil seal has been pressed into place, thereby improving the pressing efficiency of the mechanical oil seal, the length of sleeve 1 should be set according to the length of the pump shaft to which the mechanical oil seal needs to be pressed in. That is, an annular limiting stop 6 is provided on the inner wall of the sleeve 1 at the end away from the working surface 4. The annular limiting stop 6 is used to cooperate with the shaft end face of the pump shaft to limit the axial travel of sleeve 1. In application, when the mechanical oil seal is not pressed into place, there is a gap between the annular limiting stop 6 and the shaft end face of the pump shaft. When the maintenance personnel press the mechanical oil seal into place along the axial direction of the pump shaft, the annular limiting stop 6 is in contact with the shaft end face of the pump shaft, thereby playing the role of axial limiting of sleeve 1, so as to indicate to the maintenance personnel that the mechanical oil seal has been pressed into place.

[0036] It should be noted that both the drive end and the non-drive end of the pump in the nuclear power plant's steam-water separator reheater system require press-fitted mechanical oil seals. Therefore, the structures of the sleeve 1 used for the drive end and the non-drive end of the pump in the nuclear power plant's steam-water separator reheater system are slightly different. Figure 1 and Figure 2 In the illustrated embodiment, sleeve 1 is used for the non-drive end of the pump in the nuclear power plant steam-water separator reheater system. Since the pump shaft at the non-drive end of the nuclear power plant steam-water separator reheater system pump needs to be fitted with an impeller, a stud structure is also provided on the end face of the pump shaft at the non-drive end of the nuclear power plant steam-water separator reheater system pump. To prevent this stud structure from affecting the pressing of sleeve 1 into the mechanical oil seal, Figure 1 and Figure 2 In the embodiment shown, the end of the sleeve 1 away from the working surface 4 is provided with a clearance hole 5 for avoiding the stud structure at the shaft end, so that the stud structure can pass through.

[0037] However, the pump shaft at the drive end of the pump in a nuclear power plant's steam-water separator reheater system does not require an impeller, therefore... Figure 3 and Figure 4 As shown, the end of the sleeve 1 away from the working surface 4 may have an opening, or it may not have an opening.

[0038] To further optimize the above technical solution and facilitate the passage of the stud structure through the clearance hole 5, in one embodiment of this application, the hole wall of the clearance hole 5 includes a second cylindrical section and a second conical section. The second cylindrical section is connected to the end of the second conical section away from the working surface 4. The second conical section gradually expands from the end connected to the second cylindrical section, thereby forming a flared structure on the hole wall of the clearance hole 5 at the end close to the working surface 4, which facilitates the passage of the stud structure.

[0039] To protect the mechanical oil seal during the pressing process and prevent damage to the mechanical oil seal by the sleeve 1, in one embodiment of this application, a buffer structure is provided on the working surface 4. Specifically, the buffer structure is a flexible buffer pad.

[0040] It should be noted that the various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0041] This article uses specific examples to illustrate the principles and implementation methods of this utility model. The descriptions of the above embodiments are only for the purpose of helping to understand the core ideas of this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made to this utility model without departing from the principles of this utility model, and these improvements and modifications also fall within the protection scope of the claims of this utility model.

Claims

1. A mechanical oil seal installation device for a pump in a nuclear power plant steam-water separator reheater system, characterized in that, Includes a sleeve (1), which is a hollow cylinder. At least one end of the sleeve (1) has an opening (3) for the pump shaft of the nuclear power plant steam-water separation reheater system pump to enter. The inner wall of the sleeve (1) is provided with a limiting structure for cooperating with the pump shaft. The limiting structure is used to cooperate with the pump shaft when the sleeve (1) is sleeved on the pump shaft to radially limit the sleeve (1). The end face of the sleeve (1) with the opening (3) is perpendicular to the axial direction of the sleeve (1) to serve as a working surface (4) for press-fitting mechanical oil seals.

2. The mechanical oil seal installation device for the pump of the nuclear power plant steam-water separator reheater system according to claim 1, characterized in that, The limiting structure includes multiple annular limiting bosses, each of which is axially spaced on the inner wall of the sleeve (1), and the inner annular wall of the annular limiting boss is used to cooperate with the pump shaft.

3. The mechanical oil seal installation device for the pump of the nuclear power plant steam-water separator reheater system according to claim 2, characterized in that, The diameter of the inner ring wall of one of the annular limiting bosses near the working surface (4) is larger than the diameter of the inner ring wall of the other annular limiting bosses.

4. The mechanical oil seal installation device for the pump of the nuclear power plant steam-water separator reheater system according to claim 3, characterized in that, The annular surface of one of the annular limiting bosses near the working surface (4) is flush with the working surface (4) on the side away from the other annular limiting bosses.

5. The mechanical oil seal installation device for a nuclear power plant steam-water separator reheater system pump according to claim 4, characterized in that, The inner ring wall of one of the annular limiting bosses near the working surface (4) includes a first cylindrical section and a first conical section. The first cylindrical section is connected to the end of the first conical section away from the working surface (4), and the first conical section gradually expands from the end connected to the first cylindrical section.

6. The mechanical oil seal installation device for a pump in a nuclear power plant steam-water separator reheater system according to any one of claims 1-5, characterized in that, An annular limiting stop (6) is provided on the inner wall of the sleeve (1) at the end away from the working surface (4). The annular limiting stop (6) is used to cooperate with the end face of the pump shaft to limit the axial travel of the sleeve (1).

7. The mechanical oil seal installation device for a pump in a nuclear power plant steam-water separator reheater system according to claim 6, characterized in that, The sleeve (1) is provided with a clearance hole (5) at the end away from the working surface (4) for avoiding the shaft end stud structure.

8. The mechanical oil seal installation device for a nuclear power plant steam-water separator reheater system pump according to claim 7, characterized in that, The wall of the clearance hole (5) includes a second cylindrical section and a second conical section. The second cylindrical section is connected to the end of the second conical section away from the working surface (4). The second conical section gradually expands from the end connected to the second cylindrical section.

9. The mechanical oil seal installation device for a pump in a nuclear power plant steam-water separator reheater system according to any one of claims 1-5, characterized in that, The working surface (4) is provided with a buffer structure.

10. The mechanical oil seal installation device for a pump in a nuclear power plant steam-water separator reheater system according to claim 9, characterized in that, The buffer structure is a flexible buffer pad.

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