Assembly tool and method for box-type mechanical seal

Abstract

The present invention belongs to the technical field of rotating equipment assembly, and specifically relates to an assembly tool and method for a box-type mechanical seal, which can completely avoid the risk of friction failure of dynamic and static rings during the assembly of the box-type mechanical seal, while ensuring the assembly quality and efficiency of the box-type mechanical seal. The present invention avoids the risk of friction failure of dynamic and static rings during the assembly of the box-type mechanical seal; according to the structural characteristics of the box-type mechanical seal, the separate assembly of dynamic and static ring components is avoided, and the work quality and efficiency of the assembly are improved.

Description

Technical Field

[0001] The invention belongs to the technical field of rotating equipment assembly, and in particular relates to an assembly tool and method for a box-mounted mechanical seal. Background Art

[0002] Mechanical sealing components rely on maintaining a sealing liquid film with a micron-level thickness on the end faces of dynamic and static sealing rings to achieve the axial sealing function of rotating machinery.

[0003] The dynamic and static sealing rings are the core functional components of mechanical seals, and their circumferential positioning is achieved by means of anti-rotation pins installed on their respective components.

[0004] In order to avoid relative movement of the moving and static ring surfaces due to adjustment of the moving and static rings during the mechanical seal assembly process, which may cause damage to the sealing surface, the traditional mechanical seal assembly process installs the moving and static ring components separately. This method is not suitable for boxed mechanical seals in which the moving and static ring components are assembled together.

[0005] Therefore, in order to avoid the risk of friction failure of the dynamic and static rings during the assembly of the box-type mechanical seal and improve the assembly quality and efficiency of the box-type mechanical seal, it is urgent to invent a tool and method to solve the above problems. Summary of the invention

[0006] The purpose of the present invention is to address the above-mentioned defects in the prior art and to provide an assembly tool and method for a box-type mechanical seal. The use of the tool and method can completely avoid the risk of friction failure of the dynamic and static rings during the assembly of the box-type mechanical seal, while ensuring the assembly quality and efficiency of the box-type mechanical seal.

[0007] The technical solution of the present invention is as follows:

[0008] A tool for assembling a box-type mechanical seal, comprising a lifting mechanism, a star-shaped disk A, a star-shaped disk B, four screws A, four screws B, four special-shaped bolts, four support rods, four springs, an outer ring, an inner ring, a mechanical seal static ring assembly, a mechanical seal dynamic ring assembly, and a mechanical seal chamber; the mechanical seal static ring assembly is arranged in the mechanical seal chamber;

[0009] The adapter ring assembly includes an inner adapter ring, an outer adapter ring, and a support rod assembly;

[0010] The outer connecting ring is connected to the mechanical seal static ring assembly by bolts and is linked to the star plate A; the inner connecting ring is connected to the mechanical seal dynamic ring assembly by bolts and is linked to the star plate B; the star plate A and the star plate B are assembled on the rotation mechanism through the inner hole with T-shaped threads; the star plate A and the star plate B realize the up and down movement of the mechanical seal dynamic and static components by rotating the rotation mechanism;

[0011] The support rod is fixed to the outer ring by means of special-shaped bolts, and a spring is installed inside the special-shaped bolts to maintain the position of the support rod, thereby forming a support rod assembly;

[0012] The outer connecting ring is connected to the mechanical seal stationary ring assembly through bolts, and is connected to the star-shaped disk A through four screws A evenly arranged around a circle.

[0013] The inner ring is connected to the mechanical seal moving ring assembly through bolts, and is connected to the star-shaped disk B through four screws B evenly arranged around a circle.

[0014] There are 4 groups of support rod assemblies, which are evenly arranged along a circumference of the outer ring. The axial position of the mechanical seal stationary ring assembly is maintained by adjusting the positions of the 4 groups of support rod assemblies at the same time.

[0015] The star-shaped disk A2 is arranged above the star-shaped disk B3.

[0016] The lifting mechanism is provided with a hand wheel and a screw rod processed with a T-shaped thread, and a star-shaped disc A and a star-shaped disc B are installed on the screw rod.

[0017] The special-shaped bolt cooperates with the support rod to adjust the position within the range of the support rod 790, so that the dynamic and static ring surfaces are separated by 3-5mm during the assembly process of the box-type mechanical seal.

[0018] The outer connecting ring and the inner connecting ring respectively provide tooling connection interfaces for the dynamic and static ring components of the mechanical seal, the star disk A2 and the star disk B3.

[0019] A large torque transmission device for a turning tool of a rotating equipment, step 1, installing a screw to connect a mechanical seal assembly and a star-shaped plate, adjusting the positions of four support rods; rotating a hand wheel of a rotary lifting mechanism, so that the boxed mechanical seal assembly moves down and sits on the mechanical seal chamber through the support rod;

[0020] Step 2: Remove the screw between the mechanical seal assembly and the star disk; install the screw between the inner ring and the star disk B3;

[0021] Step 3: Rotate the hand wheel to move the mechanical code moving ring assembly downward so that the end faces of the mechanical seal moving and static rings are 3-5mm apart; adjust and seat the mechanical seal moving ring assembly according to its circumferential position;

[0022] Step 4: Install screw A and rotate the hand wheel of the lifting mechanism to separate the mechanical seal stationary ring assembly and the support rod from the mechanical seal chamber;

[0023] Step 5: Rotate the four support rods 790° in sequence;

[0024] Step six, rotate the hand wheel of the lifting mechanism, slowly lower the mechanical seal static ring assembly, and position the mechanical seal static ring assembly according to the position of the mechanical seal static ring assembly and the mechanical seal chamber, and the installation is completed.

[0025] The beneficial effects of the present invention are:

[0026] 1Avoid the risk of friction failure of the dynamic and static rings during the assembly of box-type mechanical seals;

[0027] 2. According to the structural characteristics of the box-type mechanical seal, the separate assembly of the dynamic and static ring components is avoided, and the assembly work quality and efficiency are improved;

[0028] 3. Simple structure and easy installation.

[0029] 4 The present invention has reference significance for the design of assembly tooling for containerized dynamic and static components of other types of rotating equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a structural schematic diagram of a tooling for assembling a box-type mechanical seal according to the present invention;

[0031] Figure 2 The present invention is a schematic diagram of the use of a tool for assembling a box-type mechanical seal.

[0032] Figure 3 It is a schematic diagram of the rotating lifting mechanism assembly of the present invention.

[0033] Figure 4 It is a schematic diagram of the adapter ring assembly of the present invention.

[0034] Figure 5 It is a schematic diagram of a special-shaped bolt of the present invention.

[0035] Figure 6 It is a schematic diagram of the support rod of the present invention.

[0036] In the figure: 1. lifting mechanism, 2. star disk A, 3. star disk B, 4. screw A, 5. screw B, 6. special-shaped bolts, 7. support rod, 8. spring, 9. external connecting ring, 10. internal connecting ring, 11. mechanical seal static ring assembly, 12. mechanical seal dynamic ring assembly, 13. mechanical seal chamber. DETAILED DESCRIPTION

[0037] The present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0038] As shown in the figure, a tool for assembling a box-type mechanical seal of the present invention includes a lifting mechanism 1, a star-shaped disk A2, a star-shaped disk B3, 4 screws A4, 4 screws B5, 4 special-shaped bolts 6, 4 support rods 7, 4 springs 8, an outer ring 9, an inner ring 10, a mechanical seal static ring assembly 11, a mechanical seal dynamic ring assembly 12, and a mechanical seal chamber 13;

[0039] The mechanical seal stationary ring assembly 11 is arranged in the mechanical seal chamber 13;

[0040] The adapter ring assembly includes an inner adapter ring 10, an outer adapter ring 9, and a support rod assembly;

[0041] The outer connecting ring 9 is connected to the mechanical seal static ring assembly 11 by bolts, and is connected to the star disk A2 by four screws A4 evenly arranged around a circle; the inner connecting ring 10 is connected to the mechanical seal dynamic ring assembly 12 by bolts, and is connected to the star disk B3 by four screws B5 evenly arranged around a circle; the star disk A2 and the star disk B3 are assembled on the rotation mechanism 1 through the inner hole with T-shaped threads; the star disk A2 is arranged above the star disk B3, and the star disk A2 and the star disk B3 realize the up and down movement of the mechanical seal dynamic and static assembly 11 by rotating the rotation mechanism 1;

[0042] The support rod 7 is fixed to the outer ring 9 by means of a special-shaped bolt 6, and a spring 8 is installed inside the special-shaped bolt 6 to maintain the position of the support rod 7, forming a support rod assembly; there are 4 groups of support rod assemblies, which are evenly arranged along the outer ring 9. By adjusting the positions of the 4 groups of support rod assemblies at the same time, the axial position maintenance function of the mechanical seal static ring assembly 11 is achieved;

[0043] The dynamic and static ring assemblies are independent of each other, and rely on the holding function of the support rod assembly to achieve mutual separation of the dynamic ring end faces during the assembly of the box-mounted mechanical seal, thereby avoiding the risk of friction failure of the dynamic and static rings.

[0044] The lifting mechanism 1 has a hand wheel and a screw rod with a T-shaped thread, and the star disk A2 and the star disk B3 are installed on the screw rod. Rotating the first wheel can realize the up and down movement of the star disk A2 and the star disk B3 and their connecting components.

[0045] The special-shaped bolt 6 cooperates with the support rod 7 to adjust the position of the support rod 790, so that the dynamic and static ring surfaces are separated by 3-5mm during the assembly of the box-type mechanical seal.

[0046] The outer ring 9 and the inner ring 10 respectively provide tooling connection interfaces for the dynamic and static ring assembly of the mechanical seal, the star disk A2 and the star disk B3, ensuring that the dynamic and static ring assemblies can rotate independently of each other and realizing the adjustment of the circumferential positioning position of the dynamic and static ring assembly and the rotating machinery.

[0047] An assembly method for a box-type mechanical seal comprises the following steps:

[0048] Step 1: Install the screw 4 to connect the mechanical seal assembly and the star plate 2, and adjust the positions of the four support rods 7; turn the hand wheel of the lifting mechanism 1 to move the boxed mechanical seal assembly downward and seat it on the mechanical seal chamber 13 through the support rods 7.

[0049] Step 2: Remove the screw 4 between the mechanical seal assembly and the star disk 2; and install the screw between the inner ring 10 and the star disk B3.

[0050] Step 3: Turn the hand wheel to move the mechanical code moving ring assembly downward so that the end faces of the mechanical seal moving and static rings are disengaged by 3-5mm; adjust and seat according to the circumferential position of the mechanical seal moving ring assembly.

[0051] Step 4: Install the screw A4 and rotate the hand wheel of the lifting mechanism 1 to separate the mechanical seal stationary ring assembly 11 and the support rod 7 from the mechanical seal chamber 13;

[0052] Step 5: Rotate the four support rods 790° in sequence;

[0053] Step 6: Rotate the hand wheel of the lifting mechanism 1 to slowly lower the mechanical seal stationary ring assembly 11, and position the mechanical seal stationary ring assembly 11 according to the position of the mechanical seal stationary ring assembly 11 and the mechanical seal chamber 13. The installation is completed.

Claims

1. An assembly tool for a box-type mechanical seal, comprising a lifting mechanism, a star-shaped disk A, a star-shaped disk B, 4 screws A, 4 screws B, 4 special-shaped bolts, 4 support rods, 4 springs, an outer ring, an inner ring, a mechanical seal static ring assembly, a mechanical seal dynamic ring assembly, and a mechanical seal chamber; characterized in that: The mechanical seal static ring assembly is arranged in the mechanical seal chamber; The adapter ring assembly includes an inner adapter ring, an outer adapter ring, and a support rod assembly; The outer connecting ring is connected to the mechanical seal static ring assembly by bolts and is linked to the star plate A; the inner connecting ring is connected to the mechanical seal dynamic ring assembly by bolts and is linked to the star plate B; the star plate A and the star plate B are assembled on the rotation mechanism through the inner hole with T-shaped threads; the star plate A and the star plate B realize the up and down movement of the mechanical seal dynamic and static components by rotating the rotation mechanism; The support rod is fixed to the outer ring by means of special-shaped bolts, and a spring is installed inside the special-shaped bolts to maintain the position of the support rod, thereby forming a support rod assembly; There are 4 groups of support rod assemblies, which are evenly arranged along a circle of the outer ring. By adjusting the positions of the 4 groups of support rod assemblies at the same time, the axial position of the mechanical seal stationary ring assembly can be maintained.

2. An assembly tool for a box-type mechanical seal according to claim 1, characterized in that: The outer connecting ring is connected to the mechanical seal stationary ring assembly through bolts, and is connected to the star-shaped disk A through four screws A evenly arranged around a circle.

3. An assembly tool for a box-type mechanical seal according to claim 1, characterized in that: The inner ring is connected to the mechanical seal moving ring assembly through bolts, and is connected to the star-shaped disk B through four screws B evenly arranged around a circle.

4. An assembly tool for a box-type mechanical seal according to claim 1, characterized in that: The star-shaped disk A is arranged above the star-shaped disk B.

5. The assembly tool for a box-type mechanical seal according to claim 1, characterized in that: The lifting mechanism is provided with a hand wheel and a screw rod processed with a T-shaped thread, and a star-shaped disc A and a star-shaped disc B are installed on the screw rod.

6. An assembly tool for a box-type mechanical seal according to claim 1, characterized in that: The special-shaped bolt cooperates with the support rod to adjust the position of the support rod within a range of 90 degrees, so that the dynamic and static ring surfaces are separated by 3-5 mm during the assembly process of the box-type mechanical seal.

7. An assembly tool for a box-type mechanical seal according to claim 1, characterized in that: The outer connecting ring and the inner connecting ring respectively provide tooling connection interfaces for the dynamic and static ring components of the mechanical seal, the star disk A and the star disk B.

8. An assembly method for an assembly tool for a box-type mechanical seal according to claim 1, characterized in that: Step 1: Install screw rod A to connect the mechanical seal assembly and star plate B, and adjust the positions of the four support rods; turn the hand wheel of the lifting mechanism to move the boxed mechanical seal assembly downward and seat it on the mechanical seal chamber through the support rods; Step 2: Remove the screw A between the mechanical seal assembly and the star disk B; install the screw between the inner ring and the star disk B; Step 3: Rotate the hand wheel to move the mechanical seal moving ring assembly downward so that the end faces of the mechanical seal moving and static rings are 3-5 mm apart; adjust and seat the mechanical seal moving ring assembly according to the circumferential position; Step 4: Install screw A and rotate the hand wheel of the lifting mechanism to separate the mechanical seal stationary ring assembly and the support rod from the mechanical seal chamber; Step 5: Rotate the four support rods 90 degrees in sequence; Step six, rotate the hand wheel of the lifting mechanism, slowly lower the mechanical seal static ring assembly, and position the mechanical seal static ring assembly according to the position of the mechanical seal static ring assembly and the mechanical seal chamber, and the installation is completed.

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