Centering tool for mounting mechanical seal of air blower

Abstract

The utility model relates to the technical field of assembly tools, in particular to a centering tool for mounting a mechanical seal of an air blower, which comprises an inner sleeve and an outer sleeve, the inner sleeve can be sleeved outside a driving shaft in the air blower, and the outer sleeve can be embedded in an inner hole of an auxiliary oil tank in the air blower; the inner sleeve is provided with an outer conical surface and a first outer ring surface, the large-diameter end of the outer conical surface is connected with the first outer ring surface through an abutting surface, the abutting surface is perpendicular to the axial direction of the inner sleeve, and the diameter of the first outer ring surface is larger than that of the outer conical surface; an inner ring of the outer sleeve is provided with an inner conical face capable of being attached to the outer conical face, a second outer ring face is formed on an outer ring of the outer sleeve, and the first outer ring face, the second outer ring face and the inner hole are the same in diameter. A plurality of first screw holes penetrating through the abutting face are formed in the inner sleeve, the axial direction of the first screw holes is parallel to the axial direction of the inner sleeve, second screw holes in one-to-one correspondence with the first screw holes are formed in the outer sleeve, and tensioning bolts are installed between the first screw holes and the second screw holes.

Description

Technical Field

[0001] The utility model relates to the technical field of assembly tools, in particular to a centering tool for installing the mechanical seal of a blower. Background Art

[0002] During the operation of the blower, in order to prevent the conveyed gas medium from leaking to the outside through the shaft extension part of the auxiliary oil tank, a single-end mechanical seal in a cartridge type is generally installed at the inner hole of the shaft extension part. Since the installation accuracy of the mechanical seal affects the sealing effect of the blower and the service life of the mechanical seal. Therefore, before installing the mechanical seal, it is necessary to ensure that the circular runout of the inner hole of the auxiliary oil tank and the driving shaft is within the tolerance range.

[0003] In the related technical solutions, in order to ensure the tolerance after installing the mechanical seal: it is necessary to fix a dial indicator on the driving shaft before installing the mechanical seal, measure the circular runout value of the inner hole of the auxiliary oil tank relative to the driving shaft, and then continuously adjust the position of the auxiliary oil tank according to the runout value until it is adjusted within the tolerance range, and then fasten the auxiliary oil tank and install the mechanical seal. This installation process is time-consuming and laborious, and has high requirements for the measurement level and experience of the installation personnel. Summary of the Utility Model

[0004] The utility model provides a centering tool for installing the mechanical seal of a blower, which can solve at least one of the above technical problems.

[0005] To solve the above technical problems, one or more embodiments of the utility model provide a centering tool for installing the mechanical seal of a blower, including an inner sleeve and an outer sleeve. The inner sleeve can be sleeved outside the driving shaft in the blower, and the outer sleeve can be embedded in the inner hole of the auxiliary oil tank in the blower.

[0006] The inner sleeve has an outer conical surface and a first outer ring surface. One end with a larger diameter of the outer conical surface is connected to the first outer ring surface through a stop surface. The stop surface is perpendicular to the axial direction of the inner sleeve, and the diameter of the first outer ring surface is larger than that of the outer conical surface; the inner ring of the outer sleeve has an inner conical surface that can fit with the outer conical surface, and the outer ring of the outer sleeve forms a second outer ring surface. The first outer ring surface, the second outer ring surface and the inner hole have the same diameter.

[0007] A plurality of first screw holes passing through the stop surface are provided on the inner sleeve. The axial direction of the first screw holes is parallel to the axial direction of the inner sleeve. Second screw holes corresponding to the first screw holes one by one are provided on the outer sleeve, and a tensioning bolt is installed between the first screw holes and the second screw holes.

[0008] The beneficial effects of the above one or more technical solutions are as follows:

[0009] Compared with the prior art solution that requires using a dial indicator to measure the circular runout of the inner hole of the auxiliary oil tank and the driving shaft and continuously adjusting the position of the auxiliary oil tank until the circular runout meets the tolerance requirements, this solution can omit the process of measuring with a dial indicator and continuously adjusting the position of the auxiliary oil tank.

[0010] Specifically, in this solution, the inner sleeve can be coaxially sleeved outside the driving shaft, the outer sleeve can be coaxially embedded inside the inner hole of the auxiliary fuel tank, and the inner sleeve and the outer sleeve are connected by a tension bolt; the inner sleeve has an outer conical surface, and the outer sleeve has an inner conical surface that can fit with the inner sleeve. Furthermore, during the process of connecting the inner sleeve and the outer sleeve by the tension bolt in this solution, the centering function can be gradually realized by using the tension bolt, and the centering among the inner sleeve, the outer sleeve, the inner hole of the auxiliary fuel tank, and the driving shaft can be maintained in cooperation with the fitting of the inner conical surface and the outer conical surface, thereby providing a high position accuracy for the installation of the mechanical seal.

[0011] That is, this solution does not require repeated measurement with a dial indicator, nor does it require repeated adjustment of the auxiliary fuel tank. It can center the inner hole of the auxiliary fuel tank and the driving shaft at one time, saving time and effort and quickly realizing the precise alignment of the inner hole of the auxiliary fuel tank and the driving shaft. Description of the Drawings

[0012] Figure 1 Schematic diagram of installing a mechanical seal between the driving shaft and the auxiliary fuel tank in the prior art;

[0013] Figure 2 Schematic diagram of not installing a mechanical seal between the driving shaft and the auxiliary fuel tank in the prior art;

[0014] Figure 3 Cross-sectional view of the centering tooling in Embodiment 1 of the present utility model;

[0015] Figure 4 Cross-sectional view of the outer sleeve in Embodiment 1 of the present utility model;

[0016] Figure 5 Cross-sectional view of the inner sleeve in Embodiment 1 of the present utility model;

[0017] Figure 6 Schematic diagram of installing the centering tooling on the blower in Embodiment 1 of the present utility model;

[0018] Figure 7 Schematic diagram of installing the centering tooling on the blower in Embodiment 2 of the present utility model.

[0019] Reference numerals: 10, auxiliary fuel tank; 11, inner hole; 20, mechanical seal; 30, driving shaft; 40, centering tooling; 50, sleeve; 41, outer sleeve; 42, inner sleeve; 43, tension bolt; 411, second outer ring surface; 412, first screw hole; 413, tapered hole; 414, inner conical surface; 421, outer conical surface; 422, first outer ring surface; 423, second screw hole; 424, inner ring surface; 425, mounting hole. Detailed Embodiment

[0020] To clearly illustrate the technical features of this solution, the following will elaborate on the present utility model in detail through specific embodiments and in conjunction with its attached drawings.

[0021] Embodiment 1

[0022] Refer to Figure 1 - Figure 2 , which shows a partial structural cross-sectional view of the blower. Specifically, the auxiliary fuel tank 10 of the blower has an inner hole 11 that penetrates the side wall of the auxiliary fuel tank 10, enabling the main shaft 30 to extend outward from the inner hole 11 of the auxiliary fuel tank 10. Here, the inner diameter of the inner hole 11 is larger than the outer diameter of the main shaft 30, forming an annular gap therebetween. To achieve the sealing of the main shaft 30 at the position of the inner hole 11 and prevent the oil in the auxiliary fuel tank 10 from leaking outward along the inner hole 11 or the main shaft 30, a mechanical seal 20 is installed between the inner hole 11 and the main shaft 30. The sealing effect of this mechanical seal 20 is subject to the positional accuracy between the main shaft 30 and the inner hole 11. Therefore, when installing the blower, it is necessary to adjust the coaxiality of the main shaft 30 and the inner hole 11 in advance to meet the tolerance requirements, and then fix the auxiliary fuel tank 10.

[0023] Refer to Figure 3 - Figure 6 , this embodiment provides a centering tooling for installing the mechanical seal of the blower, including an inner sleeve 42 and an outer sleeve 41. The inner sleeve 42 can be sleeved outside the main shaft 30 in the blower, and the outer sleeve 41 can be embedded in the inner hole 11 of the auxiliary fuel tank 10 in the blower.

[0024] The inner sleeve 42 has an outer conical surface 421 and a first outer ring surface 422. One end with a larger diameter of the outer conical surface 421 is connected to the first outer ring surface 422 through a stop surface, and the stop surface is perpendicular to the axis of the inner sleeve 42. The diameter of the first outer ring surface 422 is larger than that of the outer conical surface 421; the inner ring of the outer sleeve 41 has an inner conical surface 414 that can fit with the outer conical surface 421, and the outer ring of the outer sleeve 41 forms a second outer ring surface 411. The first outer ring surface 422, the second outer ring surface 411, and the inner hole 11 have the same diameter. A plurality of first screw holes 412 passing through the stop surface are provided on the inner sleeve 42, and the axial direction of the first screw holes 412 is parallel to the axis of the inner sleeve 42. Second screw holes 423 corresponding to the first screw holes 412 one by one are provided on the outer sleeve 41, and a tensioning bolt 43 is installed between the first screw holes 412 and the second screw holes 423.

[0025] Specifically, the inner ring surface 424 of the inner sleeve 42 has the same size as the outer ring surface of the main shaft 30. After the inner sleeve 42 is sleeved on the main shaft 30, the inner sleeve 42 and the main shaft 30 are coaxially arranged. Similarly, the size of the second outer ring surface 411 is the same as that of the inner hole 11 of the auxiliary fuel tank 10. After the outer sleeve 41 is embedded in the inner hole 11, the outer sleeve 41 and the inner hole 11 of the auxiliary fuel tank 10 are coaxially arranged. At this time, only by adjusting the inner sleeve 42 and the outer sleeve 41 to be coaxial, the main shaft 30 and the inner hole 11 of the auxiliary fuel tank 10 are coaxially arranged.

[0026] In this embodiment, for the outer sleeve 41, it has a tapered hole 413, and the surface of the tapered hole 413 forms an inner tapered surface 414. For the inner sleeve 42, only the part with the outer tapered surface 421 is nested in the tapered hole 413. The inner sleeve 42 has a mounting hole 425, and the side surface of the mounting hole 425 is the inner ring surface 424 of the inner sleeve 42. The driving shaft 30 penetrates into the mounting hole 425, and the outer circular surface of the driving shaft 30 is in contact with the inner ring surface 424 of the inner sleeve 42.

[0027] Specifically, the inner sleeve 42 has a first end face and a second end face. The first end face of the inner sleeve 42 is connected to the end with the smaller diameter of the outer tapered surface 421, and the second end face can be connected to the first outer ring surface 422.

[0028] In this embodiment, the first screw holes 412 are uniformly distributed along the circumferential direction of the inner sleeve 42, the second screw holes 423 are uniformly distributed along the circumferential direction of the outer sleeve 41, and the number of the first screw holes 412 is not less than three.

[0029] As a specific structural form, the number of both the first screw holes 412 and the second screw holes 423 is three. In some other structural settings, the number of the first screw holes 412 and the second screw holes 423 can be four or five or other numbers, which can be set by those skilled in the art themselves.

[0030] In this embodiment, the first screw holes 412 penetrate through the inner sleeve 42, the first screw holes 412 are through holes, the second screw holes 423 are blind holes, and the second screw holes 423 penetrate through the end face of the outer sleeve 41 facing the abutting surface.

[0031] Specifically, both the through hole and the blind hole here are smooth holes, that is, neither the first screw holes 412 nor the second screw holes 423 have internal threads.

[0032] In this embodiment, the tensioning bolt 43 includes a screw rod and a rod sleeve, and the rod sleeve is coaxially embedded in the first screw holes 412 and the second screw holes 423.

[0033] It can be known that when the screw rod is loosened, the screw rod and the rod sleeve will not maintain a high coaxiality, and at this time, the coaxiality between the rod sleeve and the first screw holes 412 and the second screw holes 423 is also poor. During the process of tightening the tensioning bolt 43, the screw rod moves into the rod sleeve, the screw rod presses the rod sleeve, and the rod sleeve bulges outwards. During the process of tightening the screw rod into the rod sleeve, the coaxiality tolerance between the screw rod and the rod sleeve gradually meets the requirements, and the coaxiality tolerance between the inner sleeve 42 and the outer sleeve 41 also gradually meets the requirements.

[0034] In this embodiment, the diameter of the small end of the outer tapered surface 421 is equal to the diameter of the small end of the inner tapered surface 414, and the diameter of the large end of the outer tapered surface 421 is greater than the diameter of the large end of the inner tapered surface 414.

[0035] Working principle: When in use, first sleeved the inner sleeve 42 outside the driving shaft 30, and nested the outside part in the inner hole 11 of the auxiliary fuel tank 10. Then, preliminarily align the first screw hole 412 of the inner sleeve 42 and the second screw hole 423 of the outer sleeve 41 and insert the rod sleeve of the tensioning bolt 43. Pass the screw rod of the tensioning bolt 43 through the rod sleeve and gradually tighten it. When the rod sleeve of the tensioning bolt 43 is gradually tightened, the first screw hole 412 and the second screw hole 423 are aligned, and the coaxiality of the two meets the requirements.

[0036] During the process of tightening the tensioning bolt 43, the outer conical surface 421 of the inner sleeve 42 and the inner conical surface 414 of the outer sleeve 41 gradually come into contact, and finally the inner conical surface 414 and the outer conical surface 421 are completely fitted. The coaxiality of the inner sleeve 42 and the outer sleeve 41 meets the requirements, and the coaxiality of the driving shaft 30 and the inner hole 11 of the auxiliary fuel tank 10 also meets the requirements. Install and fix the auxiliary fuel tank 10, then remove the positioning tooling 40, and the installation of the mechanical seal can be carried out.

[0037] Embodiment 2

[0038] See Figure 7 , this embodiment also provides a centering tooling for the installation of the mechanical seal of a blower. The difference from Embodiment 1 is that

[0039] In this embodiment, it further includes a stop member fixed at the end face of the inner sleeve 42. The stop member is close to the end with a smaller diameter of the outer conical surface 421, and the stop member can abut against the stepped surface of the driving shaft 30.

[0040] In this embodiment, the stop member is a sleeve 50. The outer diameter of the sleeve 50 is smaller than the small end diameter of the outer conical surface 421, and the inner diameter of the sleeve 50 is larger than the inner diameter of the inner sleeve 42. Specifically, a plurality of hollow holes are provided on the sleeve 50. The hollow holes are used to reduce the weight of the sleeve 50. Preferably, the hollow holes here can be circular holes or square holes and other different shapes.

[0041] In the case of using the stop member, during the process of sleeving the inner sleeve 42 on the driving shaft 30, the stop member abuts against the stepped shaft of the driving shaft 30 to achieve positioning.

[0042] In some other structural settings, the stop member can be a plurality of stop rods, and the plurality of stop rods are evenly distributed along the circumferential direction of the inner sleeve.

[0043] The above specific implementation manners cannot be used as a limitation to the protection scope of the present invention. For those skilled in the art of this technology, any alternative improvement or transformation made to the implementation manner of the present invention falls within the protection scope of the present invention.

[0044] Where the present invention is not described in detail, it is the common knowledge of those skilled in the art of this technology.

Claims

1. A centering tooling for installing a mechanical seal of a blower, characterized in that, It includes an inner sleeve and an outer sleeve. The inner sleeve can be sleeved outside the driving shaft in the blower, and the outer sleeve can be embedded in the inner hole of the auxiliary fuel tank in the blower. The inner sleeve has an outer conical surface and a first outer ring surface. One end with a larger diameter of the outer conical surface is connected to the first outer ring surface through a stop surface, and the stop surface is perpendicular to the axial direction of the inner sleeve. The diameter of the first outer ring surface is larger than that of the outer conical surface. The inner ring of the outer sleeve has an inner conical surface that can fit with the outer conical surface, and the outer ring of the outer sleeve forms a second outer ring surface. The first outer ring surface, the second outer ring surface, and the inner hole have the same diameter. A plurality of first screw holes passing through the stop surface are provided on the inner sleeve. The axial direction of the first screw holes is parallel to the axial direction of the inner sleeve. Second screw holes corresponding to the first screw holes one by one are provided on the outer sleeve, and a tensioning bolt is installed between the first screw holes and the second screw holes.

2. The centering tooling for installing the blower mechanical seal according to claim 1, wherein, The first screw holes are evenly distributed along the circumferential direction of the inner sleeve, the second screw holes are evenly distributed along the circumferential direction of the outer sleeve, and the number of the first screw holes is not less than three.

3. The centering tooling for installing the blower mechanical seal according to claim 1, characterized in that, The first screw holes penetrate through the inner sleeve, the second screw holes are blind holes, and the second screw holes penetrate through the end face of the outer sleeve facing the stop surface.

4. The centering tooling for installing the mechanical seal of the blower according to claim 1, wherein, The tensioning bolt includes a screw rod and a rod sleeve, and the rod sleeve is coaxially embedded in the first screw holes and the second screw holes.

5. The centering tooling for installing the blower mechanical seal according to claim 1, characterized in that, The diameter of the small end of the outer conical surface is equal to the diameter of the small end of the inner conical surface, and the diameter of the large end of the outer conical surface is larger than the diameter of the large end of the inner conical surface.

6. The centering tooling for installing the blower mechanical seal according to claim 1, characterized in that, It further includes a stop member fixed at the end face of the inner sleeve. The stop member is close to the end with a smaller diameter of the outer conical surface, and the stop member can be in abutment with the step surface of the driving shaft.

7. The centering tooling for installing the blower mechanical seal according to claim 6, characterized in that, The stop member is a sleeve, the outer diameter of the sleeve is smaller than the diameter of the small end of the outer conical surface, and the inner diameter of the sleeve is larger than the inner diameter of the inner sleeve.

8. The centering tooling for installing the blower mechanical seal according to claim 7, characterized in that, A plurality of hollow holes are provided on the sleeve.

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