Auxiliary device for sealing groove profile machining

Abstract

The utility model relates to an auxiliary device for machining a sealing groove profile, which comprises a groove profile machining auxiliary disc used for being fixed on groove profile machining equipment, the groove profile machining auxiliary disc is provided with a step groove, and the step groove is used for positioning a ring to be machined; the fixing part is used for fixing the groove type machining auxiliary disc on groove type machining equipment; the step groove comprises a step end face which is used for being in contact with a non-machining end face of a to-be-machined ring and axially positioning the to-be-machined ring. The positioning end face is used for being in contact with an inner ring of the to-be-machined ring and radially positioning the to-be-machined ring; when the groove profile is machined, the to-be-machined ring is fixed in the step groove, so that the to-be-machined ring is positioned in the axial direction and the radial direction, then the groove profile is conveniently machined, and due to the fact that the to-be-machined ring is positioned in the machining process, the machining efficiency and the machining precision are high.

Description

Technical Field

[0001] The utility model relates to the technical field of sealing ring processing, in particular to an auxiliary device for sealing groove processing. Background Art

[0002] Dry gas seal is a new type of shaft end seal that uses slotted sealing technology for gas sealing. It is a non-contact seal. Dry gas seals are different from general lubricating mechanical seals. Dry gas seals produce a stable gas film on the two sealing surfaces. Domestic seal manufacturers and related research institutions have developed a series of dry gas seals for compressors, fans, centrifugal pumps, etc., which have been widely used.

[0003] The dynamic pressure groove on the dry gas seal ring is the core technology of dry gas seals, and its processing quality determines the performance of the product. In the process of developing dry gas seal products, how to make grooves on the seal ring is one of the biggest problems encountered. Utility Model Content

[0004] In order to solve the problem that dynamic pressure grooves are difficult to process, the present application provides an auxiliary device for sealing groove processing.

[0005] The above-mentioned invention object of the utility model is achieved through the following technical scheme: an auxiliary device for sealing groove processing, comprising:

[0006] A groove processing auxiliary disk, used to be fixed on the groove processing equipment, the groove processing auxiliary disk has a step groove, and the step groove is used to position the ring to be processed;

[0007] A fixing part, used for fixing the groove processing auxiliary disk on the groove processing equipment;

[0008] The step groove comprises:

[0009] The stepped end surface is used to contact the non-machined end surface of the ring to be machined to axially position the ring to be machined; and

[0010] The positioning end face is used to contact the inner ring of the ring to be processed and to perform radial positioning on the ring to be processed.

[0011] Preferably, a positioning piece is provided on the positioning end face, the positioning piece is used to radially position the ring to be processed, the positioning piece is located between the positioning end face and the inner ring of the ring to be processed, and the distance between the positioning piece and the contact side of the ring to be processed and the positioning end face is adjustable.

[0012] Preferably, the positioning end surface is an annular surface, the positioning member is annular, and the positioning member is sleeved on the positioning end surface.

[0013] Preferably, the surface where the positioning end surface is located is perpendicular to the surface where the step end surface is located.

[0014] Preferably, the positioning member comprises a centering O-ring, and the centering O-ring is sleeved on the positioning end surface.

[0015] Preferably, a groove is provided on the positioning end face, the centering O-ring is sleeved in the groove, the difference between the radius of the outer ring and the inner ring of the positioning O-ring is the thickness of the positioning O-ring, and the depth of the groove is greater than 1 / 2 of the thickness of the positioning O-ring and less than the thickness of the positioning O-ring.

[0016] Preferably, the groove-type machining auxiliary disk is provided with a plurality of step grooves, the step grooves are annular, and the diameters of the plurality of step grooves gradually increase / decrease.

[0017] Preferably, the fixing portion comprises a positioning hole located on the groove-shaped machining auxiliary disk.

[0018] Preferably, the positioning hole extends along the central axis direction of the annular structure surrounded by the step groove, and a positioning O-ring is arranged in the positioning hole.

[0019] Preferably, the groove-type machining auxiliary disk is provided with deweighting holes.

[0020] In summary, the present invention includes at least one of the following beneficial technical effects:

[0021] 1. When machining the groove, the ring to be machined is fixed in the step groove, so that the ring to be machined is positioned in both the axial and radial directions, thereby facilitating the machining of the groove. In addition, since the ring to be machined is positioned during machining, the machining efficiency and machining accuracy are high;

[0022] 2. The centering O-ring can be used to quickly radially position the ring to be processed. When positioning, the processing ring is pressed into the step groove. At this time, the centering O-ring is deformed. The centering O-ring will be supported between the positioning end face and the processing ring, so that the ring to be processed can be quickly positioned, which is convenient for fixing and disassembling the processing ring and improving processing efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the structure of this embodiment.

[0024] Figure 2 yes Figure 1 A partial enlarged schematic diagram of part A.

[0025] Figure 3 It is a top view of this embodiment.

[0026] Figure 4 It is a partial view of the positioning O-ring in this embodiment.

[0027] In the figure, 1, groove-type processing auxiliary disk; 2, step groove; 21, step end face; 22, positioning end face; 3, positioning hole; 4, positioning piece; 41, centering O-ring; 41a, inferior arc part; 5, groove; 6, ring to be processed; 61, non-processed end face; 62, processed end face; 7, positioning O-ring; 8, deweighting hole; 9, groove-type processing equipment; 10, positioning shaft; 11, positioning groove; 12, positioning spring; 13, abutment table. DETAILED DESCRIPTION

[0028] The utility model is further described in detail below in conjunction with the accompanying drawings.

[0029] Reference Figure 1 , 2 , is an auxiliary device for sealing groove processing disclosed by the utility model, including a groove processing auxiliary disk 1, the overall shape structure of the groove processing auxiliary disk 1 is a truncated cone shape, the diameter of the groove processing auxiliary disk 1 gradually increases from top to bottom, and a step groove 2 is opened along the circumference of the groove processing auxiliary disk 1, the step groove 2 is annular, and a plurality of step grooves 2 are arranged on the groove processing auxiliary disk 1 from top to bottom, and the diameters of the plurality of step grooves 2 gradually increase from top to bottom.

[0030] During processing, the ring 6 to be processed can be positioned by being sleeved in the step groove 2, so as to facilitate subsequent processing. When the ring 6 to be processed is placed in the step groove 2, the non-processed end face 61 of the ring 6 to be processed is facing downward, and the processed end face 62 of the ring 6 to be processed is facing upward, so that the processed end face 62 of the ring 6 to be processed can be conveniently processed by the groove processing equipment 9. The step groove 2 is the depth of the step groove 2 along the up-down direction. In order to facilitate processing, the depth of the step groove 2 is set to be less than the thickness of the ring 6 to be processed (i.e., the distance from the non-processed end face 61 to the processed end face 62).

[0031] Reference Figure 1 , 2 , wherein the step groove 2 includes a step end face 21 and a positioning end face 22, the step end face 21 is horizontally arranged, and the positioning end face 22 is an annular surface surrounding the step end face 21. In this embodiment, the step end face 21 is an annular surface, and the surface where the step end face 21 is located is perpendicular to the surface where the positioning end face 22 is located, and the step groove 2 is surrounded by the step end face 21 and the positioning end face 22. In order to facilitate the placement of the ring 6 to be processed with the same inner diameter but different outer diameters, the outer peripheral side of the step groove 2 is set to be open, that is, the positioning end face 22 is used to fit with the inner ring of the ring 6 to be processed, and the step end face 21 is used to fit with the non-processed end face 61 of the ring 6 to be processed, and the height of the positioning end face 22 is the depth of the step groove 2.

[0032] During use, the ring 6 to be processed is sleeved on the ring formed by the positioning end face 22. At this time, the positioning end face 22 radially positions the ring 6 to be processed, and the step end face 21 fits with the non-processed end face 61 of the processing ring, so that the ring 6 to be processed can be axially positioned. By placing different rings 6 to be processed in different step grooves 2 according to their different inner diameters, the rings 6 to be processed with different inner diameters can be positioned, and the operation is simple and convenient.

[0033] Reference Figure 1 , 2 In order to accurately radially position the ring 6 to be processed, it is necessary to make the accuracy between the positioning end face 22 and the inner ring of the ring 6 to be processed very high, which will increase the difficulty of the subsequent operation when installing the ring 6 to be processed into the step groove 2. Because the positioning end face 22 is in contact with the inner ring of the ring 6 to be processed, the ring 6 to be processed needs to be kept in a very horizontal state during installation, otherwise it is easy for the ring 6 to be processed to be stuck on the positioning end face 22 and unable to enter the step groove 2. At the same time, due to the problem of processing accuracy, it cannot be guaranteed that each ring 6 to be processed can be installed into the step groove 2. For this reason, a clearance fit is set between the inner ring of the ring 6 to be processed and the positioning end face 22, so that the two maintain a certain gap, so that they can be quickly and conveniently inserted.

[0034] In order to avoid the problem of low radial positioning accuracy of the ring 6 to be processed due to the gap between the positioning end face 22 and the ring 6 to be processed, a positioning member 4 is arranged between the positioning end face 22 and the ring 6 to be processed, and the positioning member 4 is installed on the positioning end face 22. The positioning member 4 includes a centering O-ring 41. A groove 5 is opened on the positioning end face 22. The centering O-ring 41 is installed in the groove 5. The difference between the radius of the outer ring and the inner ring of the positioning O-ring 7 is the thickness of the positioning O-ring 7. In order to make the centering O-ring 41 have a better centering effect, the depth of the groove 5 is set to be greater than 1 / 2 of the thickness of the positioning O-ring 7 and less than the thickness of the positioning O-ring 7. At this time, it can be ensured that the positioning O-ring 7 just protrudes out of the groove 5.

[0035] Reference Figure 1 , 2 In this embodiment, the cross section of the positioning O-ring 7 is circular, that is, the positioning O-ring 7 is a ring formed by a cylindrical elastic material, which can ensure that the part protruding from the groove 5 forms a minor arc surface 41a. In this way, when the ring 6 to be processed is installed into the step groove 2, the minor arc surface 41a formed by the positioning O-ring 7 through the part of the protruding groove 5 can guide the ring 6 to be processed into the step groove 2, thereby avoiding the situation where the positioning O-ring 7 is damaged when the ring 6 to be processed contacts with the positioning O-ring 7; when the ring 6 to be processed is placed into the step groove 2, the inner ring part of the ring 6 to be processed will gradually approach the minor arc surface 41a until it contacts the minor arc part 41a. At this time, the minor arc surface 41a is an arc surface from left to right and from top to bottom, thereby being able to guide the ring 6 to be processed to quickly enter the step groove 2.

[0036] When the ring 6 to be processed is installed into the step groove 2, the positioning O-ring 7 will be located between the positioning end face 22 and the inner ring of the ring 6 to be processed, and the positioning O-ring 7 provides circumferential support force to the ring 6 to be processed along the circumference of the positioning end face 22, so that the ring 6 to be processed is exactly positioned at the center position, ensuring the radial positioning accuracy of the ring 6 to be processed. Through such a design, it can ensure convenient and fast installation while providing better radial positioning accuracy for the ring 6 to be processed.

[0037] Reference Figure 1 , 2 In order to facilitate the installation of the groove processing auxiliary disk 1 on the groove processing equipment 9, a positioning hole 3 is provided on the groove processing auxiliary disk 1. The positioning hole 3 extends along the central axis direction of the groove processing auxiliary disk 1 and penetrates the upper and lower end surfaces of the groove processing auxiliary disk 1. A positioning O-ring 7 is provided in the positioning groove 11. During installation, the positioning shaft 10 on the groove processing equipment 9 is inserted into the positioning hole 3. At this time, the positioning O-ring 7 will be located between the positioning shaft 10 and the positioning hole 3, which is used to accurately position the groove processing auxiliary disk 1.

[0038] However, in actual use, in order to facilitate the insertion of the positioning shaft 10 into the positioning hole 3, the positioning hole 3 and the positioning shaft 10 need to be set to a clearance fit. Since the positioning hole 3 is relatively long and the groove processing auxiliary disk 1 itself has a certain weight, after the groove processing auxiliary disk 1 is installed on the groove processing equipment 9, it is easy for the axial direction of the positioning shaft 10 and the axial direction of the positioning hole 3 to not coincide. In order to avoid this situation, the positioning O-rings 7 are set to two groups, and the two groups of positioning O-rings 7 are located at the upper end side and the lower end side of the groove processing auxiliary disk 1.

[0039] Reference Figure 3 A plurality of de-weighting holes 8 are arranged along the upper and lower directions of the groove processing auxiliary disk 1. The de-weighting holes 8 penetrate the upper and lower end surfaces of the groove processing auxiliary disk 1. A plurality of de-weighting holes 8 are evenly distributed around the positioning hole 3. In this embodiment, there are 6 de-weighting holes 8, which can greatly reduce the weight of the groove processing auxiliary disk 1 and reduce the difficulty of replacing the groove processing auxiliary disk 1.

[0040] Reference Figure 2 , 4In order to facilitate the installation of the positioning O-ring 7, a positioning groove 11 is opened on the inner wall of the positioning hole 3, and the positioning O-ring 7 is located in the positioning groove 11. In order to further make the matching accuracy of the positioning hole 3 and the positioning groove 11 higher and avoid the situation that the groove-type processing auxiliary disk 1 is easy to shake, a positioning spring 12 is also arranged in the positioning groove 11. The positioning spring 12 is a spiral spring. The positioning spring 12 is arranged along the positioning groove 11 for a circle, so that the positioning spring 12 surrounds the positioning hole 3, and the height of the positioning spring 12 protruding from the positioning groove 11 is less than the height of the positioning O-ring 7 protruding from the positioning groove 11. The diameter of the positioning spring 12 is less than the diameter of the positioning O-ring 7. In order to enable the positioning spring 12 to work effectively, a resistance platform 13 is provided in the positioning groove 11, and the resistance platform 13 can resist the positioning spring 12, so that the positioning spring 12 protrudes from the positioning groove 11. At the same time, the positioning spring 12 and the positioning O-ring 7 fit each other, and the tangent direction of the positioning spring 12 and the positioning O-ring 7 at the fitting position is tilted downward from left to right. Therefore, when the positioning O-ring 7 is squeezed, it will deform in the upward and downward directions, thereby pushing the positioning spring 12 and moving to the right, thereby causing the positioning spring 12 to collide with the positioning shaft 10, thereby clamping the positioning shaft 10 in the positioning hole 3 to achieve high-precision positioning. Since the circumferential clamping force of the positioning spring 12 is large, the groove-type processing auxiliary disk 1 is not prone to shaking or positioning problems in subsequent use. When the positioning shaft 10 is inserted into the positioning hole 3, the positioning shaft 10 first contacts the positioning O-ring 7, thereby pushing the positioning O-ring 7 to deform, so that the positioning O-ring 7 pushes the positioning spring 12 to bulge out of the positioning groove 1, thereby causing the positioning spring 12 to contact the positioning shaft 10, thereby positioning the positioning shaft 10, and the groove-type processing auxiliary disk 1 can be accurately positioned by the positioning spring 12 and the positioning O-ring 7.

[0041] The embodiments of this specific implementation method are all preferred embodiments of the utility model, and are not intended to limit the protection scope of the utility model. Therefore, all equivalent changes made based on the structure, shape, and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. An auxiliary device for sealing groove processing, characterized in that: include, A groove processing auxiliary disk (1) is used to be fixed on a groove processing device (9), wherein the groove processing auxiliary disk (1) has a step groove (2), and the step groove (2) is used to position a ring to be processed (6); A fixing part, used for fixing the groove processing auxiliary disk (1) on the groove processing equipment (9); The step groove (2) comprises: The step end surface (21) is used to contact the non-machined end surface (61) of the ring to be machined (6) to axially position the ring to be machined (6); and The positioning end surface (22) is used to contact the inner ring of the ring to be processed (6) to perform radial positioning on the ring to be processed (6).

2. The sealing groove processing auxiliary device according to claim 1, characterized in that: A positioning piece (4) is provided on the positioning end surface (22), and the positioning piece (4) is used to radially position the ring to be processed (6). The positioning piece (4) is located between the positioning end surface (22) and the inner ring of the ring to be processed (6), and the distance between the positioning piece (4) and the contact side of the ring to be processed (6) and the positioning end surface (22) is adjustable.

3. The sealing groove processing auxiliary device according to claim 2, characterized in that: The positioning end surface (22) is an annular surface, the positioning member (4) is annular, and the positioning member (4) is sleeved on the positioning end surface (22).

4. The sealing groove processing auxiliary device according to claim 3, characterized in that: The surface where the positioning end surface (22) is located is perpendicular to the surface where the step end surface (21) is located.

5. A sealing groove processing auxiliary device according to claim 3 or 4, characterized in that: The positioning member (4) comprises a centering O-ring (41), and the centering O-ring (41) is sleeved on the positioning end surface (22).

6. The sealing groove processing auxiliary device according to claim 5, characterized in that: A groove (5) is provided on the positioning end face (22), and the centering O-ring (41) is sleeved in the groove (5). The difference between the radius of the outer ring and the inner ring of the centering O-ring (41) is the thickness of the centering O-ring (41), and the depth of the groove (5) is greater than 1 / 2 of the thickness of the centering O-ring (41) and less than the thickness of the centering O-ring (41).

7. The sealing groove processing auxiliary device according to claim 1, characterized in that: The groove-type machining auxiliary disk (1) is provided with a plurality of step grooves (2), the step grooves (2) are annular, and the diameters of the plurality of step grooves (2) gradually increase / decrease.

8. The sealing groove processing auxiliary device according to claim 7, characterized in that: The fixing portion comprises a positioning hole (3) located on the groove-shaped machining auxiliary disk (1).

9. The sealing groove processing auxiliary device according to claim 8, characterized in that: The positioning hole (3) extends along the central axis direction of the annular structure surrounded by the step groove (2), and a positioning O-ring (7) is arranged in the positioning hole (3).

10. The sealing groove processing auxiliary device according to claim 1, characterized in that: The groove-shaped processing auxiliary disk (1) is provided with a deweighting hole (8).

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