Positioning device of self-impact sealing suspension column and positioning method thereof

Abstract

The invention discloses a positioning device and a positioning method of a self-impact sealing suspension column, the positioning device comprises a self-impact sealing static ring, a dynamic ring and a suspension column, the suspension column is assembled on the static ring or the dynamic ring through the positioning device; the positioning device comprises one or more combinations of a double-thread positioning structure, a floating pin positioning structure and a taper pin positioning structure; compared with an existing self-impact sealing suspension column assembly scheme, the self-impact sealing suspension column assembly method has the advantages that through threaded connection, the suspension column can be assembled in a sealing device more simply and conveniently, the positioning precision requirement is met, the precision requirement of a sealing gap is guaranteed, and the leakage suppression efficiency of the sealing device is guaranteed. Threaded connection is more reliable, assembly and disassembly are more convenient, and the installation and use efficiency is greatly improved.

Description

Technical Field

[0001] The invention belongs to the technical field of sealing assembly positioning, and in particular relates to a positioning device and a positioning method of a self-impact sealing suspension column. Background Art

[0002] The self-impact seal has the advantages of stable sealing gap, no dependence on spindle speed, high throttling efficiency, simple structure, and concise system. Patent Publication No. CN115076374B discloses a non-contact self-impact seal with high throttling efficiency and fixed gap, but the patent document does not reflect the assembly problem of the suspension column. Patent Publication No. CN118309797A discloses a fixing device for the suspension column in a self-impact seal structure, and its structure is to fix the self-impact seal suspension column by using aluminum foil, screws, staples, clamps, and single or multiple components in the positioning column, but as Figure 1 As shown, the suspension column is fixed to the dynamic and static rings by aluminum foil and epoxy resin. This process is not only complicated to operate and takes a long time to install: the seal needs to be immersed in a high-concentration sodium hydroxide solution for more than 12 hours during aluminum foil positioning and disassembly, and the epoxy resin positioning requires a static cooling time of more than 24 hours, and more cumbersome operation and removal steps are also required during disassembly. Both require subsequent cleaning of the sealing dynamic and static rings and the suspension column, and the assembly positioning accuracy of this fixing method cannot be guaranteed, which causes a lot of trouble to the cost and time of the overall assembly of the sealing device. Summary of the invention

[0003] The purpose of the present invention is to design a positioning device for a self-impact sealing suspension column, which can be assembled more conveniently by combining a double-thread positioning structure, a floating pin positioning structure and a conical pin positioning structure on the suspension column and the dynamic and static rings, and can achieve high-precision positioning of each component.

[0004] In order to achieve the above object, the technical solution adopted by the present invention is as follows: A positioning device for a self-impact sealing suspension column comprises a static ring, a dynamic ring and a suspension column of the self-impact sealing, and is characterized in that the suspension column is assembled to the static ring or the dynamic ring through a positioning device, and the positioning device comprises one or more combinations of a threaded positioning structure, a floating pin positioning structure and a conical pin positioning structure.

[0005] Furthermore, the threaded positioning structure is provided with threads on the protruding part of the suspension column, and threads are also provided on the corresponding protruding part of the dynamic ring or the static ring, and the suspension column is screwed to the dynamic ring or the static ring through the threads.

[0006] Furthermore, the floating pin positioning structure includes a floating pin and a spring. A positioning slot is opened on the bottom plate of the suspension column, and the positioning slot is installed on the corresponding static ring or dynamic ring. One end of the spring is connected to the floating pin, and the floating pin supports the positioning slot of the suspension column. The other end of the spring is set in the positioning slot of the static ring or dynamic ring.

[0007] Furthermore, the conical pin positioning structure includes a pin hole opened on the stationary ring, a conical pin is installed in the pin hole, and the conical pin is used to locate the position of the suspension column.

[0008] The following beneficial effects can be obtained through the above technical solution: Compared with the existing self-impact sealing suspension assembly solution, the present invention can more easily realize the assembly of the suspension in the sealing device and meet the positioning accuracy requirements through threaded connection, ensure the accuracy requirements of the sealing gap, and ensure the leakage suppression efficiency of the sealing device. The threaded connection is more reliable and more convenient to assemble and disassemble, which greatly improves the installation and use efficiency. Compared with the existing solution of fixing the suspension by clamping rings and staples, it can reduce the processing and assembly procedures and improve the positioning accuracy between the components.

[0009] The addition of a floating pin positioning structure can reduce the machining accuracy and machining cost of the double-sided threads while achieving the assembly, disassembly and positioning of the suspension column more easily and accurately. The addition of a conical pin positioning structure can achieve the positioning of the suspension column and ensure the sealing gap by screwing the screw to the bottom, and can be directly disassembled, which can further avoid the machining and disassembly costs caused by the floating pin positioning. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a schematic diagram of the existing aluminum foil fixing structure.

[0011] Figure 2 It is a schematic diagram of a double thread connection structure.

[0012] Figure 3 It is a schematic diagram of the thread-floating pin type structure.

[0013] Figure 4 It is a schematic diagram of the thread-taper pin type structure.

[0014] Figure 5 It is a schematic diagram of the circumferential dimensions of the thread.

[0015] Figure 6 This is a partial enlarged view of the double threaded connection type.

[0016] Figure 7 This is a partial enlarged view of the thread-floating pin type.

[0017] Figure 8 It is a partial enlarged view of the thread-taper pin type.

[0018] Fig. 9It is a schematic diagram of thread, floating pin and tapered pin structure.

[0019] Fig.10 This is a partial enlarged view of the thread, floating pin and tapered pin.

[0020] In the figure: In the figure: 1. static ring; 2. dynamic ring; 3. fine thread; 4. shaft; 5. bushing; 6. suspension column; 7. floating pin; 8. spring; 9. pin hole; 10. tapered pin. DETAILED DESCRIPTION

[0021] The present invention will be further described below in conjunction with the accompanying drawings: A positioning device for a self-impact sealing suspension column comprises a static ring 1, a dynamic ring 2 and a suspension column 6 of the self-impact sealing. The suspension column is assembled to the static ring or the dynamic ring through a positioning device. The positioning device comprises one or more combinations of a threaded positioning structure, a floating pin positioning structure and a conical pin positioning structure.

[0022] A shaft sleeve 5 is installed outside the shaft 4, and a dynamic ring 2 is arranged on the shaft sleeve. The dynamic ring, the static ring and the suspension column constitute a self-impact sealing structure, wherein the suspension column is assembled to the static ring or the dynamic ring through a positioning device. The specific assembly and positioning are detailed in the following embodiment.

[0023] Example 1: Double thread connection structure like Figure 2 It is a double thread connection diagram and Figure 6 The partial enlarged view of the double thread connection type shown in the figure, in this embodiment, the inner and outer sides of the suspension column are both tapped with fine pitch threads 3, and the dynamic and static rings are also tapped with fine pitch threads of the same rotation direction, which are arranged intermittently at equal angles along the circumferential direction, and the circumferential dimension of the threads does not need to be too large, and the connection strength requirements can be met. Figure 5 As shown. Such unique structural features can ensure the normal flow of fluid along the circumference, thereby forming impact effects at various levels. The suspension columns in a row near the center of rotation are connected to the dynamic ring through threads. The assembly of the suspension columns is achieved through fine threads with the same rotation direction and pitch on the inside and outside. The fine threads on both sides can achieve the thread loosening prevention requirements in occasions where vibration is not severe. The positioning accuracy is mainly controlled by the thread engagement cutoff, which requires a certain degree of processing accuracy.

[0024] It should be noted that the bottom layer (the row close to the center of rotation) of the self-impact seal shown in this embodiment is the inlet and outlet, so the suspension column and the dynamic ring of this layer are positioned by a double-thread positioning structure, that is, fine threads with the same rotation direction are tapped on the dynamic ring, while the suspension columns and static rings of other layers are positioned by a double-thread positioning structure.

[0025] The positioning method of this embodiment 1: First, screw the suspension column into the stationary ring through the thread connection until the suspension column slowly rotates to the bottom of the thread line, and screw the suspension column near the rotation center into the dynamic ring. The dynamic and static rings and other components can be assembled from left to right according to the self-impact seal assembly steps.

[0026] When disassembling, first remove the static ring from the sealing device, then remove the suspension column on the static ring by rotating it through the threaded connection, and finally remove the suspension column on the dynamic ring in the same way as above. The dynamic and static ring components are disassembled according to the self-impact seal disassembly steps. Use special tools to disassemble and assemble the suspension column to prevent the suspension column from deforming too much and affecting the assembly and positioning accuracy.

[0027] Embodiment 2: Thread and floating pin matching connection structure like Figure 3 and Figure 7 Shown are a schematic diagram and a partial enlarged diagram of the threaded floating pin type of Example 2, respectively. The floating pin positioning structure includes a floating pin 7 and a spring 8. The upper part of the floating pin 7 is arranged in the positioning slot hole of the suspension column, and the lower part of the spring is located in the positioning slot hole of the dynamic ring or the static ring.

[0028] Embodiment 2 is based on a fine-pitch threaded connection, and 1-2 floating pin positioning structures are designed on the dynamic ring or the static ring, and corresponding positioning slots are opened at the corresponding positions of the suspension. The floating pin and the positioning slot are designed with large rounded corners. When the suspension is screwed in through the threaded connection, the floating pin is compressed until the floating pin falls into the positioning slot. When the threaded connection is screwed out, the suspension also compresses the floating pin until the suspension is disassembled. This design uses a floating pin to accurately position the suspension. It only needs to determine the positioning accuracy of the suspension and the dynamic and static rings. It is more accurate and easier to operate than using the spiral meshing cutoff for control, and it can also ensure that the suspension will not produce axial movement due to loose threaded connection. This solution can reduce the processing accuracy requirements for the double-sided spiral, and there is no need to worry about the deformation of the thread during multiple assembly and disassembly affecting the connection strength and accuracy.

[0029] Similar to Example 1, the bottom layer (a row close to the center of rotation) of the self-impact seal shown in this example is the inlet and outlet, so the upper surface of the suspension column of this layer is connected to the dynamic ring through a threaded positioning structure, and the lower surface of the suspension column is connected to the dynamic ring through a floating pin positioning structure, and the static rings of other layers of suspension columns are evenly positioned and assembled through a combination of threaded positioning and floating pin positioning.

[0030] The positioning method of this embodiment 2: First, install the floating pin into the pre-designed positioning pin hole of the dynamic or static ring; then slowly screw the suspension column into the static ring. When the floating pin enters the pre-opened positioning hole, the screwing action stops, and the suspension column near the rotation center is screwed into the dynamic ring. The dynamic and static rings and other components can be assembled from left to right according to the self-impact seal assembly steps.

[0031] During the final disassembly, first remove the static ring from the sealing device and slowly unscrew the suspension column. When unscrewing it, the suspension column compresses the floating pin through the designed fillet, so that the suspension column can be smoothly disassembled. Then remove the suspension column on the dynamic ring in the same way as above, and disassemble the dynamic and static rings and other components according to the self-impact seal disassembly steps.

[0032] Embodiment 3: Thread and conical pin matching connection structure like Figure 4 and Figure 8 The diagrams and partial enlarged views of the threaded conical pin of Embodiment 3 are shown respectively. Based on the fine-pitch thread connection, Embodiment 3 opens a pin hole 9 in the middle of the annular groove of the stationary ring, installs a conical pin 10 in the pin hole, and realizes the positioning accuracy of the suspension column through the conical pin. When installing, the screw can be screwed into the bottom and can be directly disassembled. This design only needs to ensure the depth of the pin hole and the length of the conical pin. Compared with Embodiments 1 and 2, this embodiment has lower processing accuracy and difficulty, and is more convenient to assemble and disassemble, but a tighter thread form needs to be used for connection to ensure the connection strength.

[0033] The positioning method of this embodiment 3: First, install the conical pin into the pin hole in the stationary ring groove. Then slowly screw the suspension column into the stationary ring until one side of the suspension column contacts the conical pin, and screw the suspension column row close to the rotation center into the dynamic ring. The dynamic and static rings and other components can be assembled from left to right according to the self-impact seal assembly steps.

[0034] During the final disassembly, first remove the static ring from the sealing device, and slowly unscrew the suspension column, then remove the suspension column on the dynamic ring in the above manner, and finally remove the conical pin from the pin hole. The dynamic and static rings and other components are disassembled according to the self-impact seal disassembly steps.

[0035] Embodiment 4: Thread, floating pin and conical pin matching connection structure Fig. 9 and 10 As shown, this embodiment is to open a fine thread on the upper surface of the suspension, open a pin hole in the middle of the annular groove of the stationary ring, install a conical pin in the pin hole, and achieve the positioning accuracy of the suspension through the conical pin. 1-2 floating pin positioning structures are set on the lower surface of the suspension, that is, through the combination of the double thread positioning structure, the floating pin positioning structure and the conical pin positioning structure, the stability and accuracy of the suspension installation are guaranteed, and axial movement will not be generated due to loose threaded connection, and the strength of the connection is also ensured.

[0036] The positioning method of this embodiment 4: First, install the conical pin into the pin hole in the static ring groove, and install the floating pin into the pre-designed positioning pin hole in the dynamic and static rings. Then slowly screw the suspension column into the static ring. When the floating pin enters the pre-opened positioning hole, the screwing action stops. At this time, one side of the suspension column just touches the conical pin, and screw the suspension column near the center of rotation into the dynamic ring. The dynamic and static rings and other components can be assembled from left to right according to the self-impact seal assembly steps.

[0037] During the final disassembly, first remove the static ring from the sealing device and slowly unscrew the suspension column. When unscrewing it, the suspension column compresses the floating pin through the designed fillet, so that the suspension column can be smoothly disassembled. Then remove the suspension column on the dynamic ring in the above manner, and finally remove the conical pin from the pin hole. The dynamic and static rings and other components are disassembled according to the self-impact seal disassembly steps.

[0038] The above are all preferred embodiments of the present invention. For ordinary technicians in this technical field, without departing from the principle of the present invention, various equivalent modifications to the present invention belong to the protection scope of the claims attached to this application.

Claims

1. A positioning device for a self-impact sealing suspension column, comprising a static ring, a dynamic ring and a suspension column of a self-impact seal, characterized in that: The suspension column is assembled to the stationary ring or the dynamic ring through a positioning device, and the positioning device includes one or more combinations of a threaded positioning structure, a floating pin positioning structure and a conical pin positioning structure.

2. A positioning device for a self-impact sealing suspension column according to claim 1, characterized in that: The threaded positioning structure is that threads are provided on the protruding part of the suspension column, and threads are also provided on the corresponding protruding part of the dynamic ring or the static ring, and the suspension column is screwed to the dynamic ring or the static ring through the threads.

3. The positioning device for a self-impact sealing suspension column according to claim 1, characterized in that: The floating pin positioning structure includes a floating pin and a spring. A positioning slot is provided on the bottom plate of the suspension column, and a positioning slot is installed on the corresponding static ring or dynamic ring. One end of the spring is connected to the floating pin, and the floating pin supports the positioning slot of the suspension column. The other end of the spring is set in the positioning slot of the static ring or dynamic ring.

4. The positioning device for a self-impact sealing suspension column according to claim 1, characterized in that: The conical pin positioning structure comprises a pin hole provided on a stationary ring, a conical pin is installed in the pin hole, and the conical pin is used to locate the position of the suspension column.

5. A method for assembling the self-impact sealing suspension column positioning device according to claim 1, characterized in that: Only the threaded positioning structure forms the positioning device, and its assembly positioning method is as follows: first, screw the suspension column into the static ring through the threaded connection until the suspension column slowly rotates to the bottom of the thread line, and screw a row of suspension columns close to the rotation center into the dynamic ring. The dynamic and static rings and other components can be assembled from left to right according to the self-impact seal assembly steps.

6. A method for assembling the self-impact sealing suspension column positioning device according to claim 1, characterized in that: The positioning device formed by the combination of the threaded positioning structure and the floating pin positioning structure has the following assembly and positioning method: first, install the floating pin into the pre-designed positioning pin hole of the dynamic or static ring; then slowly screw the suspension column into the static ring, and when the floating pin enters the pre-opened positioning hole, the screwing action stops, and a row of suspension columns near the rotation center are screwed into the dynamic ring, and the dynamic and static rings and other components can be assembled from left to right according to the self-impact seal assembly steps.

7. A method for assembling the self-impact sealing suspension column positioning device according to claim 1, characterized in that: The positioning device formed by the combination of the threaded positioning structure and the conical pin positioning structure has the following assembly and positioning method: first, install the conical pin into the pin hole opened in the static ring groove, then slowly screw the suspension column into the static ring until one side of the suspension column contacts the conical pin, screw a row of suspension columns close to the rotation center into the dynamic ring, and assemble the dynamic and static rings and other components from left to right according to the self-impact seal assembly steps.

8. A method for assembling the self-impact sealing suspension column positioning device according to claim 1, characterized in that: The threaded positioning structure, the floating pin positioning structure and the tapered pin positioning structure are combined to form a positioning device, and the assembly and positioning method is as follows: first, install the tapered pin into the pin hole opened in the static ring groove, and at the same time install the floating pin into the pre-designed positioning pin hole of the dynamic ring or static ring, and then slowly screw the suspension column into the static ring. When the floating pin enters the pre-opened positioning hole, the screwing action stops. At this time, one side of the suspension column just contacts the tapered pin, and screw a row of suspension columns close to the rotation center into the dynamic ring; the dynamic and static rings and other components can be assembled from left to right according to the self-impact seal assembly steps.

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