Adaptive split sealing device

Abstract

The present invention relates to the field of sealing, and more particularly to an adaptive split-type sealing device comprising a dynamic ring and a static ring portion, the two being connected in a sliding, sealed manner. The dynamic ring has an elastic sealing ring with circumferentially distributed protrusions on its outer side. The elastic sealing ring is positioned within the dynamic ring in an extruded manner, and has recesses corresponding to the protrusions on the dynamic ring. The static portion is shell-shaped, and the dynamic ring is positioned within the static portion. Both sides of the dynamic ring are connected to the inner wall of the static portion in a sliding, sealed manner. The elastic sealing ring allows for free adjustment of its position on the main shaft of the device, eliminating the need for fixed-distance installation. Compared to existing technologies, the structure adopted in this solution is simple, easy to disassemble and maintain, and beneficial for cost control.

Description

Technical Field

[0001] The present invention relates to the field of sealing, and in particular to an adaptive split sealing device. Background Art

[0002] At present, various industries such as food, chemical, mining and pharmaceutical production processes require the use of some mixing, extrusion and stirring equipment. In order to avoid leakage of materials during the production process, sealing devices are generally used to solve the sealing problem of the power rotating parts and silo connections of the equipment.

[0003] The Chinese invention patent with announcement number CN211951436U discloses a combined static ring type rotary shaft seal, which includes a clamp, a sleeve, a dynamic ring, and a combined static ring set. The clamp needs to be installed first with the main shaft of the equipment in actual operation. This has the following disadvantages: the sleeve, the dynamic ring, and the combined static ring set can only be adapted and installed with the clamp after the clamp is fixed. The position of the clamp must be fixed in advance for the overall installation of the sealing device. On the contrary, when the sealing device is installed as a whole, if the overall position continues to be changed, it is difficult to adjust the clamp, resulting in a limited fixed-distance installation. In addition, since the device uses a clamp transmission, there is a structure that adapts to the clamp transmission, and the structure is relatively complex, which further leads to more parts that need to be disassembled for later maintenance, which is not conducive to cost control.

[0004] In view of the above problems, we propose an adaptive split sealing device. Summary of the Invention

[0005] In order to overcome the problems in the prior art that fixed-distance installation is required and the structure is complex and difficult to maintain, the present invention proposes an adaptive split sealing device, which uses an elastic sealing ring to automatically adjust the position on the main shaft of the equipment and does not require fixed-distance installation. Compared with the prior art, the structure adopted in this solution is simple, easy to disassemble and maintain, and is conducive to cost control.

[0006] An adaptive split sealing device includes a dynamic ring and a static part, and the two are connected in a sliding and sealing manner. The dynamic ring is provided with an elastic sealing ring, and the outer side of the elastic sealing ring is provided with circumferentially distributed protrusions. The elastic sealing ring is located inside the dynamic ring in an extruded manner, and the dynamic ring has a clearance groove corresponding to each of the protrusions. The static part is shell-shaped and the dynamic ring is located inside the static part. The two sides of the dynamic ring are connected to the inner wall of the static part in a sliding and sealing manner.

[0007] Preferably, the dynamic ring is a split structure, which includes two rings, ring one and ring two, of the same shape and located on both sides of the elastic sealing ring. The side of the ring one and ring two close to the elastic sealing ring is provided with an annular notch for squeezing the elastic sealing ring. The width of the notch is less than half the width of the elastic sealing ring, and the give way grooves are distributed on the notch and form an integral structure with it.

[0008] Preferably, the static part includes a cylindrical fixing seat and a pressure cover, which are connected by countersunk bolts. Static rings are provided on the inner walls of the fixing seat and the pressure cover. The opposite side of the static ring is connected to the dynamic ring in a sliding sealing state. When the elastic sealing ring is in an extruded state with rings one and two on both sides, the distance between rings one and two is 0.5-1mm.

[0009] Preferably, the surfaces of the static ring and the dynamic ring that are close to each other are smooth, finely machined surfaces.

[0010] Preferably, the fixing seat and the pressure cover are fixedly connected by bolts and an annular groove is provided between the contact surfaces of the two. A sealing ring is installed in the annular groove to form a seal between the fixing seat and the pressure cover.

[0011] Preferably, annular oil grooves are concentrically provided on both sides of the dynamic ring, and lubricating oil is contained in the oil grooves so as to seep out from the oil grooves to reduce the friction between the two.

[0012] Preferably, the structures of the fixing seat, pressure cover, static ring, ring one and ring two are all combined structures formed by splicing two semicircular ring parts, and the two semicircular ring parts are tangentially provided with through holes along the arc surfaces on both sides of them. The through hole of one of the semicircular parts is a countersunk hole, and a countersunk bolt is inserted into the countersunk hole. One end of the countersunk bolt is inserted into the through hole of the other circular ring part and is fastened by a nut, and the countersunk bolt and the nut are completely embedded in the through hole.

[0013] Preferably, the cross-sectional shape of the elastic sealing ring is adapted to the cross-sectional shape of the notches on the dynamic rings on both sides, and elastic convex bands are provided on both sides of the inner wall so that the elastic sealing ring can be stretched to both sides after the main shaft presses the elastic convex bands.

[0014] The beneficial effects of the present invention are as follows: the above-mentioned scheme is provided with an elastic sealing ring, a dynamic ring is sleeved on the elastic sealing ring, and a static part is sleeved on the dynamic ring. When the static part is fixed to the equipment and the elastic sealing ring is connected to the main shaft, the sealing device can be freely adjusted along the main shaft and does not need to be installed at a fixed distance. Compared with the existing technology, the structure adopted in this scheme is simpler and easy to disassemble and maintain. Only the aged elastic sealing ring needs to be replaced, which is conducive to cost control. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0016] Figure 2 Schematic diagram of the exploded structure of each part in this device;

[0017] Figure 3 It is a schematic cross-sectional view of the present invention;

[0018] Figure 4 Schematic diagram of the structure of the elastic sealing ring;

[0019] Figure 5 It is the structural diagram of the dynamic ring;

[0020] Figure 6 for Figure 5 Schematic diagram of the rear view structure;

[0021] Figure 7 This is a structural diagram of the static ring. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0023] Example 1: In this embodiment, an adaptive split-type sealing device includes a dynamic ring 2 and a static portion, and the two are connected in a sliding seal. The dynamic ring 2 has an elastic sealing ring 1, and the outer side of the elastic sealing ring 1 has circumferentially distributed protrusions 101. The elastic sealing ring 1 is squeezed inside the dynamic ring 2. The dynamic ring 2 has a clearance groove 2001 corresponding to the protrusions 101. The static portion is shell-shaped and the dynamic ring 2 is located within the static portion. The two sides of the dynamic ring 2 are connected to the inner wall of the static portion in a sliding seal. The protrusions 101 on the elastic sealing ring 1 make the dynamic ring 2 and the elastic sealing ring 1 form a linked structure. The elastic sealing ring 1 does not need to be installed on the main shaft of the equipment first. This solution can be directly pressed onto the main shaft of the equipment after the sealing device is pre-installed, simplifying the installation steps.

[0024] Specifically, four protrusions 101 are evenly provided along the outer side of the ring wall of the elastic sealing ring 1. Correspondingly, the dynamic ring 2, namely ring 1 201 and ring 2 202, are both provided with an annular notch 2002 adapted to the elastic sealing ring 1, and four makeshift grooves 2001 are provided on the annular notch 2002. When ring 1 201 and ring 2 202 press the elastic sealing ring 1 from both sides, the elastic sealing ring 1 together with the protrusions 101 extend into the notch 2002 and the makeshift groove 2001. At this time, the elastic sealing ring 1 and the dynamic ring 2 are relatively fixed to achieve positioning.

[0025] Example 2: In this example, Figure 1-5 As shown, the dynamic ring 2 is a split structure, which includes two rings 1 201 and 202 of the same shape and located on both sides of the elastic sealing ring 1. The rings 1 201 and 202 are each provided with an annular notch 2002 on one side close to the elastic sealing ring 1 for squeezing the elastic sealing ring 1. The width of the notch 2002 is less than half the width of the elastic sealing ring 1. The makeshift grooves 2001 are distributed on the notch 2002 and form an integral structure therewith. The setting of the notch 2002 is used to fix the elastic sealing ring 1 and to ensure the sealing effect by squeezing the elastic sealing ring 1.

[0026] Furthermore, elastic convex strips 102 are provided on both sides of the inner wall of the elastic sealing ring 1 so that the elastic sealing ring 1 can be stretched to both sides after the main shaft compresses the elastic convex strips 102, so that both sides of the elastic sealing ring 1 are pressed against the notch 2002 to form a seal.

[0027] Example 3: In this embodiment, the static part is formed by a fixed seat 3 and a pressure cover 4 fixedly connected. The fixed seat 3 and the pressure cover 4 are cylindrical, and there is an adapter hole in the center for the main shaft to pass through. The fixed seat 3 and the pressure cover 4 are fixedly connected with a static ring 5 on the inner wall by bolts, and the opposite side of the static ring 5 is connected to the dynamic ring 2 in a sliding and sealing manner.

[0028] In this embodiment, both sides of ring one 201 and ring two 202 are pressed by the static ring 5. Furthermore, the surfaces of the static ring 5 and the dynamic ring 2 that are close to each other are smooth, finely machined surfaces, which are used to reduce the friction between the two and thereby extend their service life. Furthermore, the fixed seat 3 and the pressure cover 4 are fixedly connected by bolts and a ring groove 301 for installing a sealing ring is provided between the fitting surfaces of the two. After the sealing ring is installed, it is used to ensure the sealing effect between the fixed seat 3 and the pressure cover 4.

[0029] It should be noted that, when the sealing device is installed, the elastic sealing ring 1 is pressed by ring 1 201 and ring 2 202, and the two sides of ring 1 201 and ring 2 202 are pressed by the static ring 5. At this time, the distance between ring 1 201 and ring 2 202 is 0.5-1mm. If the value is too large, the connection of the sealing device is too loose, and if the value is too small, it is too tight. Both situations will cause the transmission effect to deteriorate.

[0030] Example 3: Figure 2 As shown in 3 or 5, annular oil grooves are concentrically provided on both sides of the dynamic ring 2 (ring 1 201 and ring 2 202 in the figure). The oil grooves are used to quantitatively store lubricating oil to ensure the lubrication effect of the dynamic ring 2 and the static ring 5 during the relative motion, further extending the service life of the parts.

[0031] In the present invention, Figure 1-3 or as Figure 5-7 As shown, the structures of the fixing seat 3, the pressure cover 4, the static ring 5, the ring 1 201 and the ring 2 202 are all combined structures formed by splicing two semicircular ring parts, and the two semicircular ring parts are fixedly connected by bolts after being combined. Most of the structures in this device adopt this combined structure formed by splicing semicircular ring parts. In case of maintenance or parts replacement, there is no need to disassemble the device one by one, and the parts that need to be replaced can be selected for disassembly, thereby improving work efficiency.

[0032] It should be noted that the two semicircular ring parts are tangentially provided with through holes along the arc-shaped surfaces on both sides thereof. The through hole of one of the semicircular parts is a countersunk hole, and a countersunk bolt is inserted into the countersunk hole. One end of the countersunk bolt is inserted into the through hole of the other circular ring part and then fastened with a nut. The countersunk bolt and the nut are completely buried in the through hole, that is, the through hole is used to hide the countersunk bolt and the nut.

[0033] Specifically, the cross-sectional shape of the elastic sealing ring 1 is adapted to the cross-sectional shape of the notches 2002 on the dynamic rings 2 on both sides, ensuring that the elastic sealing ring 1 is approximately fitted with the notches 2002 when compressed.

[0034] In the present invention, since the static ring 5 is provided with a countersunk hole and is threadedly connected to the inner wall of the fixing seat 3 through a countersunk bolt, similarly, the static ring 5 is also fixedly connected to the pressure cover 4 through a countersunk bolt. Since the structures of the fixing seat 3, the pressure cover 4, the static ring 5 and the ring one 201 and the ring two 202 are all combined structures formed by splicing two semicircular ring parts, each static ring 5, the fixing seat 3 and the two semicircular ring parts in the pressure cover 4 have two countersunk holes respectively to ensure the connection effect.

[0035] The working principle of the above invention is as follows: the dynamic ring 2 includes ring 1 201 and ring 2 202, and ring 1 201 and ring 2 202 are located on both sides of the elastic sealing ring 1. When ring 1 201 and ring 2 202 are fixedly connected by bolts, the annular notch 2002 on ring 1 201 and ring 2 202 adapts to the elastic sealing ring 1. Since the width of the notch 2002 is less than half the width of the elastic sealing ring 1, ring 1 201 and ring 2 202 will squeeze the elastic sealing ring 1 during the approach process, thereby fixing the elastic sealing ring 1 between ring 1 201 and ring 2 202. Secondly, the static part includes a fixing seat 3 and a pressure cover 4. The inner surfaces of the fixing seat 3 and the pressure cover 4 are connected with a static ring 5 by bolts. When the fixing seat 3 and the pressure cover 4 are fixedly connected by bolts, , the fixed seat 3 and the pressure cover 4 are close to each other, so that the ring 1 201 and the ring 2 202 are respectively pressed on the static ring 5 on both sides to form a sliding sealing contact. Since there is a ring groove 301 for installing the sealing ring between the fixed seat 3 and the pressure cover 4, the sealing effect can be guaranteed between the fixed seat 3 and the pressure cover 4. The sides where the static ring 5 and the dynamic ring 2 are close to each other are smooth and finely machined surfaces, thereby forming a contact seal. When the device is installed on the main shaft of the equipment using the elastic sealing ring 1, an effective seal can be formed. At the same time, since a contact seal is formed between the dynamic ring 2 and the static ring 5, when the static part is connected to the equipment and the main shaft is located in the center of the device, the dynamic ring 2 floats up and down along the surface of the static ring 5, is not affected by the main shaft alignment, and can still ensure the basic function of the device.

[0036] It should be noted that, compared with the existing technology, the sealing device can be freely adjusted along the length direction of the main shaft during installation, and does not require installation at a fixed distance. The structure adopted in this solution is simpler and easy to disassemble and maintain. Only the aged elastic sealing ring 1 needs to be replaced, which is conducive to cost control.

[0037] The components in the present invention are all universal standard parts or components known to those skilled in the art, and their structures and principles can be known to those skilled in the art through technical manuals or conventional experimental methods.

[0038] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. An adaptive split sealing device, comprising a dynamic ring and a static part connected in a sliding seal, characterized in that: The movable ring is provided with an elastic sealing ring, and the outer side of the elastic sealing ring has circumferentially distributed protrusions. The elastic sealing ring is located inside the movable ring in an extruded manner, and the movable ring has a clearance groove corresponding to each of the protrusions. The static part is shell-shaped and the movable ring is located inside the static part. Both sides of the movable ring are connected to the inner wall of the static part in a sliding and sealing manner. The dynamic ring is a split structure, which includes two rings, a first ring and a second ring, of the same shape and located on both sides of the elastic sealing ring; A static ring is provided on the inner wall of the fixing seat and the gland. The side of the static ring facing the dynamic ring is connected in a sliding and sealing manner. When the elastic sealing ring is in a squeezed state with the rings 1 and 2 on both sides, the distance between the rings 1 and 2 is 0.5-1mm. The surfaces of the static ring and the dynamic ring that are close to each other are smooth, finely machined surfaces; Annular oil grooves are concentrically provided on both sides of the dynamic ring. Lubricating oil is contained in the oil grooves so as to seep out from the oil grooves to reduce the friction between the two.

2. The adaptive split sealing device according to claim 1, characterized in that: The sides of the rings one and two close to the elastic sealing ring are both provided with an annular notch for squeezing the elastic sealing ring. The width of the notch is less than half the width of the elastic sealing ring. The relief grooves are distributed on the notch and form an integral structure with it.

3. The adaptive split sealing device according to claim 1, characterized in that: The static part includes a cylindrical fixing seat and a pressure cover, and the fixing seat and the pressure cover are connected by countersunk bolts.

4. The adaptive split sealing device according to claim 3, characterized in that: The fixing seat and the pressure cover are fixedly connected by bolts, and an annular groove is provided between the contact surfaces of the two. A sealing ring is installed in the annular groove to form a seal between the fixing seat and the pressure cover.

5. The adaptive split sealing device according to claim 2, characterized in that: The structures of the fixing seat, pressure cover, static ring, ring one and ring two are all combined structures formed by splicing two semicircular ring parts. The two semicircular ring parts are tangentially provided with through holes along the arc-shaped surfaces on both sides. The through hole of one of the semicircular parts is a countersunk hole, and a countersunk bolt is inserted into the countersunk hole. One end of the countersunk bolt is inserted into the through hole of the other circular ring part and is fastened by a nut, and the countersunk bolt and the nut are completely embedded in the through hole.

6. The adaptive split sealing device according to claim 5, characterized in that: The cross-sectional shape of the elastic sealing ring is adapted to the cross-sectional shape of the notches on the dynamic rings on both sides, and elastic convex bands are provided on both sides of the inner wall so that the elastic sealing ring can be stretched to both sides after the main shaft presses the elastic convex bands.

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