Shaft end sealing structure of bulking machine
By installing a sealing assembly consisting of a self-lubricating pressure ring and packing at the shaft end of the extruder, the problem of unsatisfactory sealing effect is solved, achieving a more efficient sealing effect and reducing equipment maintenance costs.
Patent Information
- Application Number
- CN202422958699.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-02
- Publication Date
- 2025-11-28
- Estimated Expiration
- 2034-12-02
AI Technical Summary
The sealing effect of the shaft end seal structure of the extruder is not ideal, which leads to material and steam leakage, affecting the production environment and equipment maintenance frequency, and increasing costs.
A sealing assembly including a self-lubricating pressure ring and packing is adopted, combined with a misaligned collar and a metal slip ring to form a tiered seal. A sealing mounting hole is provided on the support to compensate for the radial displacement of the spindle, and a dust sleeve and dust retaining ring are used to enhance the sealing effect.
It significantly improves sealing performance, reduces material and vapor leakage, extends equipment life, and lowers maintenance frequency and costs.
Smart Images
Figure CN223609297U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the field of bulking machine, especially point to a kind of bulking machine shaft end sealing structure. BACKGROUND
[0002] Bulking machine is a kind of equipment commonly used in granular feed processing process, for the powder after preliminary conditioning curing, after extrusion, shearing, mixing, kneading of bulking machine, extrude from discharging device, material is extruded simultaneously by cutting device, form certain length's granular feed.
[0003] Material in bulking machine is in the state of high temperature, high pressure and high humidity during production process, although material will move to the discharge end of bulking machine under the pushing of helical screw rod, but a small part of material and steam will inevitably be reversed to the shaft end of bulking machine feeding port side.If sealing structure here is not good, leakage will be caused, and the leakage formed will cause great influence on production environment and equipment.Not only a certain amount of material waste will be caused, but also equipment maintenance frequency will be caused, maintenance cost is increased, even the production efficiency of factory will be influenced.Nowadays, packing seal structure is mostly used for sealing, but the sealing effect is not ideal.
[0004] Therefore, improving the sealing performance of bulking machine shaft end sealing structure becomes a problem to be solved. UTILITY MODEL CONTENT
[0005] Utility model purpose: in order to overcome the deficiencies in prior art, the utility model provides a kind of bulking machine shaft end sealing structure capable of improving sealing performance.
[0006] Technical scheme: a kind of bulking machine shaft end sealing structure, comprising:
[0007] Main shaft, the main shaft is sleeved with screw head for stirring material, the front end of the main shaft is provided with spline sleeve assembly;
[0008] Support, the support is sleeved on the main shaft and is used to support the main shaft, the support is located between the screw head and the spline sleeve assembly;
[0009] Dust cover and dust baffle are sequentially arranged between the support and the screw head;
[0010] And sealing assembly is located between the main shaft and the support and is sleeved on the main shaft, comprising:
[0011] Self-lubricating compression ring and packing are sequentially arranged;
[0012] Misplaced sleeve ring is sleeved on the self-lubricating compression ring and the packing;
[0013] The support is provided with a sealing mounting hole, and the sealing assembly is arranged in the sealing mounting hole.
[0014] Further, the sealing kit further comprises:
[0015] An open positioning ring abutting against the spline sleeve assembly, and a metal sliding ring and a butterfly spring are sequentially arranged between the open positioning ring and the self-lubricating compression ring.
[0016] Further, the sealing mounting hole is configured to be slightly larger than the misaligned sleeve ring, so as to form a sealing gap groove outside the misaligned sleeve ring.
[0017] Further, the dustproof sleeve rear end is provided with a rearward extending protrusion, and the dustproof blocking ring is correspondingly provided with a groove for accommodating the protrusion, and a dustproof sealing ring is further arranged in the groove.
[0018] Further, the spline sleeve assembly is further sleeved with a shell.
[0019] Beneficial effects: the puffed machine shaft end sealing structure sets the sealing assembly, and arranges the sealing assembly in the sealing mounting hole on the support, utilizes the packing and the self-lubricating compression ring to form a step-by-step sealing effect, and the self-lubricating compression ring can provide lubrication when the main shaft rotates, greatly improves the sealing effect, and prolongs the service life. BRIEF DESCRIPTION OF DRAWINGS
[0020] ATTACHED Figure 1 It is an embodiment of the puffed machine shaft end sealing structure of the utility model for a plane structure schematic view;
[0021] ATTACHED Figure 2 It is Figure 1 It is a cross-sectional structure schematic view of the puffed machine shaft end sealing structure shown.
[0022] ATTACHED Figure 3 It is Figure 2 It is an enlarged schematic view of the puffed machine shaft end sealing structure A. DETAILED DESCRIPTION
[0023] In order to make the purpose, technical scheme and advantages of the utility model more clear, the utility model is further described in detail below by combining with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the utility model, and are not used to limit the utility model. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the protection scope of the utility model.
[0024] It should be noted that the technical solutions among various embodiments can be combined with each other, but it must be based on the realization of the ordinary skilled in the art, when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, also not within the protection scope required by the utility model.
[0025] Referring to Figures 1-3 An embodiment of the utility model puffed machine shaft end sealing structure is shown, including: main shaft 6, support 2, dust cover 3, dust baffle ring 4 and sealing assembly 8. The main shaft 6 is provided with a screw head 5 for stirring material, and the front end of the main shaft 6 is provided with a spline sleeve assembly 7. The support 2 is provided on the main shaft 6 and is used to support the main shaft 6, and the support 2 is arranged between the screw head 5 and the spline sleeve assembly 7. The dust cover 3 and the dust baffle ring 4 are sequentially arranged between the support 2 and the screw head 5. The sealing assembly 8 is arranged between the main shaft 6 and the support 2 and is sleeved on the main shaft 6.
[0026] Specifically, the support 2 is provided with a sealing mounting hole 85, and the sealing assembly 8 is arranged in the sealing mounting hole 85. The sealing assembly 8 includes a staggered sleeve ring 84, a self-lubricating compression ring 87 and a packing 88. The self-lubricating compression ring 87 and the packing 88 are sequentially arranged on the main shaft 6. The staggered sleeve ring 84 is sleeved on the self-lubricating compression ring 87 and the packing 88. The packing 88 is also called sealing packing, which is usually woven by relatively soft linear objects and is widely used in shaft sealing.
[0027] By arranging the sealing assembly 8 and arranging the sealing assembly 8 in the sealing mounting hole 85 on the support 2, the packing 88 and the self-lubricating compression ring 87 form a hierarchical sealing effect, and the self-lubricating compression ring 87 can provide lubrication when the main shaft 6 rotates, greatly improving the sealing effect and prolonging the service life.
[0028] In some preferred embodiments, the sealing kit further includes an abutting opening positioning ring 80 of the spline sleeve assembly 7, and a butterfly spring 81 and a metal slip ring 82 are sequentially arranged between the opening positioning ring 80 and the self-lubricating compression ring 87. The opening positioning ring 80 is locked and fixed on the main shaft 6 by a bolt 86 to form a positioning effect, and the self-lubricating compression ring 87 and the metal slip ring 82 are mainly used to press the packing 88. The butterfly spring 81 and the opening positioning ring 80 arranged on the outside of the metal slip ring 82 are mainly used to apply elastic force to the metal slip ring 82.
[0029] In some preferred embodiments, the sealing mounting hole 85 is configured to be slightly larger than the misalignment collar 84, thereby forming a sealing gap groove 83 outside the misalignment collar 84. The provision of the sealing gap groove 83 provides a certain space for compensating the radial displacement of the main shaft 6 in rotation, thereby avoiding the occurrence of cracking of the packing 88, the self-lubricating pressure ring 87 and the misalignment collar 84 due to the extrusion of the main shaft 6 with the sealing mounting hole 85.
[0030] In some preferred embodiments, the rear end of the dust cover 3 is provided with a protrusion extending rearward, and the dust blocking ring 4 is correspondingly provided with a groove for accommodating the protrusion, and the groove is further provided with a dust sealing ring 9. The dust sealing ring 9 is made of self-lubricating wear-resistant polytetrafluoroethylene material, and the dust blocking ring 4 is pressed by the screw head 5, so that the dust sealing ring 9 is fixed between the dust blocking ring 4 and the dust cover 3, thereby preventing the material and steam from penetrating into the sealing mounting hole 85 in the intermediate support 2 from the gap of the main shaft 6. Preferably, the spline sleeve assembly 7 is further sleeved with a shell.
[0031] The above description is only the preferred embodiments of the present application, and it should be pointed out that for ordinary skilled in the art, without departing from the principles of the present application, a number of improvements and refinements can be made, and these improvements and refinements should also be considered as the protection scope of the present application.
Claims
1. A puffed machine shaft end seal structure, characterized by, The utility model relates to a main shaft, a shell, a support, a dustproof sleeve, a dustproof baffle ring, a sealing assembly and a dustproof sealing ring. The main shaft is sleeved with a screw head for stirring materials, and the front end of the main shaft is provided with a spline sleeve assembly. The support is sleeved on the main shaft and used for supporting the main shaft, and the support is arranged between the screw head and the spline sleeve assembly. A dustproof sleeve and a dustproof baffle ring are sequentially arranged between the support and the screw head. A sealing assembly is arranged between the main shaft and the support and sleeved on the main shaft, comprising: a self-lubricating pressing ring and a packing are sequentially arranged; a staggered sleeve ring is sleeved on the self-lubricating pressing ring and the packing; a sealing installation hole is formed in the support, and the sealing assembly is arranged in the sealing installation hole.
2. The extruder shaft end seal structure of claim 1, wherein: The sealing assembly further comprises: an open positioning ring abutting against the spline sleeve assembly, and a butterfly spring and a metal sliding ring are sequentially arranged between the open positioning ring and the self-lubricating pressing ring.
3. The extruder shaft end seal structure of claim 1 wherein: The sealing installation hole is slightly larger than the staggered sleeve ring, so that a sealing gap groove is formed outside the staggered sleeve ring.
4. The extruder shaft end seal structure of claim 3, wherein: The rear end of the dustproof sleeve is provided with a protrusion extending rearward, and the dustproof baffle ring is correspondingly provided with a groove for accommodating the protrusion, and the groove is further provided with a dustproof sealing ring.
5. The extruder shaft end seal structure of claim 1 wherein: The spline sleeve assembly is further sleeved with a shell.