Sealing structure for mixer

Abstract

The utility model provides a sealing structure for a mixer. The sealing structure comprises a rotating shaft, a bushing, a sealing seat, a sealing ring, a packing and a pressing seat, the bushing is fixed on the peripheral surface of the sealing section of the rotating shaft through a fastener; the sealing seat sleeves one end, far away from the end part of the rotating shaft, of the bushing, and a sealing ring and packing are arranged between the bushing and the sealing seat; the pressing seat is arranged at one end, close to the end part of the rotating shaft, of the bushing in a sleeving manner and is fixedly connected with the sealing seat through a fastener, and one end surface of the pressing seat is propped against the packing; multiple seals are formed among the bushing, the sealing ring and the packing, so that small particle materials can be effectively prevented from entering the rotating shaft, the abrasion and damage of the rotating shaft are reduced, and the service life of equipment is prolonged; the sealing ring and the packing are combined for use, so that the sealing effect is improved; meanwhile, the packing can be further pressed by adjusting the distance between the pressing seat and the sealing seat, so that after the packing is abraded, abrasion can be compensated by adjusting the pressing seat, and continuous sealing is ensured.

Description

Technical Field

[0001] The present application relates to the technical field of stirring equipment, and in particular to a sealing structure for a mixer. Background Art

[0002] Mixers are widely used in industries such as chemical, pharmaceutical, and food processing to mix and stir various raw materials. When mixing small particles, due to their small size, they can easily enter the agitator's rotating seal during the mixing process. Therefore, strict sealing requirements are placed on the agitator's rotating shaft to prevent small particles from entering the shaft and causing damage to the shaft and its sealing structure. To overcome this problem, a reliable sealing structure is needed that can effectively prevent small particles from entering the rotating seal during the mixing process. Utility Model Content

[0003] In order to solve the above technical problems, the present application provides a sealing structure for a mixer, including a rotating shaft, a bushing, a sealing seat, a sealing ring, a packing, and a compression seat; the rotating shaft is a stepped shaft and includes sealing sections located at both ends; the bushing is fixed on the outer circumferential surface of the rotating shaft sealing section by fasteners; the sealing seat is sleeved at one end of the bushing away from the end of the rotating shaft, and a sealing ring and a packing are provided between the bushing and the sealing seat; the compression seat is sleeved at one end of the bushing close to the end of the rotating shaft, and is fixed to the sealing seat by fasteners, and one end face of the compression seat abuts against the packing.

[0004] In some embodiments of the present application, a plurality of packings are arranged side by side and an oil guide ring is provided in the middle of the packing; a first oil guide groove is provided on the circumferential surface of the sealing seat, so that lubricating oil can be injected into the contact surface of the packing and the bushing through the first oil guide groove and the oil guide ring.

[0005] In some embodiments of the present application, a pressure cover is further included, which is sleeved on the bushing and fastened to the other end face of the pressing seat.

[0006] In some embodiments of the present application, a sealing ring is further provided between the pressure cover and the pressing seat.

[0007] In some embodiments of the present application, a second oil guide groove is provided on the circumferential surface of the pressing seat.

[0008] In some embodiments of the present application, a retaining ring and a skeleton seal are further included. The retaining ring and the skeleton seal are sequentially sleeved on the outer circumference of the sealing seat, and the skeleton seal is fastened to the retaining ring and the sealing seat respectively through fasteners.

[0009] In some embodiments of the present application, an end cap is further included, and the end cap is fastened to the end of the skeleton seal.

[0010] In some embodiments of the present application, a first packing, a second packing, a third packing and a fourth packing are included, and the first packing, the second packing, the third packing, the oil guide ring and the fourth packing are arranged in sequence along the axial direction of the rotating shaft.

[0011] Compared with the prior art, the present invention has the following advantages and beneficial effects: the sealing structure for a mixer of the present application includes a rotating shaft, a bushing, a sealing seat, a sealing ring, a packing, and a pressing seat; the bushing is fixed to the outer peripheral surface of the sealing section of the rotating shaft by a fastener; the sealing seat is provided at one end of the bushing away from the end of the rotating shaft, and a sealing ring and a packing are provided between the bushing and the sealing seat; the pressing seat is provided at one end of the bushing close to the end of the rotating shaft and is fixed to the sealing seat by a fastener, and one end face of the pressing seat abuts against the packing; its beneficial effects are as follows:

[0012] 1. Multiple seals are formed between the bushing, sealing ring and packing, which improves the sealing effect and can effectively prevent small particles from entering the sealing structure, thereby reducing wear and damage to the rotating shaft and extending the service life of the equipment.

[0013] 2. The compression seat is located at one end of the bushing near the end of the rotating shaft and is fixed to the sealing seat by fasteners. One end face of the compression seat abuts against the packing. The distance between the compression seat and the sealing seat can be adjusted to further compress the packing. When the packing is worn, the compression seat can be adjusted to compensate for the wear and ensure continuous sealing.

[0014] 3. By adjusting the compression seat to compress the packing, the service life of the packing can be extended, frequent replacement of packing can be avoided, maintenance costs can be reduced, and the operation stability and production efficiency of the equipment can be improved.

[0015] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The accompanying drawings, which constitute part of this document, are intended to provide a further understanding of this document. The exemplary embodiments and descriptions herein are intended to explain this document and do not constitute an improper limitation on this document. In the accompanying drawings:

[0017] Figure 1 This is a front view of a sealing structure for a mixer provided by an exemplary embodiment of the present application;

[0018] Figure 2 is a top view of a sealing structure for a mixer provided by an exemplary embodiment of the present application;

[0019] Figure 3yes Figure 2 Cross-sectional view at AA in the middle;

[0020] Figure 4 yes Figure 3 Enlarged image in the middle circle.

[0021] In the picture:

[0022] 101. Rotating shaft; 102. Bushing; 103. Sealing seat; 104. Sealing ring; 105. Packing; 106. Holding seat; 107. Oil guide ring; 108. First oil guide groove; 109. Gland; 110. Second oil guide groove; 111. Retaining ring; 112. Frame seal; 113. End cover. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application. It should be noted that, in the absence of conflict, the embodiments in the present application and the features in the embodiments can be combined with each other in any way.

[0024] Mixers are widely used in industries such as chemical, pharmaceutical, and food processing to mix and stir various raw materials. When mixing small particles, due to their small size, they can easily enter the agitator's rotating seal during the mixing process. Therefore, strict sealing requirements are placed on the agitator's rotating shaft to prevent small particles from entering the shaft and causing damage to the shaft and its sealing structure. To overcome this problem, a reliable sealing structure is needed that can effectively prevent small particles from entering the rotating seal during the mixing process.

[0025] Based on this, an exemplary embodiment of the present application provides a sealing structure for a mixer, which includes a rotating shaft, a bushing, a sealing seat, a sealing ring, a packing, and a compression seat; the bushing is fixed to the outer peripheral surface of the sealing section of the rotating shaft by fasteners; the sealing seat is sleeved at one end of the bushing away from the end of the rotating shaft, and a sealing ring and a packing are arranged between the bushing and the sealing seat; the compression seat is sleeved at one end of the bushing close to the end of the rotating shaft, and is fixed to the sealing seat by fasteners, and one end face of the compression seat abuts against the packing; multiple seals are formed between the bushing, the sealing ring and the packing, which can effectively prevent small particles from entering the interior of the rotating shaft, reduce wear and damage to the rotating shaft, and extend the service life of the equipment; the combined use of the sealing ring and the packing improves the sealing effect.

[0026] An exemplary embodiment of the present application provides a sealing structure for a mixer, such as Figures 1 to 4 As shown, the sealing structure includes a rotating shaft 101, a bushing 102, a sealing seat 103, a sealing ring 104, a packing 105, and a pressing seat 106; the rotating shaft 101 is a stepped shaft and includes sealing sections at both ends, the diameter of the sealing section is smaller than that of the middle section, and the sealing structure is provided on the sealing sections at both ends of the rotating shaft 101. The middle section of the rotating shaft 101 is located in the agitator, and a stirring blade is installed on it. One end of the rotating shaft 101 is connected to the driving unit for transmission. In this way, under the action of the driving unit, the rotating shaft 101 can drive the stirring blade to rotate so as to stir the mixed material.

[0027] To ensure a tight fit between bushing 102 and rotating shaft 101, bushing 102 is secured to the outer circumference of the sealing section of rotating shaft 101 via fasteners. For example, a threaded hole perpendicular to the axis of rotating shaft 101 is provided on the circumferential surface of bushing 102, and a set screw is installed in the threaded hole and presses against the outer circumference of rotating shaft 101. A sealing seat 103 is mounted on the end of bushing 102 away from the end of rotating shaft 101. A sealing ring 104 and a packing 105 are positioned between bushing 102 and sealing seat 103. For example, sealing ring 104 is positioned on the side near the middle section of rotating shaft 101, and packing 105 is positioned on the side away from the middle section of rotating shaft 101. This creates multiple seals between bushing 102, sealing ring 104, and packing 105, enhancing the sealing effect and effectively preventing small particles from entering the sealing structure. This reduces wear and damage to rotating shaft 101 and extends the service life of the equipment.

[0028] like Figure 4 As shown, the compression seat 106 is sleeved on one end of the bushing 102 near the end of the rotating shaft 101 and is fixed to the sealing seat 103 by fasteners. One end face of the compression seat 106 abuts against the packing 105. After a period of use, if the packing 105 wears, the distance between the compression seat 106 and the sealing seat 103 can be adjusted to further compress the packing 105. When the packing 105 wears, the compression seat 106 can be adjusted to compensate for the wear and ensure continuous sealing. By adjusting the compression seat 106 so that the compression seat 106 compresses the packing 105, the service life of the packing 105 can be extended, frequent replacement of the packing 105 can be avoided, maintenance costs can be reduced, and the operating stability and production efficiency of the equipment can be improved.

[0029] In an exemplary embodiment, the sealing structure includes a plurality of packings 105 arranged side by side and an oil guide ring 107 arranged in the middle of the packing 105; a first oil guide groove 108 is opened on the circumferential surface of the sealing seat 103, and the position of the first oil guide groove 108 is adapted to the position of the oil guide ring 107. An oil cup is installed in the first oil guide groove 108, and lubricating oil can be injected into the first oil guide groove 108 and the oil guide ring 107 through the oil cup. After the lubricating oil melts, it will enter between the packing 105 and the bushing 102, so that the lubricating oil can be injected into the contact surface of the packing 105 and the bushing 102 through the first oil guide groove 108 and the oil guide ring 107, so as to reduce the friction between the packing 105 and the bushing 102 and reduce the wear of the packing 105. Specifically, the sealing structure includes a first packing 105, a second packing 105, a third packing 105, and a fourth packing 105. The first packing 105, the second packing 105, the third packing 105, the oil guide ring 107, and the fourth packing 105 are arranged in sequence along the axial direction of the rotating shaft 101. The oil guide ring 107 is disposed in the middle of the packing 105. Lubricating oil injected through the oil guide ring 107 can flow toward both ends of the oil guide ring 107, thereby fully lubricating the packings 105 on both sides of the oil guide ring 107.

[0030] In one embodiment, in order to achieve a better sealing effect, the sealing structure also includes a pressure cover 109, which is sleeved on the bushing 102 and fastened to the other end face of the compression seat 106. A sealing ring is also provided between the pressure cover 109 and the compression seat 106. In this way, the pressure cover 109, the compression seat 106 and the bushing 102 can be sealed to achieve a better sealing effect.

[0031] In one embodiment, a second oil guide groove 110 is provided on the circumferential surface of the pressing seat 106, and an oil cup is installed in the second oil guide groove 110. Lubricating oil can be injected into the second oil guide groove 110 through the oil cup, and the melted lubricating oil can enter between the pressing seat 106 and the bushing 102 to lubricate the contact surface of the bushing 102 and the pressing seat 106, thereby reducing the side friction between the two and reducing the wear between the two.

[0032] Continue to refer Figure 4 The sealing structure also includes a retaining ring 111 and a skeleton seal 112. The retaining ring 111 and the skeleton seal 112 are sequentially sleeved on the outer circumferential surface of the sealing seat 103. The skeleton seal 112 is fastened to the retaining ring 111 and the sealing seat 103 respectively by fasteners. The other end of the skeleton seal 112 is sleeved on the rotating shaft 101, and a sealing ring is provided to achieve a seal between the rotating shaft 101. At one end close to the end face of the rotating shaft 101, a bearing is further provided between the rotating shaft 101 and the skeleton seal 112 to reduce friction between the two. An end cover 113 is also provided on the end of the skeleton seal 112. The end cover 113 can seal the bearing and the end of the rotating shaft 101 to enhance the sealing effect.

[0033] In this application, the terms "comprises," "comprising," or any other variations thereof are intended to encompass non-exclusive inclusion, such that an article or device comprising a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such article or device. In the absence of further limitations, an element defined by the phrase "comprising..." does not exclude the presence of additional identical elements in the article or device comprising the element.

[0034] Although the preferred embodiments of the present application have been described, those skilled in the art may make additional changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the present application.

[0035] Obviously, those skilled in the art may make various changes and modifications to the present application without departing from the spirit and scope of the present application. Thus, if such changes and modifications of the present application fall within the scope of the claims of the present application and their equivalents, the present application is intended to include such changes and modifications.

Claims

1. A sealing structure for a mixer, characterized in that: It includes a rotating shaft, a bushing, a sealing seat, a sealing ring, a plurality of packings arranged side by side, an oil guide ring arranged in the middle of the packing, and a pressing seat; the rotating shaft is a stepped shaft and includes sealing sections at both ends; the bushing is fixed to the outer circumferential surface of the sealing section of the rotating shaft by fasteners; the sealing seat is sleeved at one end of the bushing away from the end of the rotating shaft, and a sealing ring and packing are arranged between the bushing and the sealing seat; a first oil guide groove is provided on the circumferential surface of the sealing seat, so that lubricating oil can be injected into the contact surface of the packing and the bushing through the first oil guide groove and the oil guide ring; the pressing seat is sleeved at one end of the bushing close to the end of the rotating shaft, and is fixed to the sealing seat by fasteners, and one end face of the pressing seat abuts against the packing.

2. The sealing structure for a mixer according to claim 1, wherein: It also includes a pressure cover, which is sleeved on the bushing and fastened to the other end surface of the pressing seat.

3. The sealing structure for a mixer according to claim 2, wherein: A sealing ring is further provided between the pressure cover and the pressing seat.

4. The sealing structure for a mixer according to claim 1, wherein: A second oil guide groove is provided on the circumferential surface of the pressing seat.

5. The sealing structure for a mixer according to claim 1, wherein: It also includes a retaining ring and a skeleton seal, which are sequentially sleeved on the outer circumference of the sealing seat, and the skeleton seal is fastened to the retaining ring and the sealing seat respectively through fasteners.

6. The sealing structure for a mixer according to claim 5, characterized in that: Also included is an end cap secured to the end of the skeleton seal.

7. The sealing structure for a mixer according to claim 1, wherein: The packing comprises a first packing, a second packing, a third packing and a fourth packing, wherein the first packing, the second packing, the third packing, the oil guide ring and the fourth packing are arranged in sequence along the axial direction of the rotating shaft.

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