A spiral pusher spindle structure for a horizontal screw machine
Through the auger mandrel structure composed of column spiral, conical spiral and partition, the problems of material counterflow and accumulation are solved, the rigidity and stability of the equipment are improved, and the service life is extended.
Patent Information
- Application Number
- CN202010337844.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2020-04-26
- Publication Date
- 2024-12-10
- Estimated Expiration
- 2040-04-26
AI Technical Summary
In a scattering centrifuge, the material flows back into the space on the auger mandrel and the outside of the cloth device, resulting in the failure of bearing seal, accumulation of material, increase of eccentricity and vibration, affecting the life of the equipment.
Adopt the spindle structure of the spiral spiral, conical spiral and partition. The partition is arranged along the inner wall of the spiral to prevent material from flowing backflow, and excessive material is processed through the conical surface structure and groove design to reduce counterflow and accumulation of materials. .
Effectively prevent material backflow, reduce material accumulation, improve mandrel rigidity, reduce equipment operating load and vibration, and extend equipment life.
Smart Images
Figure CN111420811B_ABST
Abstract
Description
Technical Field
[0001] The invention relates to a spindle structure of a screw pusher of a horizontal screw machine, in particular to a new spindle structure, belonging to the technical field of engineering machinery. Background Art
[0002] The horizontal screw centrifuge is a horizontal spiral unloading, continuously operated sedimentation equipment. Its working principle is that the drum and the screw pusher rotate at high speed in the same direction with a certain speed difference. The material is continuously introduced into the feeding bin of the screw pusher through the feed pipe, and enters the drum after acceleration. Under the action of centrifugal force, the heavier solids are deposited on the drum wall to form a sediment layer. The screw pusher continuously pushes the deposited solid phase to the cone end of the drum and pushes it out of the machine through the slag outlet. Among them, the feeding method adopts the feeding from the small end of the screw pusher. This method can reduce the length of the feed pipe and avoid the breakage of the feed pipe, but it will cause some materials to flow back into the space between the outer side of the distributor and the screw pusher mandrel to produce a large amount of material accumulation, thereby causing the small end bearing seal of the screw pusher to fail and cause the bearing to be damaged after the material is fed; at the same time, the accumulated large amount of material will cause the screw pusher to produce eccentric force, increase the operating load and vibration intensity of the centrifuge, and affect the service life of the equipment. Summary of the invention
[0003] The technical problem to be solved by the present invention is to prevent the material from backflowing into the space between the outer side of the distributor and the screw pusher spindle, and to provide a novel screw pusher spindle structure.
[0004] The present invention adopts the following technical scheme to solve the above technical problems: a spiral pusher spindle structure of a horizontal screw machine, which is composed of a column spiral, a cone spiral and a partition. The material to be separated enters the distribution bin from the spiral pusher through a feed pipe installed on an external bearing seat. The spiral pusher is divided into a large end and a small end according to its outer diameter size. The feed pipe enters the distribution bin from the small end of the spiral pusher. It is characterized in that the distribution bin is an inner cavity formed by the cone spiral, the column spiral and the partition of the spiral pusher. The three are connected in sequence along the feeding direction of the material. The partition is arranged along the circumferential direction of the inner wall of the column spiral. The diaphragm is provided with a protrusion toward the feed pipe that can make the material rebound and prevent the backflow from entering the cone spiral. A first outlet connected to the distribution bin is provided along the circumference of the column spiral. The large end of the cone spiral adopts a conical surface structure, which is a part of the cone spiral. Since the material has a certain speed when entering the distribution bin from the feed pipe, most of the material will enter the drum from the first outlet after rebounding from the diaphragm, but a small part will still rebound back to the cone spiral. This part will flow back to the distribution bin along the cone spiral conical surface under the action of centrifugal force, and then enter the drum from the first outlet. If the feed amount exceeds the rated processing capacity of the horizontal screw machine, it is considered that the feed amount is too large, and there are too many rebounding materials to flow back to the distribution bin along the conical surface in time. The material exceeding the rated processing capacity of the horizontal screw machine crosses the conical surface and flows in the reverse direction of the feed. The cone spiral is provided with two grooves near the conical surface and a second outlet is symmetrically provided in the middle of the groove to prevent a small amount of backflow material from accumulating. A small amount of backflow material will enter the drum from the second outlet.
[0005] Furthermore, the protrusion of the partition has a length of 65 mm, and there is a smooth transition between the protrusion and the end surface of the partition, with an arc of R45 mm.
[0006] Furthermore, the first outlet is eight openings arranged in an annular direction along the circumference of the column spiral body to ensure that the material can be quickly separated and discharged when the spiral pusher rotates.
[0007] Furthermore, the top end of the protrusion extends into the lower end of the first outlet, and the extension length is 15 mm.
[0008] Furthermore, the second outlets are evenly distributed along the circumference of the middle of the cone spirochete groove, and the number of the second outlets is at least eight.
[0009] Furthermore, the conical spiral body and the conical plate are integrally formed, thereby avoiding the formation of a material accumulation space and improving the rigidity of the mandrel.
[0010] The invention reduces the number of parts, has a simple structure, and reduces costs; improves the rigidity of the spiral mandrel and reduces welding deformation; eliminates material accumulation space, reduces material backflow and can promptly remove a small amount of backflow material, prevents the generation of eccentric force, reduces the operating load and vibration intensity of the centrifuge, and prolongs the service life of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS
[0011] Figure 1 This is a schematic diagram of the original spiral pusher shaft structure.
[0012] Description of the drawings: 1 column spiral, 2 partition, 3 outlet, 4 cone plate, 5 outlet, 6 cone spiral, 7 feed pipe.
[0013] Figure 2 It is a schematic diagram of the structure of the spiral pusher spindle of the present invention.
[0014] Description of the drawings: 1 column spiral, 2 partition, 3 outlet, 4 cone spiral, 5 outlet, 6 feed pipe. DETAILED DESCRIPTION
[0015] The technical solution of the present invention is further described in detail below in conjunction with the accompanying drawings:
[0016] The invention provides a novel spiral pusher spindle structure.
[0017] like Figure 1 When the material with a certain flow rate enters the distribution bin from the feed pipe 7, the distribution bin is formed by the column spiral 1, the partition 2, and the cone plate 4. Most of the material enters the inner wall of the drum from the outlet 3 for separation. A small part of it will flow back into the cone spiral 6 due to the rebound of the partition 2, and most of it will enter the drum from the outlet 5. Since there are only four outlets 5 evenly distributed on the circumference, some materials will still accumulate in the material accumulation space formed by the outer side of the cone plate 4 and the cone spiral 6 after long-term use, which will cause the spiral pusher to generate eccentric force. In addition, due to the existence of the outlet 5, the rigidity and natural frequency of the spindle will be reduced. These problems will increase the operating load and vibration intensity of the centrifuge and affect the service life of the equipment.
[0018] like Figure 2 The improved screw pusher mandrel has the following advantages: first, the structure of the partition plate 2 is improved, so that most of the materials rebound and enter the outlet 3, and the material backflow into the cone spiral is minimized; second, the cone plate and the cone spiral are made into one piece, which not only avoids the formation of material accumulation space, but also reduces the number of outlets and improves the rigidity of the mandrel. A very small amount of backflow material will also be discharged from the outlet 5. This improves the operating stability of the screw pusher, and improves the performance and service life of the entire equipment.
[0019] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above specific embodiments. The above specific embodiments and the description in the specification are only for further illustrating the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of the present invention to be protected is defined by the claims and their equivalents.
Claims
1. A spiral pusher spindle structure of a horizontal screw machine, which is composed of a column spiral, a conical spiral and a partition. The material to be separated enters the distribution bin from the spiral pusher through a feed pipe installed on an external bearing seat. The spiral pusher is divided into a large end and a small end according to its outer diameter. The feed pipe enters the distribution bin from the small end of the spiral pusher, characterized in that: The material distribution bin is an inner cavity formed by the conical spiral body, columnar spiral body and partition of the spiral pusher, and the three are connected in sequence along the feeding direction of the material. The partition is arranged along the circumferential direction of the inner wall of the columnar spiral, and the partition has a protrusion facing the feeding pipe that can make the material rebound and prevent backflow into the conical spiral body. The protrusion length of the partition is 65mm, and there is a smooth transition between the protrusion and the end face of the partition, and the curvature is R45mm; a first outlet connected to the material distribution bin is arranged along the circumference of the columnar spiral, and the first outlet is eight openings arranged in an annular direction along the circumference of the columnar spiral to ensure that the spiral pusher rotates The material can be quickly separated and discharged, and the top of the protrusion extends into the lower end of the first outlet with a length of 15 mm; the large end of the conical spiral adopts a conical surface structure, and the conical surface structure is a part of the conical spiral. If the feed amount exceeds the rated processing capacity of the horizontal screw machine, it is considered that the feed amount is too large, and there are too many rebound materials to return to the distribution bin along the conical surface in time. The material exceeding the rated processing capacity of the horizontal screw machine crosses the conical surface and flows in the reverse direction of the feed. The conical spiral is provided with two sections of grooves near the conical surface and symmetrically arranged in the middle of the grooves to prevent the accumulation of a small amount of countercurrent material. A small amount of countercurrent material will enter the drum from the second outlet.
2. The spindle structure of the screw pusher of the horizontal screw machine according to claim 1, characterized in that: The second outlets are evenly distributed along the circumference of the middle of the cone spirochete groove, and the number of the second outlets is at least eight.
3. The spindle structure of the screw pusher of the horizontal screw machine according to claim 1, characterized in that: The conical spiral body and the conical plate are formed in one piece, thereby avoiding the formation of a material accumulation space and improving the rigidity of the mandrel.