Bearing structure after spiral discharging of horizontal scraper centrifugal machine

Abstract

The utility model relates to the field of horizontal type scraper centrifuges, and discloses a horizontal type scraper centrifuge spiral discharging rear bearing structure which comprises a sealing shaft sleeve installed at the discharging spiral combination shaft end and a bearing seat installed on a receiving hopper, a shaft hole is formed in the middle of the bearing seat, the sealing shaft sleeve penetrates through the shaft hole, and a wear-resisting layer is arranged on the outer circle face of the sealing shaft sleeve. A sealing piece and a non-metal wear-resistant shaft sleeve are arranged between the sealing shaft sleeve and the bearing seat, and the sealing piece is located between the non-metal wear-resistant shaft sleeve and the discharging spiral combination. The utility model can solve the problem that in the cleaning process of a horizontal scraper centrifuge in the prior art, washing liquor enters a bearing cavity through a mechanical seal and a contact seal, so that a spiral bearing is stuck and damaged.

Description

Technical Field

[0001] The utility model relates to the field of horizontal scraper centrifuges, in particular to a spiral unloading rear bearing structure of a horizontal scraper centrifuge. Background Art

[0002] The scraper centrifuge is a continuously running, intermittently discharging filtering centrifuge. Each working cycle of the machine includes: feeding, removing mother liquor, washing filter cake, removing washing liquid, unloading and other operations. In the starch industry, due to the presence of residual filter cake layer, the separation efficiency is reduced. Therefore, a large cleaning program needs to be enabled after a certain period of time. The washing liquid is discharged from the machine through the scraper and the unloading screw. During the discharge process, the washing liquid may enter the bearing cavity through the mechanical seal and contact seal, causing the spiral bearing to be stuck and damaged, resulting in a shorter service life of the spiral. Therefore, during the production process, the spiral bearing needs to be replaced from time to time, resulting in reduced production efficiency. Utility Model Content

[0003] The utility model aims to provide a bearing structure after spiral unloading of a horizontal scraper centrifuge, so as to solve the problem in the prior art that during the cleaning process of the horizontal scraper centrifuge, washing liquid enters the bearing cavity through the mechanical seal and the contact seal, causing the spiral bearing to be stuck and damaged.

[0004] To achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a horizontal scraper centrifuge spiral unloading rear bearing structure, including a sealing sleeve installed at the end of the unloading spiral assembly shaft and a bearing seat installed on the receiving hopper, an axial hole is provided in the middle of the bearing seat, the sealing sleeve passes through the axial hole, a wear-resistant layer is provided on the outer cylindrical surface of the sealing sleeve, a sealing member and a non-metallic wear-resistant sleeve are provided between the sealing sleeve and the bearing seat, and the sealing member is located between the non-metallic wear-resistant sleeve and the unloading spiral assembly.

[0005] Preferably, as an improvement, the sealing sleeve is connected and fixed to the shaft end face of the unloading spiral assembly by means of a fastener.

[0006] Preferably, as an improvement, the sealing sleeve is a sleeve with one end closed, and the closed end of the sealing sleeve is connected and fixed to the axial end face of the unloading spiral assembly by a fastener.

[0007] Preferably, as an improvement, the bearing seat is connected and fixed to the receiving hopper via fasteners.

[0008] Preferably, as an improvement, the wear-resistant layer is a nickel-based hard alloy spray layer spray-welded on the outer cylindrical surface of the sealing sleeve.

[0009] Preferably, as an improvement, the sealing member is a sealing ring.

[0010] The principle of this scheme is: in actual application, when the scraper centrifuge is cleaning the residual filter cake layer, the washing liquid is discharged from the machine through the scraper discharge through the receiving hopper and the discharge spiral combination. At this time, the sealing ring plays a sealing role and the washing liquid is isolated. Even if the sealing ring fails after long-term use, the washing liquid penetrates between the non-metallic wear-resistant sleeve and the nickel-based hard alloy spray layer. Since both are wear-resistant materials, they will not be stuck due to wear caused by particles in the washing liquid. The sealing sleeve, non-metallic wear-resistant sleeve and bearing seat can still maintain smooth rotation, and the discharge spiral combination can still rotate smoothly, ensuring that the machine can still operate normally, and will not be stuck and stopped quickly like the bearing structure.

[0011] The advantages of this solution include:

[0012] 1. Good sealing effect;

[0013] 2. Non-metallic wear-resistant sleeves are less valuable than bearings, which reduces the maintenance frequency and cost to a certain extent and improves production efficiency;

[0014] 3. Self-lubricating structure, no need to add grease, even if there is material entering, the unloading spiral combination can still operate normally. It is also corrosion-resistant, wear-resistant, and high-temperature resistant, and will not pollute materials. It can be widely used in food, chemical, pharmaceutical and other industries. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic structural diagram of an embodiment of the utility model. DETAILED DESCRIPTION

[0016] The following is further described in detail through specific implementation methods:

[0017] The reference numerals in the drawings of the specification include: a discharge screw assembly 1, a sealing sleeve 2, a sealing ring 3, a non-metallic wear-resistant sleeve 4, a receiving hopper 5, a bearing seat 6, and a wear-resistant layer 7.

[0018] Embodiment 1, basically as attached Figure 1 As shown: A horizontal scraper centrifuge spiral unloading rear bearing structure, including a sealing sleeve 2 installed on the axial end of the unloading spiral assembly 1 and a bearing seat 6 installed on the receiving hopper 5, the sealing sleeve 2 is a sleeve with one end closed, and the closed end of the sealing sleeve 2 is connected and fixed to the axial end face of the unloading spiral assembly 1 by bolts. The bearing seat 6 is connected and fixed to the receiving hopper 5 by bolts, and an axial hole is provided in the middle of the bearing seat 6, and the sealing sleeve 2 passes through the axial hole. The outer cylindrical surface of the sealing sleeve 2 is provided with a wear-resistant layer 7, and the wear-resistant layer 7 is a nickel-based hard alloy spray layer sprayed on the outer cylindrical surface of the sealing sleeve 2. A sealing ring 3 and a non-metallic wear-resistant sleeve 4 are provided between the sealing sleeve 2 and the bearing seat 6, and the sealing ring 3 is located between the non-metallic wear-resistant sleeve 4 and the unloading spiral assembly 1.

[0019] The specific implementation process is as follows: when the scraper centrifuge is cleaning the residual filter cake layer, the washing liquid is discharged from the machine through the scraper discharge through the receiving hopper 5 and the discharge spiral assembly 1. At this time, the sealing ring 3 plays a sealing role and the washing liquid is isolated. Even if the sealing ring 3 fails after long-term use, the washing liquid penetrates between the non-metallic wear-resistant sleeve 4 and the nickel-based hard alloy spray layer. Since both are wear-resistant materials, they will not be stuck due to wear caused by particles in the washing liquid. The sealing sleeve 2, the non-metallic wear-resistant sleeve 4 and the bearing seat 6 can still maintain smooth rotation, and the discharge spiral assembly 1 can still rotate smoothly, ensuring that the machine can still operate normally, and will not be stuck and stopped quickly like the bearing structure.

[0020] The above is only an embodiment of the utility model, and the common knowledge such as the known specific technical solutions and / or characteristics in the solution is not described in detail here. It should be pointed out that for those skilled in the art, without departing from the technical solution of the utility model, several deformations and improvements can be made, which should also be regarded as the protection scope of the utility model, and these will not affect the effect of the implementation of the utility model and the practicality of the patent. The scope of protection required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. A horizontal scraper centrifuge spiral unloading rear bearing structure, characterized in that: It includes a sealing sleeve installed at the end of the unloading screw assembly shaft and a bearing seat installed on the receiving hopper, an axial hole is provided in the middle of the bearing seat, the sealing sleeve passes through the axial hole, a wear-resistant layer is provided on the outer cylindrical surface of the sealing sleeve, a sealing member and a non-metallic wear-resistant sleeve are provided between the sealing sleeve and the bearing seat, and the sealing member is located between the non-metallic wear-resistant sleeve and the unloading screw assembly.

2. The rear bearing structure of a spiral unloading horizontal scraper centrifuge according to claim 1, characterized in that: The sealing sleeve is connected and fixed to the shaft end surface of the unloading spiral assembly through a fastener.

3. The rear bearing structure of the spiral unloading of a horizontal scraper centrifuge according to claim 2, characterized in that: The sealing sleeve is a sleeve with one end closed, and the closed end of the sealing sleeve is connected and fixed to the shaft end surface of the unloading spiral assembly through a fastener.

4. The rear bearing structure of the spiral unloading horizontal scraper centrifuge according to claim 3, characterized in that: The bearing seat is connected and fixed to the material receiving hopper via a fastener.

5. The rear bearing structure of the spiral unloading of a horizontal scraper centrifuge according to claim 4, characterized in that: The wear-resistant layer is a nickel-based hard alloy spray layer spray-welded on the outer cylindrical surface of the sealing sleeve.

6. The spiral unloading rear bearing structure of a horizontal scraper centrifuge according to claim 5, characterized in that: The sealing member is a sealing ring.

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