Wear-resistant ring friction pair
By using hard alloy and carbon copper alloy materials on the friction surfaces of the fixed ring and the moving ring respectively, the problems of short service life and high cost of wear-resistant ring friction pairs are solved, achieving long service life and low cost of wear-resistant ring friction pairs, which are suitable for the sealing requirements of internal mixers.
Patent Information
- Application Number
- CN202423258421.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-30
- Publication Date
- 2026-02-06
- Estimated Expiration
- 2034-12-30
AI Technical Summary
Existing wear-resistant ring friction pairs have a short service life and high cost, especially carbon-carbon materials, which are too expensive, and oil-free sealing rings are complex and expensive to design.
The friction surface of the fixed ring is made of cemented carbide, and the friction surface of the movable ring is made of carbon-copper alloy. The cemented carbide is a crack-free medium-carbon high-chromium material with a density of 4 g/cm3, a hardness of HB9-12, a carbon content of 0.8-1.2%, and a chromium content of ≥13%. The wear-resistant ring friction pair is formed by integral die casting in powder metallurgy and machining.
It extends the service life of the wear-resistant ring friction pair to 3-5 years, reduces costs, and maintains good performance under oil-free conditions. It is suitable for internal mixers used in general rubber compound processing and oil-free rubber compound refining.
Smart Images
Figure CN223881711U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to sealing technical field of internal mixer, specifically is a wear -resisting ring friction pair. BACKGROUND
[0002] The rotor end sealing part of the internal mixer is generally a pair of round wear -resisting rings, which are in close contact with each other by using a part of the plane under the action of spring mechanical force or hydraulic force, sealed between the round wear -resisting plate and the rotor shaft, so as to prevent the leakage of rubber and carbon black from the gap.
[0003] There are several types of sealing rings on the market at present:
[0004] I. The hard alloy layer of the same wear resistance is stacked on the friction surface of the two rings, and the friction pair is formed by the two alloy surfaces;
[0005] II. One ring is wear -resisting hard alloy, and the other matched ring is copper alloy;
[0006] III. One ring is a hard alloy friction pair surface, and the other ring is carbon carbon material;
[0007] The three types are the most widely used on the market at present, and the first two have the shortcomings of limited service life, generally 1-2 years, and the latter uses medical rubber without oil or reduces lubricating oil, but the cost is high. INVENTION CONTENTS
[0008] The technical problem to be solved by the utility model is to provide a wear -resisting ring friction pair.
[0009] The technical solution adopted by the utility model to solve the technical problem is:
[0010] A wear -resisting ring friction pair, comprising a fixed ring and a movable ring, the friction surface of the fixed ring is a hard alloy material, and the friction surface of the movable ring is a carbon copper alloy material, wherein the hard alloy material is a crack-free medium-carbon high-chromium material, and the carbon copper alloy material has a density of 4g / cm3 and a hardness of HB9-12.
[0011] In one embodiment, the carbon content in the carbon copper alloy material is 0.8-1.2.
[0012] In one embodiment, the chromium content in the carbon copper alloy material is greater than or equal to 13.
[0013] Compared with the prior art, the utility model has the beneficial effects as follows:
[0014] The utility model discloses a fixed ring's friction surface is hard alloy material, and the friction surface of movable ring is carbon copper alloy material, wherein, the hard alloy material is the high chromium material of medium carbon without crack, the density of carbon copper alloy material is 4g / cm3, and the hardness is HB9-12, the carbon content in carbon copper alloy material is 0.8-1.2, and the chromium content is more than or equal to 13, thereby making the service life of the utility model reach 3-5 years, and the cost is lower than carbon material, and the use effect reaches the level of carbon material. BRIEF DESCRIPTION OF DRAWINGS
[0015] Figure 1 It is the structural schematic diagram of the utility model embodiment 1.
[0016] In the drawing: 10, fixed ring, 20, movable ring. PREFERRED EMBODIMENT
[0017] The utility model is further explained below in connection with the drawings and embodiment. Embodiment 1
[0018] As shown in the drawing, the embodiment includes fixed ring 10, movable ring 20, and the friction surface of fixed ring 10 is hard alloy material, and the hard alloy material is high chromium material of medium carbon without crack, wherein the carbon content in carbon copper alloy material is 0.8-1.2, and the chromium content is more than or equal to 13. Figure 1 In the embodiment, fixed ring 10 adopts hard wear-resistant alloy on the friction pair surface, and reaches the standard size requirement by machining.
[0019] The friction surface of movable ring 20 is carbon copper alloy material, the density of carbon copper alloy material is 4g / cm3, and the hardness is HB9-12, and the carbon copper alloy material has self-lubricating property, and simultaneously because the strength and toughness of copper as matrix are higher than carbon material, it is easy to process, and it is not easy to damage in use, thereby prolonging the service life.
[0020] In the embodiment, movable ring 20 is integrally pressure-cast by powder metallurgy, and then is machined to reach the standard size, and when using, is installed in pairs to form standard friction pair.
[0021] Therefore, the utility model's wear-resistant ring friction pair is matched by two different performance materials, forms good working condition environment, and improves the service life of friction pair, and can be applied to general rubber processing internal mixer, and simultaneously because of the self-lubricating property of carbon copper material, can also be used for the internal mixer of oil-free rubber material preparation.
[0022]
[0023] It should be finally pointed out that: the above examples are only used to illustrate the technical solutions of the present application, and not to limit them; although the technical solutions of the present application are described in detail with reference to the foregoing examples, those skilled in the art should understand that they can still modify the technical solutions recorded in the foregoing examples, or make equivalent replacement for part of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.
Claims
1. A wear resistant ring friction pair, characterized by: The application relates to a fixed ring (10) and a movable ring (20), wherein the friction surface of the fixed ring (10) is made of a non-cracked medium-carbon high-chromium material, and the friction surface of the movable ring (20) is made of a carbon-copper alloy material, the density of the carbon-copper alloy material is 4 g / cm3, the hardness of the carbon-copper alloy material is HB9-12, and the carbon-copper alloy material has self-lubricating properties.