Search

CN-121973107-A - Corrosion-resistant and wear-resistant liquid slip ring for precise grinding and polishing

CN121973107ACN 121973107 ACN121973107 ACN 121973107ACN-121973107-A

Abstract

The invention relates to the technical field of grinding and polishing, in particular to a corrosion-resistant and wear-resistant liquid slip ring for precise grinding and polishing. The slip ring comprises a stationary part and a rotating part made of polyether ether ketone, and a wear-resistant sealing assembly comprising a zirconia ceramic wear-resistant spacer and a fluororubber seal. The PEEK material is adopted for all the overcurrent parts, so that the pollution of metal ions to the grinding fluid is thoroughly eliminated, the high-hardness and high-finish ceramic wear-resistant spacer bush is used as a core revolute pair, the wear resistance of wear particles is greatly improved, a multi-layer sealing protection system consisting of static sealing, fluororubber skeleton oil sealing dynamic sealing and an auxiliary isolation structure consisting of micro gaps is constructed, particles can be effectively retarded, impact is buffered, and long-term, stable and clean grinding fluid transmission under the working conditions of strong corrosion and high wear is ensured.

Inventors

  • SHI JIANHUA
  • ZHENG YUN
  • TAN ZHIXIAN
  • ZHANG HONGCHAO
  • TAN ZHIQIANG

Assignees

  • 深圳西可实业有限公司

Dates

Publication Date
20260505
Application Date
20260313

Claims (10)

  1. 1. A corrosion-resistant and wear-resistant liquid slip ring for precision lapping and polishing, comprising: The static part comprises a slip ring outer sleeve (5), a bearing spacer (7) and a sealing spacer ring (4), wherein the slip ring outer sleeve (5), the bearing spacer (7) and the sealing spacer ring (4) are all made of corrosion-resistant high-performance engineering polymers; The rotating component comprises a slip ring central shaft (1) and a ceramic spacer pressing ring (6), wherein the slip ring central shaft (1) and the ceramic spacer pressing ring (6) are both made of the high-performance engineering polymer, an expansion flange plate (11) for connecting external rotating equipment is arranged at the first end of the slip ring central shaft (1), the slip ring central shaft (1) is rotatably arranged in a slip ring outer sleeve (5) in a penetrating manner, and forms a rotating support with the slip ring outer sleeve (5) through a first bearing (8), and the ceramic spacer pressing ring (6) is fixedly connected with the slip ring central shaft (1) and forms a rotating support with a bearing spacer (7) through a second bearing (9); The wear-resistant sealing assembly comprises a ceramic wear-resistant spacer bush (2) and at least one fluororubber skeleton oil seal (3), wherein the ceramic wear-resistant spacer bush (2) is sleeved and fixed on the slip ring central shaft (1) and is positioned in the slip ring outer sleeve (5), a static sealing piece (10) is arranged between the inner wall of the ceramic wear-resistant spacer bush (2) and the outer wall of the slip ring central shaft (1), the fluororubber skeleton oil seal (3) is arranged between the outer wall of the ceramic wear-resistant spacer bush and the inner wall of the slip ring outer sleeve (5) to form dynamic seal, and the sealing spacer bush (4) is positioned in the slip ring outer sleeve (5) and is used for separating adjacent fluororubber skeleton oil seals (3); the sliding ring comprises a sliding ring central shaft (1), a sliding ring sleeve (5) and a ceramic wear-resistant spacer sleeve (2), wherein a fluid channel (13) penetrating through a first end and a side wall of the sliding ring central shaft is arranged in the sliding ring central shaft (1), a fluid outlet on the side wall of the sliding ring central shaft (1) corresponds to an annular groove (14) formed in the ceramic wear-resistant spacer sleeve (2), and a radial static fluid interface (12) corresponding to the annular groove in position is arranged on the side wall of the sliding ring sleeve (5).
  2. 2. The corrosion and wear resistant liquid slip ring for precision grinding and polishing of claim 1, wherein said high performance engineering polymer is polyetheretherketone.
  3. 3. The corrosion and wear resistant liquid slip ring for precision grinding and polishing according to claim 1, characterized in that the ceramic wear resistant spacer (2) is made of zirconia ceramic.
  4. 4. The anti-corrosion and wear-resistant liquid slip ring for precision grinding and polishing according to claim 1, characterized in that the static seal (10) is a fluororubber O-ring.
  5. 5. The corrosion and wear resistant liquid slip ring for precision lapping and polishing as claimed in claim 1, 2 or 4, wherein the number of said fluororubber skeleton oil seals (3) is two, and said seal spacer ring (4) is disposed between two of said fluororubber skeleton oil seals (3).
  6. 6. The corrosion and wear resistant liquid slip ring for precision grinding and polishing according to claim 1, wherein a radial revolute pair is formed between the inner hole surface of the ceramic wear resistant spacer (2) and the outer wall of the slip ring central shaft (1).
  7. 7. The corrosion and wear resistant liquid slip ring for precision grinding and polishing according to claim 1 or 6, wherein the ceramic wear resistant spacer (2) is fixed to the outer wall of the slip ring central shaft (1) through at least one static sealing member (10), and one axial end of the ceramic wear resistant spacer is limited by the shaft shoulder of the slip ring central shaft (1), and the other axial end of the ceramic wear resistant spacer is pressed and fixed by the ceramic spacer pressing ring (6).
  8. 8. The corrosion and wear resistant liquid slip ring for precision grinding and polishing according to claim 1, wherein a port at the first end of the slip ring central shaft (1) is connected with a second PFA flared outer tooth direct joint (16), and a radial static fluid interface (12) of the slip ring outer sleeve (5) is connected with a first PFA flared outer tooth direct joint (15).
  9. 9. The corrosion-resistant and wear-resistant liquid slip ring for precision grinding and polishing according to claim 1, wherein a micro gap serving as an auxiliary isolation structure is formed between the slip ring central shaft (1) and the ceramic wear-resistant spacer bush (2) and is used for blocking particles in grinding liquid from passing through so as to reduce direct impact of high-pressure grinding liquid on the fluororubber framework oil seal (3).
  10. 10. The anti-corrosion and wear-resistant liquid slip ring for precision grinding and polishing according to claim 1, characterized in that the first bearing (8) and the second bearing (9) are deep groove ball bearings.

Description

Corrosion-resistant and wear-resistant liquid slip ring for precise grinding and polishing Technical Field The invention relates to the technical field of grinding and polishing, in particular to a corrosion-resistant and wear-resistant liquid slip ring for precise grinding and polishing. Background In the ultra-precise grinding and polishing process of materials such as glass, ceramics, sapphire, semiconductors and metals, chemical grinding liquid containing nano-sized abrasive materials (such as silicon dioxide, diamond and cerium oxide) and strong acid and alkali (such as hydrofluoric acid and sodium hydroxide) needs to be continuously and stably conveyed to a processing area. The process relies on a liquid slip ring to achieve dynamic transfer of the grinding fluid from the stationary pipe to the high speed rotating spindle. At present, the current liquid slip ring on the market mostly adopts metal materials such as stainless steel, copper alloy and the like for the overcurrent part, and standard rubber is adopted for the sealing element. When used in the aforementioned precision processes, such slip rings have two major drawbacks: The corrosion resistance is insufficient, and the highly corrosive grinding fluid can erode the metal runner and the sealing material to generate metal ion pollutants. After the pollutants are mixed into the grinding fluid, scratches and chemical pollution can be caused to the surface of the processed workpiece, so that the yield of the product is suddenly reduced and even the product is scrapped in batches. At the same time, corrosion can also cause leakage and seizing of the slip ring itself to fail. The wear resistance is poor, and the nano hard particles in the grinding fluid can generate severe abrasive particle abrasion on the sealing surface under high pressure. The traditional sealing material wears rapidly, so that the sealing gap is increased, the leakage amount is increased, the flow and pressure parameters of the grinding fluid transmission drift, the stability and uniformity required by the process cannot be maintained, and the processing precision is directly affected. Therefore, a special liquid slip ring capable of fundamentally solving the problems of corrosion pollution and abrasive wear and realizing ultra-clean, long-life and high-stability transmission is needed. Disclosure of Invention The invention aims to overcome the defects of the prior art, provides a corrosion-resistant wear-resistant liquid slip ring for precise grinding and polishing, and aims at thoroughly eliminating metal ion pollution in the process of grinding liquid transmission, greatly improving the service life and operation stability of the slip ring under the working conditions of strong corrosion and high wear, and realizing low residue and easy maintenance of a flow passage. In order to achieve the above purpose, the present invention adopts the following technical scheme: a corrosion and wear resistant liquid slip ring for precision lapping and polishing includes a stationary component, a rotating component, and a wear resistant seal assembly. The stationary components include a slip ring jacket, bearing spacers, and seal spacer rings, all of which are made of a corrosion resistant high performance engineering polymer such as polyetheretherketone PEEK. The rotating component comprises a slip ring central shaft and a ceramic spacer pressing ring, and the slip ring central shaft and the ceramic spacer pressing ring are also made of the high-performance engineering polymer. The slip ring central shaft is rotatably arranged in the slip ring outer sleeve in a penetrating manner, and forms a rotary support with the slip ring outer sleeve through the first bearing. The ceramic spacer bush is fixedly connected with the slip ring central shaft and forms a rotary support with the bearing spacer bush through the second bearing. The wear-resistant sealing component comprises a ceramic wear-resistant spacer bush and at least one fluororubber framework oil seal. The ceramic wear-resistant spacer bush is sleeved and fixed on the slip ring central shaft and is positioned in the slip ring outer sleeve. A static sealing element (such as a fluororubber O-shaped ring) is arranged between the inner wall of the ceramic wear-resistant spacer bush and the outer wall of the slip ring central shaft, and the fluororubber framework oil seal is arranged between the outer wall of the ceramic wear-resistant spacer bush and the inner wall of the slip ring outer sleeve so as to form dynamic seal. The seal spacer ring is positioned in the slip ring jacket and used for separating the adjacent fluororubber framework oil seals. The slip ring is characterized in that a fluid channel penetrating through the end part and the side wall of the slip ring is arranged in the slip ring central shaft, and an outlet on the side wall of the channel corresponds to an annular groove formed in the ceramic wear-resistant spacer bush.