NGHIÊN CỨU ẢNH HƯỞNG CỦA HÌNH HỌC ỐNG MAO DẪN ĐẾN ÁP SUẤT Ổ THỦY TĨNH BẰNG PHƯƠNG PHÁP MÔ PHỎNG SỐ=INVESTIGATING THE INFLUENCE OF CAPILLARY TUBE GEOMETRY ON HYDROSTATIC HEAD PRESSURE USING NUMERICAL SIMULATIONS

0 Người đánh giá. Xếp hạng trung bình 0

Tác giả: Tuấn Anh Bùi, Quốc Dũng Nguyễn, Trọng Thanh Nguyễn, Thế Hùng Trần

Ngôn ngữ: vie

Ký hiệu phân loại:

Thông tin xuất bản: Tạp chí Khoa học & Công nghệ - Trường Đại học Công nghiệp Hà Nội, 2024

Mô tả vật lý: tr.94

Bộ sưu tập: Metadata

ID: 479319

Thêm vào giỏ

Cụm trục chính là bộ phận quan trọng trong máy công cụ, chịu trách nhiệm dẫn động và truyền lực cho dao cắt, đồng thời đảm bảo độ chính xác của quá trình gia công. Việc nghiên cứu và phát triển các công nghệ tiên tiến cho cụm trục chính là cần thiết để nâng cao hiệu suất và độ chính xác trong gia công cơ khí. Ổ thủy tĩnh, loại ổ đỡ sử dụng chất lỏng để giảm ma sát và mài mòn, có độ chính xác cao và khả năng chịu tải trọng lớn, được sử dụng rộng rãi trong các ứng dụng yêu cầu độ chính xác cao. Nghiên cứu này phân tích ảnh hưởng của hình học ống mao dẫn đến áp suất trong ổ thủy tĩnh bằng phương pháp mô phỏng số. Kết quả cho thấy tỷ số áp suất buồng dầu trên áp suất bơm giảm khi tỷ số lc/dc tăng, và β tăng khi đường kính ống mao dẫn dc tăng. Với phạm vi giá trị đường kính mao dẫn từ 0,3mm đến 0,6mm, có thểchọn được tỷ số mao dẫn lc/dc phù hợp với yêu cầu 0,4 <
β <
0,7. Cơ chế hình thành màng dầu bằng ống mao dẫn cho thấy các thông số hình học của ống mao dẫn có tác động trực tiếp đến tỷ lệ áp suất giữa buồng dầu và áp suất bơm để đảm bảo điều kiện làm việc, đặc biệt là giới hạn khe hở của ổ. Các cặp giá trị đường kính mao dẫn và tỷ số mao dẫn (dc
lc/dc) tương ứng là (0,3
33), (0,4
78), (0,5
152), (0,6
200) được xác định là thích hợp để đảm bảo khe hở của ổ trong giới hạn cho phép.Nghiên cứu này góp phần nâng cao hiểu biết về ảnh hưởng của hình học ống mao dẫn đến hiệu suất của ổ thủy tĩnh. Kết quả nghiên cứu có thể được sử dụng để thiết kế và tối ưu hóa các hệ thống ổ thủy tĩnh hiệu quả hơn, đặc biệt trong các ứng dụng đòi hỏi độ chính xác cao như máy mài tròn ngoài.The spindle unit is a critical component in machine tools, responsible for driving and transmitting power to the cutting tool while ensuring machining accuracy. Research and development of advanced technologies for spindle assemblies are essential to enhance performance and precision in mechanical processing. Hydrostatic bearings, which use liquid to reduce friction and wear, offer high accuracy and load-bearing capacity, and are widely used in applications requiring high precision. This study analyzes the impact of capillary tube geometry on the pressure in hydrostatic bearings using numerical simulation methods. Results indicate that the pressure ratio between the oil chamber and the pump decreases as the lc/dc ratio increases, and β increases with the capillary tube diameter dc. Within the capillary diameter range of 0.3mm to 0.6mm, an appropriate lc/dc ratio can be selected to meet the requirement of 0.4 <
β <
0.7. The oil film formation mechanism through capillary tubes shows that the geometric parameters of the capillary tube directly affect the pressure ratio between the oil chamber and the pump, ensuring operational conditions, particularly the bearing clearance limits. The pairs of capillary diameter and capillary ratio (dc
lc/dc) corresponding to (0.3
33), (0.4
78), (0.5
152), (0.6
200) are identified as suitable to maintain the bearing clearance within permissible limits. This research contributes to a deeper understanding of the influence of capillary tube geometry on the performance of hydrostatic bearings. The findings can be used to design and optimize more efficient hydrostatic bearing systems, especially in high-precision applications such as external cylindrical grinding machines.

1. Đọc trực tuyến

1. Đọc trực tuyến

Tạo bộ sưu tập với mã QR