CN-121655884-B - Automatic testing system and method for oil yield of high-speed bearing based on volumetric method

CN121655884BCN 121655884 BCN121655884 BCN 121655884BCN-121655884-B

Abstract

The invention relates to the technical field of high-speed bearing testing, in particular to an automatic testing system and method for the oil yield of a high-speed bearing based on a volumetric method, comprising a rotating shaft system unit and an oil receiving unit; the rotary shafting unit comprises an oil baffle plate, a stop piece, a rotating shaft, an oil collecting nut, a slip ring, a nozzle, a bearing seat, a shell and an oil accumulation spacer; the oil accumulation spacer bush, the slip ring, the stop piece and the oil collection nut are arranged on the rotating shaft, the inner ring of the bearing is fixed on the slip ring, and the outer ring of the bearing is fixed on the bearing seat through screws; the high-speed bearing oil yield automatic test system and the method have high measurement accuracy and high automation degree, adopt a high-accuracy liquid level sensor and a measurement oil tank with known sectional area, automatically and continuously meter by a volumetric method, and eliminate manual measurement errors.

Inventors

LIU JING
Hao Bangguo
YU HAIBO
LI YUCHUAN
LIU MINGHUI
LIU DANDAN
FU LIYANG
GAO JIAQI
HE LIN
YANG XIJUN

Assignees

洛阳轴承集团股份有限公司

Dates

Publication Date: 20260512
Application Date: 20260209

Claims (6)

1. The automatic high-speed bearing oil yield testing system based on the volumetric method is characterized by comprising a rotating shaft system unit and an oil yield unit; The rotating shaft system unit comprises an oil baffle plate (1), a stop piece (2), a rotating shaft (3), an oil collecting nut (4), a slip ring (5), a nozzle (6), a bearing (7), a bearing seat (8), a shell (9) and an oil accumulation spacer sleeve (10), wherein the oil accumulation spacer sleeve (10), the slip ring (5), the stop piece (2) and the oil collecting nut (4) are arranged on the rotating shaft (3), an inner ring of the bearing (7) is fixed on the slip ring (5), an outer ring of the bearing is fixed on the bearing seat (8) through screws, an oil collecting cover (11) and the oil baffle plate (1) are respectively arranged on left and right end surfaces of the bearing seat (8), after lubricating oil enters the nozzle (6), lubricating oil is sprayed into the oil collecting nut (4) at a certain angle, and enters the inside of the bearing (7) through the stop piece (2) and the slip ring (5), the lubricating oil entering the inside the bearing (7) overflows from the left side and the lubricating oil entering the left side of the bearing seat (7), and the lubricating oil entering the oil collecting cover (11) from the left side directly enters the left side of the bearing seat (7) through screws, and the oil collecting cover (11) from the left side of the bearing seat (8) is isolated from the lubricating oil collecting cover (1) and the lubricating oil entering the left side of the bearing (8); The oil collecting unit comprises an oil collecting pipe (12), an oil pump (13), an oil collecting container (14) and a liquid level sensor (15), wherein the oil collecting pipe (12) is connected with an oil collecting cover (11) in the rotary shaft system unit, the oil pump (13) is positioned in the middle of the oil collecting pipe (12) and connected with the oil collecting pipe (12), and the liquid level sensor (15) is placed in the oil collecting container (14) and is used for precisely measuring the change of the liquid level height in the oil collecting container (14) and transmitting a real-time liquid level signal to an automatic measurement and control system.
2. The automatic testing system for the oil recovery rate of the high-speed bearing based on the volumetric method according to claim 1, wherein the oil pump (13) is positioned in the middle of the oil recovery pipe (12) and is connected with the oil recovery pipe (12) to pump the extracted lubricating oil into an oil recovery container (14) with a known cross-sectional area.
3. The automatic high-speed bearing oil yield testing system based on the volumetric method according to claim 2, wherein the oil receiving container (14) is cylindrical, and one end of the oil receiving pipe (12) entering the oil receiving container (14) is made into a chamfer.
4. A high-speed bearing oil yield automatic test system based on a volumetric method according to claim 3, wherein the inner ring of the bearing (7) is in interference fit with the rotating shaft (3), and the higher the rotating speed of the bearing (7), the more lubricating oil enters the bearing (7) through the slip ring (5).
5. A method of a volumetric-based automatic high speed bearing oil recovery test system according to any one of claims 1-4, comprising the steps of: s1, system initialization and parameter setting, namely injecting initial reference oil quantity into an oil receiving container (14), recording initial liquid level H0, and setting a test load spectrum on an automatic test system, wherein the test load spectrum comprises oil supply temperature T0, oil supply flow Q0, initial rotating speed n_start, end rotating speed n_end, rotating speed step delta n and stable operation time t_hold of each rotating speed point; S2, starting a programming test, namely controlling an oil supply system to run according to T0 and Q0 by the system, and accelerating a shafting with a bearing (7) to n_start; S3, stably measuring, namely after the rotating speed reaches n_start, maintaining the working condition to run for t_hold time by the system, collecting liquid level data by the measurement and control system during the period, calculating the volume change delta V_ according to the area of the existing container, and continuously calculating the instantaneous and average oil yield eta at the rotating speed point by combining with the oil supply flow Q_; s4, automatic working condition switching and continuous testing, wherein when the t_hold time is up, the rotating speed of the main shaft is increased by a step length delta n, and the step S3 is repeated; and S5, after the test is finished and the result shows that the test system automatically generates a complete characteristic curve of the oil yield eta along with the change of the rotating speed n, and stores and outputs data.
6. The method of claim 5, wherein the collected oil amount Q '= (s×Δh)/t, S is a cross-sectional area, Δh is a change of a liquid level height, t is an operation time, and the oil yield η = (Q'/Q) is 100%, and Q is an oil supply amount, i.e., a collected oil amount/an oil supply amount is 100%.

Description

Automatic testing system and method for oil yield of high-speed bearing based on volumetric method Technical Field The invention relates to the technical field of high-speed bearing testing, in particular to an automatic high-speed bearing oil yield testing system and method based on a volumetric method. Background The oil yield of the high-speed bearing is a key index for evaluating the design rationality of a lubricating system of the high-speed bearing. The lubricating oil needs to be not only effectively fed into the interior of the bearing, but also effectively "caught" and formed into a lubricating film by the rotating parts of the bearing (e.g., cage, rollers). The oil yield is the percentage of the oil quantity which actually enters the bearing to participate in lubrication and the total oil supply quantity under a specific working condition. The oil yield of the high-speed bearing is a key index for evaluating the design rationality of a lubricating system of the high-speed bearing. The existing measurement method mainly has the following types and inherent defects: the traditional manual measuring cup method is characterized in that lubricating oil enters the bearing through an oil supply system, an oil collecting cover is arranged at the end of the bearing, the lubricating oil is led into a container through a special oil pump, the volume of the lubricating oil in the inner container in unit time is measured by the manual measuring cup, and the oil collecting rate is calculated; The scheme relies on a mechanical isolation structure (oil collecting ring), has higher requirements on the processing and assembly of parts, and meanwhile, the use of a double-loop oil way and a plurality of flowmeters increases the complexity and fault points of the system, if the phenomenon of empty suction of an oil pump occurs, a turbine or a gear of the flowmeter still rotates and displays flow, thereby influencing the authenticity of a measurement result; Based on the above, a new technology for testing the oil yield, which not only ensures high precision and automation, but also has the advantages of simple system structure, high reliability and relatively low cost, is needed. Disclosure of Invention The invention aims to provide a high-speed bearing oil yield automatic test system and a high-speed bearing oil yield automatic test method based on a volumetric method, the high-speed bearing oil yield automatic test system and the high-speed bearing oil yield automatic test method have high measurement precision, the automatic degree is high, a high-precision liquid level sensor and a measuring oil tank with a known sectional area are adopted, automatic continuous metering is realized through a volumetric method, and manual measuring errors are eliminated. In order to achieve the above purpose, the present invention adopts the following technical scheme: A high-speed bearing oil recovery rate automatic test system based on a volumetric method comprises a rotary shaft system unit and an oil recovery unit; The rotary shafting unit comprises an oil baffle plate, a stop piece, a rotating shaft, an oil receiving nut, a slip ring, a nozzle, a bearing seat, a shell and an oil accumulating spacer bush, wherein the oil accumulating spacer bush, the slip ring, the stop piece and the oil receiving nut are arranged on the rotating shaft, an inner ring of the bearing is fixed on the slip ring, and an outer ring of the bearing is fixed on the bearing seat through screws; The oil collecting unit comprises an oil collecting pipe, an oil pump, an oil collecting container and a liquid level sensor, wherein the oil collecting pipe is connected with the oil collecting cover in the rotary shaft system unit, the oil pump is positioned in the middle of the oil collecting pipe and connected with the oil collecting pipe, and the liquid level sensor is placed in the oil collecting container and used for precisely measuring the change of the liquid level height in the oil collecting container and transmitting a real-time liquid level signal to an automatic measurement and control system. Furthermore, after entering the nozzle, the lubricating oil is sprayed into the oil receiving nut at a certain angle and enters the bearing through the stop piece and the slip ring, the lubricating oil entering the bearing overflows from the left side and the right side of the bearing, the lubricating oil coming out from the left side directly enters the oil receiving cover at the left side, the lubricating oil coming out from the right side is isolated by the oil baffle plate, and enters the oil receiving cover at the left side of the bearing through the oil path on the bearing seat. Further, the oil pump is positioned in the middle of the oil collecting pipe and connected with the oil collecting pipe, and can pump the pumped lubricating oil into an oil collecting container with a known cross-sectional area. Further, the oil receiving container is cylindrica