Oil recovery efficiency detection device for bearing test

Abstract

An oil collection efficiency detection device for a bearing test comprises a test main shaft, a test bearing, a supporting wheel, an oil guide rod, an oil collection cover and a sleeve, an inner ring of the test bearing is positioned by an inner end cover and the sleeve, an outer end cover is fixedly connected to one side face of the supporting wheel, and one end of the oil guide rod is connected to the outer end cover. The oil collecting cover is fixedly connected to the other side face of the supporting wheel, a first oil cavity is defined by one side of the test bearing, the inner end cover and the supporting wheel, a second oil cavity is defined by the other side of the test bearing, the oil collecting cover and the sleeve, and a first oil collecting opening is formed in the lower end of the oil collecting cover. Through the arrangement, the lubricating oil passing through the test bearing and the lubricating oil not passing through the test bearing are separated and are separately recovered through the two independent oil holes in the supporting wheel, and the device can accurately collect the flow of the lubricating oil actually entering a bearing raceway in the bearing operation process, so that the oil recovery efficiency of the test device is calculated.

Description

Technical Field

[0001] The utility model relates to the technical field of detection equipment for bearings, and particularly relates to an oil collection efficiency detection device for bearing tests. Background Art

[0002] As is well known, lubrication has an important influence on the fatigue life, friction, wear, temperature, vibration, etc. of rolling bearings. Good lubrication of bearings can form an oil film to prevent or reduce direct contact between metals among rolling elements, raceways and cages in the bearings, and reduce friction and wear. When a pressure oil film is formed on the friction surface, the contact bearing area of parts can be increased. Therefore, it can play the role of reducing contact stress and prolonging the rolling contact fatigue life.

[0003] The existing oil collection efficiency detection structure of test machines usually replaces it by measuring the oil supply flow rate, and it is impossible to accurately count the lubricating oil flow rate flowing through the raceway of the test bearing. As a result, the test results of different test devices are not the same. Summary of the Utility Model

[0004] In order to solve the above technical problems, the purpose of the utility model is to provide an oil collection efficiency detection device for bearing tests.

[0005] The technical scheme adopted by the utility model is: an oil collection efficiency detection device for bearing tests, which includes a test main shaft, a test bearing installed on the test main shaft, and a support wheel. The support wheel is rotationally installed on the test main shaft through the test bearing. There are also an oil guide rod, an oil collection cover and a sleeve. The inner ring of the test bearing is positioned by an inner end cover fixed at the end of the test main shaft and a sleeve sleeved on the outer peripheral surface of the test main shaft. The outer end cover is fixedly connected to one side surface of the support wheel. One end of the oil guide rod is connected to the outer end cover, and the other end passes through the hole in the inner end cover and extends into the inner hole of the test main shaft to transmit lubricating oil to the test bearing. The oil collection cover is fixedly connected to the other side surface of the support wheel. One side of the test bearing and the inner end cover and the support wheel enclose a first oil cavity. The other side of the test bearing and the oil collection cover and the sleeve enclose a second oil cavity. An oil passage communicating the first oil cavity and the second oil cavity is arranged inside the support wheel, and a first oil collection port is arranged at the lower end of the oil collection cover.

[0006] As a preferred scheme, a retaining ring is also provided. The retaining ring is fixedly installed on one side of the support wheel through a locking screw and presses the outer ring of the test bearing.

[0007] As a preferred scheme, an oil supply port is arranged on the outer end cover. An external oil supply device is connected to the oil supply port through an oil inlet pipeline. The lubricating oil passes through the oil supply port and sequentially passes through the oil passage of the outer end cover, the oil passage of the oil guide rod and the oil passage of the test main shaft and enters the test bearing.

[0008] As a preferred solution, a flow meter is further provided on the oil inlet pipeline connected to the oil supply port of the outer end cover.

[0009] As a preferred solution, annular grooves are provided on both the inner hole wall and the outer circumferential surface of the test main shaft, and the annular grooves are connected by an oil passage. Among them, the annular groove on the outer circumferential surface corresponds to the position of the test bearing, and the lubricating oil ejected from the oil guiding rod sequentially enters the test bearing through the inner annular groove, the oil passage and the outer annular groove of the inner hole of the test main shaft.

[0010] As a preferred solution, the outer end cover, the support wheel and the inner end cover enclose a third oil cavity, and the oil in the third oil cavity sequentially enters the oil return pipeline through the oil passage provided on the support wheel and the second oil collecting port.

[0011] As a preferred solution, one end of the oil collecting cover is fixedly connected to the side surface of the support wheel by a locking screw, and the other end is in clearance fit with the sleeve.

[0012] As a preferred solution, the outer edge surface of the inner end cover is in clearance fit with the inner circular surface of the support wheel.

[0013] As a preferred solution, the first oil collecting port of the oil collecting cover is connected to a measuring cup through an oil return pipe.

[0014] The beneficial effects of the present utility model are as follows:

[0015] Based on the defects existing in the prior art, this solution provides an oil collecting efficiency detection device for bearing tests. By optimizing the structural design, multiple oil cavities are formed by the outer end cover, the inner end cover, the support wheel and the oil collecting cover. Specifically: one side of the test bearing and the inner end cover and the support wheel enclose a first oil cavity, the other side of the test bearing and the oil collecting cover and the sleeve enclose a second oil cavity, and an oil passage communicating the first oil cavity and the second oil cavity is provided inside the support wheel. The outer end cover, the support wheel and the inner end cover enclose a third oil cavity. Through the above settings, the lubricating oil passing through the test bearing and the lubricating oil not passing through the test bearing are separated, and are separately recovered through two independent oil holes on the support wheel. This device can accurately collect the flow rate of the lubricating oil actually entering the bearing raceway during the operation of the bearing, so as to calculate the oil collecting efficiency of the test device; this detection device can also meet the oil collecting efficiency detection tests of different types of radial bearings, and has the advantages of wide application range, simple structure and convenient disassembly and assembly.

[0016] Furthermore, this solution optimizes the internal oil passage. Annular grooves are provided on both the inner hole wall and the outer circumferential surface of the test main shaft, and the annular grooves are connected by an oil passage. Among them, the annular groove on the outer circumferential surface corresponds to the position of the test bearing, and the lubricating oil ejected from the oil guiding rod sequentially enters the test bearing through the inner annular groove, the oil passage and the outer annular groove of the inner hole of the test main shaft.

[0017] Furthermore, in this solution, the inner and outer end covers, support wheels, oil collecting covers, and retaining rings are all connected by locking screws, which is stable and reliable and can meet the test conditions at any rotational speed within the range of 0 to 20,000 rpm. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0019] Figure 1 It is a cross-sectional view of one implementation manner of the present invention;

[0020] Figure 2 is Figure 1 a partial enlarged schematic view of part A in

[0021] Figure 3 a cross-sectional view of the support wheel.

[0022] Reference numerals: 1, support wheel; 1-1, left oil passage; 1-2, right oil passage; 1-3, second oil collecting port; 2, inner end cover; 3, outer end cover; 3-1, oil supply port; 4, oil guiding rod; 5, test main shaft; 6, retaining ring; 7, oil collecting cover; 7-1, first oil collecting port; 8, sleeve; 9, first oil cavity; 10, second oil cavity; 11, third oil cavity. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0023] Hereinafter, the present invention will be specifically described through exemplary embodiments. However, it should be understood that without further elaboration, the elements, structures, and features in one embodiment can also be beneficially combined with those in other embodiments.

[0024] It should be noted that: unless otherwise defined, the technical terms or scientific terms used herein should have the ordinary meaning understood by those of ordinary skill in the art belonging to the field of the present invention; the words such as "a", "one", or "the" used in the specification and claims of the present invention patent application do not express a limitation on quantity, but indicate the existence of at least one; the words such as "including" or "comprising" point out that the elements or objects appearing before "including" or "comprising" cover the elements or objects listed after "including" or "comprising" and their equivalents, but do not exclude other elements or objects with the same functions;

[0025] For a clearer description of the specific structural composition and the oil collection efficiency detection process of the oil collection efficiency detection device for bearing tests, in combination with the attachedFigures 1-3 Detailed description of this embodiment:

[0026] As shown in the figure, an oil collection efficiency detection device for bearing tests mainly consists of a support wheel 1, an inner end cover 2, an outer end cover 3, an oil guide rod 4, a test main shaft 5, a retaining ring 6, an oil collection cover 7, a sleeve 8, and a test bearing to be detected. Among them, the support wheel 1 is rotatably installed on the test main shaft 5 through a test bearing. Both sides of the inner ring of the test bearing are positioned by the inner end cover 2 fixed to the shaft end of the test main shaft 5 and the sleeve 8 sleeved on the outer peripheral surface of the test main shaft. The outer ring of the test bearing is positioned by the retaining ring 6 fixedly installed on the support wheel 1. The outer end cover 3 is fixedly connected to one side surface of the support wheel 1 and wraps the inner end cover 2 inside. A sealing ring is provided between the outer end cover 3 and the support wheel 1 and is pressed by screws to prevent lubricating oil leakage. One end of the oil guide rod 4 is threadedly connected to the outer end cover 3, and the other end passes through the hole in the inner end cover 2 and extends into the inner hole of the test main shaft 5 for transmitting lubricating oil to the test bearing. The oil collection cover 7 is fixedly connected to the other side surface of the support wheel 1. One side of the test bearing and the inner end cover 2 and the support wheel 1 enclose a first oil chamber 9, and the other side of the test bearing and the oil collection cover 7 and the sleeve 8 enclose a second oil chamber 10. A right oil passage 1-2 connecting the first oil chamber 9 and the second oil chamber 10 is provided inside the support wheel 1. A first oil collection port 7-1 is provided at the lower end of the oil collection cover 7. The first oil collection port 7-1 is connected to a measuring cup through a return oil pipe. After setting the rotation speed and oil supply flow rate and waiting for the test state to be stable, the amount of lubricating oil collected in the measuring cup is compared with the amount of lubricating oil supplied. After multiple tests, the average value is taken, which is the oil collection efficiency under this test condition.

[0027] In this embodiment, an oil supply port 3-1 is provided on the outer end cover 3. An external oil supply device is connected to the oil supply port 3-1 through an oil inlet pipeline. Lubricating oil passes through the oil supply port 3-1 and then flows into the test bearing through the oil passage of the outer end cover 3, the oil passage of the oil guide rod 4, and the oil passage of the test main shaft 5. A flow meter is also provided on the oil inlet pipeline connected to the oil supply port of the outer end cover. The flow meter is used to measure the oil supply flow rate.

[0028] In this embodiment, annular grooves are provided on both the inner hole wall and the outer circumferential surface of the test main shaft 5. The annular grooves are connected by oil passages. Among them, the annular groove on the outer circumferential surface corresponds to the position of the test bearing. When conducting the bearing oil collection efficiency detection test, lubricating oil enters the oil guide rod through the oil supply port of the outer end cover, and the lubricating oil sprayed from the oil guide rod sequentially enters the inner annular groove, oil passage, and outer annular groove of the inner hole of the test main shaft and then enters the inside of the test bearing.

[0029] In this embodiment, the retaining ring 6 is fixedly installed on the side surface of the support wheel 1 away from the outer end cover 3 through a locking screw and presses the outer ring of the test bearing.

[0030] In this embodiment, an outer end cover 3, a support wheel 1 and an inner end cover 2 enclose a third oil cavity 11. The oil in the third oil cavity 11 enters an oil return pipeline successively through a left oil passage 1-1 and a second oil collecting port 1-3 provided on the support wheel.

[0031] In this embodiment, one end of an oil collecting cover 7 is fixedly connected to the side surface of the support wheel 1 by a locking screw, and the other end is in clearance fit with a sleeve 8. A clearance of 0.5 mm can be provided between the oil collecting cover 7 and the sleeve 8. While preventing friction between the oil collecting cover and the sleeve due to rotation, the overflow amount of lubricating oil in the oil collecting cover is reduced. The size of this clearance value is related to the lubricating oil flow rate and the rotational speed of the test bearing.

[0032] In this embodiment, the outer edge surface of the inner end cover 2 is in clearance fit with the inner circular surface of the support wheel 1. Specifically, in this embodiment, the diameter of the outer edge surface of the inner end cover 2 differs from the diameter of the inner circular surface of the support wheel 1 by 0.5 mm. The size of this clearance value is mainly related to the lubricating oil supply flow rate and the rotational speed of the test bearing.

[0033] The assembly process of the oil collecting efficiency detection device for bearing tests is as follows:

[0034] First, install the sleeve 8, the retaining ring 6, the test bearing and the inner end cover 2. Fix the inner and outer rings of the test bearing by tightening the screws on the inner end cover 2 and the retaining ring 6. The test spindle 5 and the support wheel 1 are rotationally connected through the test bearing. The outer end cover 3 and the oil guiding rod 4 are connected by threads and are installed on the left end face of the support wheel 1 through the locking screws on the outer end cover 3. The oil collecting cover 7 is installed on the right end face of the support wheel 1.

[0035] During the oil collecting test, start the test spindle 5 to rotate at a set speed, start the oil supply device. A flowmeter is provided in the oil supply pipeline to measure the oil supply flow rate. The lubricating oil enters the oil passages in the outer end cover 3 and the oil guiding rod 4 through the oil supply port on the outer end cover 3. The lubricating oil sprays out circumferentially through the oil holes on the oil guiding rod 4. The sprayed lubricating oil gathers in the oil groove of the test spindle 5, and the lubricating oil is thrown into the test bearing through the annular groove on the rotating test spindle 5.

[0036] The lubricating oil entering the test bearing sprays out from both the left and right sides of the test bearing. The lubricating oil spraying out from the right side of the test bearing enters a second oil cavity 10 composed of the test bearing, the oil collecting cover 7 and the sleeve 8. The lubricating oil spraying out from the left side enters a first oil cavity 9 composed of the support wheel 1, the inner end cover 2 and the test bearing, and enters the second oil cavity 10 through the right oil passage 1-3 inside the support wheel 1. The lower end of the oil collecting cover 7 is provided with a first oil collecting port 7-1. Use a measuring cup to measure the lubricating oil flow rate through the first oil collecting port 7-1 and record it.

[0037] After the lubricating oil ejected through the oil holes on the oil guide rod 4 enters the inner hole of the test spindle 5, a part of the lubricating oil overflows along the gap between the oil guide rod 4 and the inner end cover 2 and enters the third oil cavity 11 composed of the support wheel 1, the inner end cover 2 and the end cover 3, and then enters the oil return pipeline through the left oil passage 1-1 and the oil collecting port 1-3 on the support wheel 1.

[0038] When calculating the oil collection efficiency, divide the volume of the lubricating oil entering the measuring cup per minute by the volume of the lubricating oil passing through the flowmeter in the oil supply pipeline, and obtain the average value after multiple tests, then the oil collection efficiency at the set rotational speed can be obtained. Set different rotational speeds of the test spindle 5 for several tests, and the oil collection trend of the high-speed bearing can be obtained.

[0039] The parts not detailed in the above embodiments are prior art.

[0040] It should be noted that although the present invention has been described through the above embodiments, the present invention can also have many other embodiments. Without departing from the spirit and scope of the present invention, those skilled in the art can obviously make various corresponding changes and deformations to the present invention, but these changes and deformations should all fall within the scope protected by the appended claims of the present invention and their equivalents.

Claims

1. An oil collection efficiency detection device for bearing testing, comprising a test spindle, a test bearing mounted on the test spindle, and a support wheel, wherein the support wheel is rotatably mounted on the test spindle through the test bearing, and is characterized in that: An oil guide rod, an oil collecting hood and a sleeve are also provided. The inner ring of the test bearing is positioned by an inner end cover fixed to the end of the test spindle and a sleeve mounted on the outer circumferential surface of the test spindle. The outer end cover is fixedly connected to one side of the support wheel. One end of the oil guide rod is connected to the outer end cover, and the other end passes through the hole on the inner end cover and extends into the inner hole of the test spindle to transmit lubricating oil to the test bearing. The oil collecting hood is fixedly connected to the other side of the support wheel. One side of the test bearing, the inner end cover and the support wheel form a first oil chamber, and the other side of the test bearing, the oil collecting hood and the sleeve form a second oil chamber. An oil passage connecting the first oil chamber and the second oil chamber is provided inside the support wheel, and a first oil collecting port is provided at the lower end of the oil collecting hood.

2. The oil collection efficiency detection device for bearing testing according to claim 1, characterized in that: A retaining ring is also provided, which is fixedly mounted on one side of the supporting wheel through a locking screw and presses the outer ring of the test bearing.

3. The oil collection efficiency detection device for bearing testing according to claim 1, characterized in that: The outer end cover is provided with an oil supply port, and an external oil supply device is connected to the oil supply port through an oil inlet pipeline. The lubricating oil enters the test bearing through the oil supply port and sequentially through the oil channel of the outer end cover, the oil channel of the oil guide rod and the oil channel of the test spindle.

4. The oil collection efficiency detection device for bearing testing according to claim 3 is characterized in that: A flow meter is also provided on the oil inlet pipeline connected to the oil supply port of the outer end cover.

5. The oil collection efficiency detection device for bearing testing according to claim 3 is characterized in that: The test spindle is provided with annular grooves on the inner hole wall and the outer circumferential surface, and the annular grooves are connected by oil channels, wherein the annular grooves on the outer circumferential surface correspond to the positions of the test bearings, and the lubricating oil sprayed from the oil guide rod passes through the inner annular groove, the oil channel and the outer annular groove of the inner hole of the test spindle in sequence and enters the interior of the test bearing.

6. The oil collection efficiency detection device for bearing testing according to claim 1, characterized in that: The outer end cover, the support wheel and the inner end cover form a third oil chamber, and the oil in the third oil chamber enters the oil return pipeline through the oil channel and the second oil receiving port arranged on the support wheel in sequence.

7. The oil collection efficiency detection device for bearing testing according to claim 1, characterized in that: One end of the oil collecting cover is fixedly connected to the side surface of the supporting wheel through a locking screw, and the other end is clearance-matched with the sleeve.

8. The oil collection efficiency detection device for bearing testing according to claim 1, characterized in that: The outer edge surface of the inner end cover and the inner circular surface of the supporting wheel are in clearance fit.

9. The oil collection efficiency detection device for bearing testing according to claim 1, characterized in that: The first oil collecting port of the oil collecting cover is connected to the measuring cup through an oil return pipe.

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