Grease injection detection device for all-metal joint bearing

Abstract

The utility model provides a grease injection detection device for an all-metal joint bearing, which relates to the field of bearing detection and comprises a support component, a grease injection component and a test component, and a bearing test piece is fixedly supported by the support component; the test assembly comprises a bearing test piece, a first accompanying test bearing, a second accompanying test bearing, a first loading plate, a second loading plate, a first core shaft and a second core shaft; the supporting assembly comprises a first supporting base, a second supporting base, a first ejector block, a second ejector block, an adapter flange and a locking nut. The grease injection assembly comprises a grease injection pump and a grease injection pipe. The all-metal joint bearing lubrication period detection device is simple in overall structure, can realize all-metal joint bearing lubrication period detection, provides two grease injection modes to meet the grease injection requirements of different bearings, and can ensure the accuracy of detection results.

Description

Technical Field

[0001] The utility model relates to the field of bearing detection, in particular to a grease injection detection device for an all-metal spherical bearing. Background Art

[0002] All-metal spherical bearings are a type of spherical sliding bearings. This type of bearing is mainly used in the fuselage, rotor, control system and other parts of aircraft and helicopters, and plays an important role in rotational support. All-metal spherical bearings are compact in size, high in load-bearing capacity, and have self-aligning ability. Their movement mode is mostly low-speed swing or rotation. The operating temperature range is generally between -55℃ and 120℃. They are lubricated with grease and require regular lubrication and maintenance. The structure of this type of product mainly includes an inner ring and an outer ring. The inner ring or outer ring is provided with various forms of lubrication grooves and lubrication holes, including spiral lubrication grooves, cross lubrication grooves, axial lubrication grooves, etc., which can meet the needs of different working conditions. However, the setting of the lubrication cycle of all-metal spherical bearings is still in the exploratory stage. There is a lack of reasonable and effective all-metal spherical bearing lubrication cycle detection devices, and there is a practical problem that it is difficult to ensure the accuracy of detection due to strong subjectivity.

[0003] In summary, it is necessary and urgent to study a full-metal spherical plain bearing lubrication cycle detection device to meet the different bearing grease injection test requirements while realizing the automatic detection of the lubrication cycle of the full-metal spherical plain bearing. Utility Model Content

[0004] Based on the defects of the above-mentioned prior art, the purpose of the utility model is to provide a full-metal spherical bearing grease injection detection device, which has a simple overall structure and can realize the full-metal spherical bearing lubrication cycle detection, realize the full-metal spherical bearing lubrication cycle automatic detection while meeting the test requirements, and can ensure the accuracy of the test results. At the same time, the loading plate includes a first loading plate and a second loading plate of two structures, and the mandrel includes a first mandrel and a second mandrel of two structures. When necessary, it can be selected according to the lubrication requirements of different bearings, which is easy to use and meets the application of multiple scenarios.

[0005] Specifically, the utility model provides a full-metal spherical bearing grease injection detection device, which includes a testing machine, a support assembly, a grease injection assembly and a test assembly, wherein the test assembly is fixedly supported by the support assembly;

[0006] The test assembly comprises a bearing test piece, a first companion test bearing, a second companion test bearing, a loading plate and a mandrel, the side plate of the loading plate is provided with the bearing test piece, the top plate of the loading plate is connected to the loading cylinder of the testing machine so as to provide load for the bearing test piece, the first companion test bearing and the second companion test bearing, the mandrel is a stepped shaft, the first end of the mandrel is provided with a drum-shaped structure, the middle section of the mandrel cooperates with the inner rings of the bearing test piece, the first companion test bearing and the second companion test bearing and provides torque for the bearing test piece, the first companion test bearing and the second companion test bearing;

[0007] The support assembly comprises a first support seat, a second support seat, a first top block, a second top block, an adapter flange and a locking nut, the side plates of the first support seat and the second support seat are respectively installed with a first test bearing and a second test bearing, and the bottom plates of the first support seat and the second support seat are respectively fixed on the testing machine; the first top block and the second top block are respectively arranged on the inner sides of the first support seat and the second support seat; a drum-shaped through hole matching the drum-shaped structure of the first end of the core shaft is provided on the cross section of the adapter flange, and threaded holes connected to the swing cylinder of the testing machine are evenly arranged on the outer circumference of the outer side of the drum-shaped through hole, and the locking nut is threadedly connected to the second end of the core shaft;

[0008] The grease injection assembly includes a grease injection pump and a grease injection tube, wherein the first end of the grease injection tube is connected to the grease injection pump, and the second end of the grease injection tube is connected to the loading plate side plate or the second end of the core shaft to inject grease into the bearing outer ring or the bearing inner ring.

[0009] Preferably, the loading plate is the first loading plate or the second loading plate, the mandrel is the first mandrel or the second mandrel, the first loading plate cooperates with the second mandrel, the second loading plate cooperates with the first mandrel, and the second end of the grease injection tube is threadedly connected to the side plate of the second loading plate or the second end of the second mandrel.

[0010] Preferably, the side plates of the first loading plate are provided with threaded holes for installing bearing specimens, the side plates of the second loading plate are provided with threaded holes for installing bearing specimens and threaded grease injection holes for connecting the grease injection tube and penetrating the threaded holes, the second end of the first core shaft is provided with an external thread connected to the locking nut, the second end of the second core shaft is also provided with an external thread connected to the locking nut and an internal thread connected to the grease injection tube, the second core shaft is also provided with a blind hole on the cross section on one side of the internal thread, and three evenly distributed through holes that are penetrating the blind hole are provided on the outer cylindrical surface where the bottom of the blind hole is located.

[0011] Preferably, the three through holes are evenly arranged at intervals of 120 degrees on the outer cylindrical surface.

[0012] Preferably, the side plates of the first support seat and the second support seat are both provided with bearing holes for mounting the first test bearing and the second test bearing, and the bottom plates of the first support seat and the second support seat are both provided with threaded holes connected to the testing machine.

[0013] Preferably, the cross sections of the first top block and the second top block are both provided with through holes cooperating with the core shaft.

[0014] Preferably, the first support seat and the second support seat are symmetrically arranged.

[0015] Preferably, the grease injection pump is connected to a controller.

[0016] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0017] (1) The utility model provides a full-metal spherical bearing grease injection detection device, which has a simple overall structure and can realize full-metal spherical bearing lubrication cycle detection. It can realize full-metal spherical bearing lubrication cycle automatic detection while meeting the test requirements and can ensure the accuracy of the detection results.

[0018] (2) The utility model is provided with a first loading plate, a second loading plate, a first mandrel and a second mandrel. Both the second loading plate and the second mandrel can be connected to a grease injection tube. When in use, they can be selected according to the lubrication requirements of different bearings. The first loading plate cooperates with the second mandrel, and the second loading plate cooperates with the first mandrel. When the second loading plate is selected to connect to the grease injection tube, the outer ring of the bearing can be greased. When the second mandrel is selected to connect to the grease injection tube, the inner ring of the bearing can be greased. The operation is convenient and can meet the application of multiple scenarios. The threaded grease injection hole of the second loading plate is located outside the grease injection groove of the outer ring of the bearing, and three evenly distributed through holes are evenly distributed outside the grease injection groove of the inner ring of the bearing, so that uniform grease injection can be achieved when the bearing has torque.

[0019] (3) The loading plate of the utility model is used to connect to the testing machine to apply load, and the core shaft is connected to the testing machine by means of an adapter flange to apply torque, so that the tested bearing has actual load and torque, thereby ensuring the accuracy and precision of the test results. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is one of the overall three-dimensional structural schematic diagrams of the utility model;

[0021] Figure 2 This is the second schematic diagram of the overall three-dimensional structure of the utility model;

[0022] Figure 3 This is a schematic structural diagram of the first support seat of the utility model;

[0023] Figure 4 It is a structural schematic diagram of the first top block of the utility model;

[0024] Figure 5 It is a structural schematic diagram of the adapter flange of the utility model;

[0025] Figure 6 It is a structural schematic diagram of the first loading plate of the utility model;

[0026] Figure 7 It is a structural schematic diagram of the second loading plate of the utility model;

[0027] Figure 8 It is a structural schematic diagram of the first mandrel of the utility model;

[0028] Fig. 9 It is a structural schematic diagram of the second mandrel of the utility model;

[0029] Fig.10 This is a schematic diagram of the result of the external grease injection bearing in the embodiment of the utility model;

[0030] Fig.11 It is a structural schematic diagram of an internal grease-filled bearing in an embodiment of the utility model. DETAILED DESCRIPTION

[0031] Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

[0032] The utility model provides a full metal spherical bearing grease injection detection device, such as Figure 1 to Figure 2 As shown, it includes a testing machine, a support assembly 3, a grease injection assembly 2 and a testing assembly. The testing assembly 3 is fixedly supported by the support assembly 3, and the grease injection assembly 2 is used to inject grease into the testing assembly. The testing machine is used to provide load and torque, etc., which are not shown in the figure. Figure 1 and Figure 2 Two grease injection situations are shown, respectively, which can be used to inject grease into the outer ring of the bearing or the inner ring of the bearing.

[0033] The test assembly includes a bearing specimen, a first test bearing, a second test bearing, a loading plate 4 and a mandrel 5. The side plate of the loading plate 4 is provided with the bearing specimen. The top plate of the loading plate 4 is threadedly connected to the loading cylinder of the test machine so as to provide load for the bearing specimen, the first test bearing and the second test bearing. The mandrel 5 is a stepped shaft, and a drum-shaped structure 512 is provided at the first end of the stepped shaft. The middle section of the mandrel 5 cooperates with the inner rings of the bearing specimen, the first test bearing and the second test bearing. The mandrel 5 is connected to the swing cylinder of the test machine by means of the adapter flange 35 of the support assembly 3, so as to provide torque for the bearing specimen, the first test bearing and the second test bearing.

[0034] The support assembly 3 includes a first support seat 31, a second support seat 32, a first top block 33, a second top block, an adapter flange 35 and a locking nut. The side plates of the first support seat 31 and the second support seat 32 are respectively installed with the first test bearing and the second test bearing. The bottom plates of the first support seat 31 and the second support seat 32 are respectively connected to the test machine; the first top block 33 and the second top block 34 are respectively arranged on the inner side of the first support seat and the second support seat. Figure 5 As shown, the cross section of the adapter flange 35 is provided with a drum-shaped through hole 351 matching the drum-shaped structure of the stepped shaft, and the outer circumference of the outer side of the drum-shaped through hole is evenly distributed with threaded holes 352 connected to the swing cylinder of the test machine. The adapter flange 35 and the mandrel 5 are used to transmit the torque of the swing cylinder of the test machine, so that the bearing test piece, the first companion test bearing and the second companion test bearing can rotate or swing. The locking nut is connected to the external thread of the second end of the mandrel.

[0035] The grease injection assembly 2 includes a grease injection pump 22 and a grease injection tube 21. The first end of the grease injection tube 21 is connected to the grease injection pump 22, and the second end of the grease injection tube 21 is connected to the grease injection hole on the side plate of the loading plate or the blind hole on the core shaft, so that different bearings can be greased. When the outer ring of the bearing needs to be greased, the second end of the grease injection tube 21 can be connected to the side plate of the loading plate to achieve grease injection on the outer ring of the bearing. When the inner ring of the bearing needs to be greased, the second end of the grease injection tube 21 can be connected to the core shaft to achieve grease injection on the inner ring of the bearing. Figure 1 The figure shows the connection between the grease injection pipe 21 and the side plate of the loading plate.

[0036] In a specific embodiment, Figures 6 to 9 As shown, the loading plate 4 is the first loading plate 41 or the second loading plate 42, and the mandrel 5 is the first mandrel 51 or the second mandrel 52. When used, one of them is selected for combination according to the type of the bearing. The first loading plate 41 is used in conjunction with the second mandrel 52, and the second loading plate 42 is used in conjunction with the first mandrel 51. Fig.10 As shown, when the outer ring of the bearing specimen is provided with a grease injection groove 100, the second loading plate 42 and the first mandrel 51 are selected to perform external grease injection, as shown in FIG. Figure 1 As shown, the grease injection pipe is connected to the threaded grease injection hole on the side plate of the second loading plate 42. Since the threaded grease injection hole on the side plate of the second loading plate 42 is just located outside the grease injection groove of the outer ring of the bearing, the grease directly enters the grease injection groove 100 on the outer ring and enters the grease injection groove of the outer ring of the bearing evenly through the grease injection hole to achieve lubrication. When the inner ring of the bearing specimen is provided with a grease injection groove 101, as shown in FIG. Fig.11 As shown, that is, the bearing is an internal grease bearing, the first loading plate 41 and the second mandrel 52 are selected to be matched for internal grease injection, such as Figure 2As shown, the grease injection tube is connected to the blind hole on the end face of the second mandrel 52, and the grease is directly injected into the grease injection groove 101 on the inner ring of the bearing through three evenly distributed through holes on the outer cylindrical surface where the bottom of the blind hole is located, so as to achieve lubrication of the inner ring of the bearing. The position of the threaded grease injection hole and the three evenly distributed through holes can achieve uniform grease injection when the bearing has torque.

[0037] In the specific embodiment, the side plates of the first loading plate 41 and the second loading plate 42 are both provided with threaded holes 411 for mounting the bearing test piece, the side plates of the second loading plate 42 are provided with threaded grease injection holes 421 that penetrate the threaded holes 411, the first ends 511 of the stepped shafts of the first mandrel 51 and the second mandrel 52 are both provided with two drum-shaped structures 512 connected with the adapter flange, the second end 513 of the stepped shaft of the first mandrel 51 is provided with an external thread 514 connected with a locking nut, the second end 513 of the stepped shaft of the second mandrel 52 is provided with an external thread connected with a locking nut and an internal thread 518 that is threadedly connected with a grease injection pipe, and the middle section 515 of the mandrel is matched with the bearing test piece and the inner rings of the first and second companion test bearings. The second mandrel 52 is also provided with a blind hole 516 on the cross section on one side of the external thread, and three through holes 517 that are evenly distributed and penetrate the blind hole are provided on the outer cylindrical surface where the bottom of the blind hole 516 is located. The blind hole is connected to the grease injection pipe and further grease is injected through the through hole. The threaded grease injection hole 421 of the second loading plate is located outside the grease injection hole of the outer ring of the bearing, and the three evenly distributed through holes 517 are evenly distributed outside the grease injection hole of the inner ring of the bearing, so that even grease injection can be achieved on the basis of the torque of the bearing.

[0038] In a specific embodiment, the first support seat 31 and the second support seat 32 have the same structure and are symmetrically arranged to support the test assembly. Figure 3 The first support seat 31 is used as an example for description. Figure 3 As shown, the side plates of the first support seat 31 and the second support seat 32 are provided with bearing holes 311 for installing the first test bearing and the second test bearing, and the bottom plates of the first support seat 31 and the second support seat 32 are provided with threaded holes 312 connected to the testing machine.

[0039] In a specific embodiment, the first top block 33 and the second top block have the same structure and are respectively arranged on the inner side of the first support seat 31 and the second support seat 32, and are used to separate the axial positions of the first support seat 31, the second support seat 32 and the loading plate to prevent interference. Figure 4 As shown, the first top block 33 and the second top block are both provided with a through hole 331 that matches the core shaft.

[0040] In a specific embodiment, the grease injection pump is connected to a controller, and the controller controls the operation of the grease injection pump to perform a grease injection test on the bearing.

[0041] The grease injection process of the grease injection device of the utility model is described in detail below:

[0042] The grease injection interval detection test uses the torque of the core shaft rotating or swinging during the test as the detection index. The controller divides the grease injection conditions into stage one and stage two. Stage one is the fixed grease injection period, and stage two is the automatic grease injection period. The controller can set the grease injection frequency and single grease injection time of the fixed grease injection period, and detect the torque value in the whole process to realize the detection of the number of grease injections and duration.

[0043] During stage one, the duration of the entire stage one, the grease injection frequency and the single grease injection time are set, and the bearing specimen is lubricated according to the set grease injection frequency and single grease injection time. After the swing (or rotation) of the bearing specimen tends to be stable, the torque peak value of the stable swing (or rotation) stage is recorded. In stage two, the torque peak value recorded in stage one is used as the basis for the subsequent automatic grease injection judgment. In stage two, when the real-time torque value exceeds the torque peak value recorded in stage one, the software system controls the grease injection pump to automatically inject grease. If the real-time torque is always greater than the torque peak value, the grease injection continues until the real-time torque is lower than the torque peak value. Determine whether to turn on and off the automatic control and the grease injection time to ensure the lubrication requirements during the bearing test. The specific test method is as follows:

[0044] Phase 1: The first 2500 tests (the number of tests can be set)

[0045] Test conditions: Grease injection is set every 100 times, and the single grease injection time is 8s. In the early stage of the test, the grease is fully lubricated in the bearing through a certain number of swing running-in to ensure the stability of the test torque peak. The test torque peak data of the first 1200 times are not included in the screening. The maximum value of the test torque peak during the 1200-2500 test process is screened and recorded as the index value of stage 2. Table 1 and Table 2 show the grease injection conditions of stage 1 and stage 2 respectively.

[0046] Table 1 Stage 1 Grease injection conditions

[0047] Grease injection conditions Grease injection parameters Grease injection interval 100 times Single grease injection time 8s Valid data screening range The maximum value of the test torque peak value during 1200-2500 tests

[0048] Phase 2: After 2500 times until the end of the experiment

[0049] Test conditions: The peak torque value recorded in stage one is used as the basis for automatic grease injection judgment in this stage. When the test torque in stage two is greater than the peak torque value recorded in stage one, grease injection begins. The single grease injection time is 5s. If the real-time torque is always greater than the peak torque value, grease injection continues until the real-time torque is lower than the recorded peak torque value.

[0050] Table 2 Stage 2 Grease Injection Conditions

[0051] Grease injection conditions Grease injection parameters Grease injection interval / Single grease injection time 5s Conditions for starting grease injection The real-time torque is greater than the peak torque recorded in stage 1

[0052] The grease injection detection device of the utility model has a simple overall structure and can realize the lubrication cycle detection of all-metal spherical bearings. It can realize automatic detection of the lubrication cycle of all-metal spherical bearings while meeting the test requirements, meet the grease injection of different types of bearings and ensure the accuracy of the detection results.

[0053] The above embodiments are only descriptions of the preferred implementation modes of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should fall within the protection scope determined by the claims of the present invention.

Claims

1. A full metal spherical bearing grease injection detection device, characterized in that: It includes a testing machine, a supporting assembly, a grease injection assembly and a testing assembly, wherein the testing assembly is fixedly supported by the supporting assembly; The test assembly comprises a bearing test piece, a first companion test bearing, a second companion test bearing, a loading plate and a mandrel, the side plate of the loading plate is provided with the bearing test piece, the top plate of the loading plate is connected to the loading cylinder of the testing machine so as to provide load for the bearing test piece, the first companion test bearing and the second companion test bearing, the mandrel is a stepped shaft, the first end of the mandrel is provided with a drum-shaped structure, the middle section of the mandrel cooperates with the inner rings of the bearing test piece, the first companion test bearing and the second companion test bearing and provides torque for the bearing test piece, the first companion test bearing and the second companion test bearing; The support assembly comprises a first support seat, a second support seat, a first top block, a second top block, an adapter flange and a locking nut, the side plates of the first support seat and the second support seat are respectively installed with a first test bearing and a second test bearing, and the bottom plates of the first support seat and the second support seat are respectively fixed on the testing machine; the first top block and the second top block are respectively arranged on the inner sides of the first support seat and the second support seat; a drum-shaped through hole matching the drum-shaped structure of the first end of the core shaft is provided on the cross section of the adapter flange, and threaded holes connected to the swing cylinder of the testing machine are evenly arranged on the outer circumference of the outer side of the drum-shaped through hole, and the locking nut is threadedly connected to the second end of the core shaft; The grease injection assembly includes a grease injection pump and a grease injection tube, the first end of the grease injection tube is connected to the grease injection pump, and the second end of the grease injection tube is connected to the loading plate side plate or the second end of the core shaft to grease the bearing outer ring or the bearing inner ring.

2. The all-metal spherical bearing grease injection detection device according to claim 1 is characterized in that: The loading plate is the first loading plate or the second loading plate, the mandrel is the first mandrel or the second mandrel, the first loading plate cooperates with the second mandrel, the second loading plate cooperates with the first mandrel, and the second end of the grease injection tube is threadedly connected to the side plate of the second loading plate or the second end of the second mandrel.

3. The all-metal spherical bearing grease injection detection device according to claim 2 is characterized in that: The side plates of the first loading plate are both provided with threaded holes for installing bearing specimens, the side plates of the second loading plate are provided with threaded holes for installing bearing specimens and threaded grease injection holes for connecting the grease injection tube and penetrating the threaded holes, the second end of the first core shaft is provided with an external thread connected to the locking nut, the second end of the second core shaft is also provided with an external thread connected to the locking nut and an internal thread connected to the grease injection tube, the second core shaft is also provided with a blind hole on the cross section on one side of the internal thread, and three evenly distributed through holes penetrating the blind hole are provided on the outer cylindrical surface where the bottom of the blind hole is located.

4. The all-metal spherical bearing grease injection detection device according to claim 3 is characterized in that: The three through holes are evenly arranged at intervals of 120 degrees on the outer cylindrical surface.

5. The all-metal spherical bearing grease injection detection device according to claim 1 is characterized in that: The side plates of the first support seat and the second support seat are both provided with bearing holes for installing the first test bearing and the second test bearing, and the bottom plates of the first support seat and the second support seat are both provided with threaded holes connected to the testing machine.

6. The all-metal spherical bearing grease injection detection device according to claim 1 is characterized in that: The first top block and the second top block are both provided with through holes matched with the core shaft in their cross sections.

7. The all-metal spherical bearing grease injection detection device according to claim 5, characterized in that: The first supporting seat and the second supporting seat are symmetrically arranged.

8. The all-metal spherical bearing grease injection detection device according to claim 1 is characterized in that: The grease injection pump is connected with a controller.

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