CN212008263U - A device for measuring the interfacial frictional resistance of a horizontally rotating spherical hinge - Google Patents

Abstract

The utility model discloses a device for measuring the interface friction resistance of a spherical hinge of a horizontal rotating body, which comprises a spherical hinge structure, a load system and a traction system; wherein the spherical hinge structure comprises an upper spherical hinge structure, a lower spherical hinge structure and a positioning pin And the ball joint positioning bracket; the load system includes a loading plate, several support feet, a spirit level, a self-weight block and a self-weight block placement rack; the traction system is integrally installed on the outside of the ball joint structure, including angle adjustment fixed pulleys, traction pulleys, electronic data Displays tension gauges, strands, tractors and slides. The utility model can realize the accurate measurement of the friction resistance of the ball-joint interface of different tonnages, ball-joint sizes and ball-joint materials, is used for guiding engineering construction, and provides theoretical basis and data reference for actual engineering construction; the utility model can also be used for measuring The friction coefficient of different ball joint interface lubricant materials is used for the research and development of rotating ball joint interface lubricant materials.

Description

A device for measuring the interfacial frictional resistance of a horizontally rotating spherical hinge

technical field

The utility model relates to the technical field of traffic civil engineering, in particular to a device for measuring the interface friction resistance of a spherical hinge of a horizontal rotating body.

Background technique

With the accelerated development of highway and railway infrastructure in recent years, the density of my country's road network has increased significantly, and the issue of three-dimensional intersections between new bridges and existing highways and railways has become increasingly common. In order to reduce the impact of the upward bridge construction on the downward traffic (especially the railway operation), more and more bridges will be constructed with horizontal rotation. In the process of swivel bridge construction, the swivel spherical hinge part is the core component of the bridge swivel, which mainly plays the role of bearing the quality of the upper structure, and can also be used as a balance system to adjust the bridge posture and control the eccentric distance of the swivel structure.

Under the self-weight of the superstructure of the bridge, the relative displacement between the upper and lower spherical hinges during the rotation of the spherical hinges will cause sliding friction and sliding friction between the two spherical hinges, and the frictional resistance between the upper and lower spherical hinges determines the friction between the spherical hinges. Frictional resistance, because the frictional resistance of the rotating body not only directly affects the traction force required when the bridge rotates, but also affects the inertial rotation distance of the rotating body in a stable position, so it is very critical to accurately obtain the interface friction resistance of the spherical hinge of the horizontal rotating body. At present, the determination of the interfacial frictional resistance of the horizontal rotating spherical hinge is mainly based on the combination of theoretical calculation and field measurement. By treating the entire rotating body as a rigid body and applying a rotating torque, the rotating body will rotate as a rigid body around the spherical hinge. Under the action of the balance torque and the static friction torque, it is just in the critical state of torque balance. According to the static balance equation, the unbalanced torque of the rotating body can be obtained, and the calculation mathematical model of the friction torque of the ball joint can be established, and the friction torque of the ball joint can be deduced. and the formula for calculating the coefficient of static friction. Among them, the unbalanced moment of the bridge and the frictional moment of the spherical hinge can be obtained through the unbalanced weighing test test of the spherical hinge method.

At present, there are few related researches on the measurement of the interfacial frictional resistance of the horizontal swivel spherical hinge, especially there are almost no tests on the measurement of the interfacial frictional resistance of the horizontal swivel spherical hinge. In order to accurately obtain the frictional resistance at the interface of the horizontal swivel spherical hinge, it is necessary to develop a measuring device and a test method that can test the frictional resistance of the horizontal swivel spherical hinge interface, and this test method can be used to develop different swivels Ball joint interface lubricant. In addition, by developing a measuring device and testing method for the interfacial friction resistance of an indoor horizontal swivel spherical hinge, it can be used to guide engineering construction and provide theoretical basis and data reference for actual engineering construction.

Utility model content

For this reason, the purpose of this utility model is to propose a kind of measuring device of the friction resistance of the interface of the horizontal rotating body spherical hinge, and its concrete technical scheme is as follows:

A device for measuring the interface friction resistance of a horizontally rotating spherical hinge, comprising:

A spherical hinge structure, the spherical hinge structure includes an upper spherical hinge structure, a lower spherical hinge structure, and a positioning pin installed at the center of the upper spherical hinge structure and the lower spherical hinge structure; the upper spherical hinge structure and all The lower spherical hinge structure can rotate relative to the positioning pin shaft; the lower spherical hinge structure is fixed to the ground through the spherical hinge positioning bracket;

Loading system, the loading system includes a loading plate, several supporting feet, a spirit level, a self-weight block and a self-weight block placing rack; the bottom of the loading plate is fixed with the upper spherical hinge structure and the upper spherical hinge structure is filled with Active powder concrete; the self-weight block placement rack is installed on the top of the loading plate, and the self-weight block is detachably fixed in the self-weight block placement rack; a plurality of the support feet are vertically fixed on the loading plate The bottom is arranged around the spherical hinge structure, the support feet are suspended on the ground; the level is installed on the support feet;

a traction system, the traction system is integrally installed on the outer side of the spherical hinge structure, and includes four angle-adjusting fixed pulleys, a traction pulley, two electronic digital tension gauges, steel strands, a traction machine and a slideway; Both ends of the steel strand are fixed on the upper spherical hinge structure; a first angle adjustment fixed pulley and a second angle adjustment fixed pulley are respectively fixed on both sides of the upper spherical hinge structure. The slideway is fixed at the outer position between the connection line between an angle-adjusting fixed pulley and the second angle-adjusting fixed pulley, the traction pulley is located in the slideway, and the slideway is close to the upper ball hinge The two sides of one side of the structure are also respectively fixed with a third angle adjustment fixed pulley and a fourth angle adjustment fixed pulley; the steel strand passes through the first angle adjustment fixed pulley in sequence from one end to the other end. , the third angle adjustment fixed pulley, the traction pulley, the fourth angle adjustment fixed pulley and the second angle adjustment fixed pulley; the end of the traction pulley away from the upper spherical hinge structure is The traction machines are connected; the two electronic digital display tension gauges are respectively installed on the steel strands on both sides of the upper spherical hinge structure.

The utility model is a device for measuring the interface friction resistance of a horizontal rotating body spherical hinge, which can realize the measurement of the interface friction resistance of the spherical hinge with different tonnage, the size of the spherical hinge and the spherical hinge material, which is used to guide the engineering construction and provide a theoretical basis for the actual engineering construction. and data reference; at the same time, the utility model can also be used to measure the friction coefficient of different ball joint interface lubricating materials, and is used for the research and development of rotating ball joint interface lubricating materials.

In addition, the traction system of the present invention reduces the demand for multiple traction machines, effectively saves costs, and has good expansibility.

On the basis of the above-mentioned technical scheme, the utility model can also make the following improvements:

Preferably, the steel strands connected between the first angle adjustment fixed pulley, the second angle adjustment fixed pulley and the upper spherical hinge structure are parallel to each other.

The above technical features can ensure that the force on both sides of the upper spherical hinge structure is always equal and in opposite directions during the rotation process; at the same time, the steel strands are welded on the upper spherical hinge structure, and the steel strands on both sides of the upper spherical hinge structure are parallel. , in this way, it will only be affected by the bending moment during the rotation process, and there will be no additional force, which can effectively avoid the generation of lateral force on the upper spherical hinge structure and ensure that the test results are true and accurate.

Preferably, the slideway is fixed on the center line of the connecting line between the first angle-adjusting fixed pulley and the second angle-adjusting fixed pulley.

Preferably, the distance between the third angle-adjusting fixed pulley and the fourth angle-adjusting fixed pulley is equal to the diameter of the traction pulley.

The third angle adjustment fixed pulley and the fourth angle adjustment fixed pulley are used to ensure that the force angle is unchanged during the rotation process, and the rotation speed is controllable.

The utility model limits the slideway to be fixed on the center line of the connecting line between the first angle adjustment fixed pulley and the second angle adjustment fixed pulley, and the distance between the third angle adjustment fixed pulley and the fourth angle adjustment fixed pulley and the The diameters of the traction pulleys are equal to ensure that the upper spherical hinge structure is balanced in force and stable in speed during the rotation process.

Preferably, a margin of 5-10 cm is reserved between the support feet and the ground to prevent the test device from overturning during the rotation process.

Preferably, the radius of the positioning pin is smaller than the radius of the space left by the center of the upper and lower spherical hinge structures, so as to avoid contact errors during the rotation process.

Preferably, lubricating oil is smeared on the positioning pin, the steel strand, the angle-adjusting and fixing pulley, the traction pulley and the slideway, so as to reduce the loss during the traction process.

Preferably, the self-weight block is a rectangular sand box, and the sand box is filled with sand and gravel.

The weight of the self-weight block can be filled with sand and gravel according to different requirements. The load system can simulate the bridge weight of different tonnages by increasing or decreasing the number of self-weight blocks, and ensure the force balance of the upper spherical hinge structure.

Preferably, the electronic digital tension gauge has two working modes: continuous detection and peak detection, and retains a standard sensor output interface for connecting to a computer for data analysis.

The electronic digital display tension meter is installed on the steel strands on both sides of the upper spherical hinge structure, and is used to feedback the tension value of the upper spherical hinge structure during the rotation process in real time.

The utility model further discloses a method for testing the interface friction resistance of a horizontal rotating spherical hinge, comprising the following specific steps:

1) According to the horizontal rotating spherical hinge used for the installation test of the measuring device described in the above, the size, curvature and material of the spherical hinge can be customized according to requirements;

2) Increase or decrease the number of the self-weight blocks according to the bridge tonnage requirements, and adjust the spatial position of the upper structure of the measuring device through the level and the jack on the support feet to ensure that the entire device is in the horizontal center;

3) Set the rotation speed according to the requirements, start the traction machine, record the data of the two electronic digital display tension meters on both sides of the upper spherical hinge structure, according to the collected traction force Fw and the upper bridge body of the spherical hinge. The total weight Wz, the friction coefficient μ of the ball-joint interface is calculated:

4) By adjusting the position of the steel strand, start the traction machine again, and restore the test device, thereby completing the measurement of the interface friction resistance of the entire swivel ball joint.

Preferably, the restoration of the test device in the above step 4 is by adjusting the position of the steel strand, and the original right side of the steel strand is placed on the angle adjustment fixed pulley on the left side of the upper spherical hinge structure, Originally, the steel strand on the left side rides on the angle-adjusting fixed pulley on the right side of the upper spherical hinge structure for traction, so as to realize the reverse rotation of the upper spherical hinge structure.

Compared with the prior art, the utility model has the following advantages and effects:

1. The utility model can realize the friction resistance measurement of horizontal rotating spherical hinges of different specifications and materials by processing spherical hinges with different curvatures, sizes and materials. In addition, this test method can be used to determine the friction coefficient of different ball-joint interface lubricating materials, which can be used for the research and development of rotating ball-joint interface lubricating materials. The test device of the utility model can be used as a multifunctional test instrument and has good generalization.

2. By introducing a self-developed traction system, the utility model can ensure that the forces on both sides of the upper spherical hinge structure are always equal and in opposite directions, effectively avoiding the generation of lateral forces on the spherical hinge, and more realistically simulating the rotation of the actual horizontal swivel bridge. To ensure that the test results are true and accurate.

3. The utility model sets four angle-adjusting fixed pulleys, and installs four angle-adjusting fixed pulleys (fixed pulleys), traction pulleys (moving pulleys) and slideways on the outside of the spherical hinge structure to change the transmission of force. direction, reduce the traction loss, and ensure that the ball joint is balanced and stable in the rotation process, and the rotation speed is stable.

4. The traction system of the present invention is provided with only one traction machine, which reduces the demand for multiple traction machines and effectively saves costs.

5. The load system of the utility model can realize the measurement of the friction resistance of the horizontal rotating spherical hinge under different tonnages, which breaks through the limitation of a single load and enriches the test data.

Description of drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the following briefly introduces the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description It is only an embodiment of the present invention, and for those of ordinary skill in the art, other drawings can also be obtained according to the provided drawings without creative efforts.

Figure 1 is a schematic structural diagram of a traction system in a device for measuring the interface friction resistance of a horizontal rotating body spherical hinge of the present invention.

Figure 2 is a schematic structural diagram of the angle-adjusting fixed pulley in the traction system of the utility model.

Figure 3 is a schematic structural diagram of a traction pulley and a traction machine in the traction system of the present invention.

4 is a schematic structural diagram of the lower spherical hinge structure and the spherical hinge positioning bracket in the spherical hinge structure of the present invention.

Figure 5 is a schematic structural diagram of a load system in a device for measuring the interface friction resistance of a horizontal rotating body spherical hinge of the present invention.

The accompanying drawing of FIG. 6 is a schematic diagram of the reset of a device for measuring the interface friction resistance of a horizontal rotating body spherical hinge of the present invention.

Among them, in the figure,

1- Upper spherical hinge structure, 2- Lower spherical hinge structure, 3- Positioning pin, 4- Ball hinge positioning bracket, 5- Loading plate, 6- Support foot, 7- Self-weight block-, 8- Self-weight block placement rack, 9 - The first angle adjustment fixed pulley, 10 - the second angle adjustment fixed pulley, 11 - the slideway, 12 - the traction pulley, 13 - the third angle adjustment fixed pulley, 14 - the fourth angle adjustment fixed pulley, 15 -Steel wire, 16-tractor, 17-electronic digital tension gauge, 18-ground.

Detailed ways

The following describes in detail the embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary, and are intended to be used to explain the present invention, but should not be construed as a limitation of the present invention.

In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top" , "bottom", "inside", "outside", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that A device or element must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be construed as a limitation of the present invention.

In addition, the terms "first" and "second" are only used for descriptive purposes, and should not be construed as indicating or implying relative importance or implying the number of indicated technical features. Thus, a feature defined as "first" or "second" may expressly or implicitly include one or more of that feature. In the description of the present invention, "plurality" means two or more, unless otherwise expressly and specifically defined.

In the present utility model, unless otherwise expressly specified and limited, the terms "installation", "connection", "connection", "fixed" and other terms should be understood in a broad sense, for example, it may be a fixed connection or a detachable connection Connection, or integration; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal communication between the two elements or the interaction relationship between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

In the present invention, unless otherwise expressly specified and limited, a first feature "on" or "under" a second feature may include the first and second features in direct contact, or may include the first and second features The features are not in direct contact but through additional features between them. Also, the first feature being "above", "over" and "above" the second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is level higher than the second feature. The first feature is "below", "below" and "below" the second feature includes the first feature being directly below and diagonally below the second feature, or simply means that the first feature has a lower level than the second feature.

Example:

The following describes in detail a device for measuring the interface frictional resistance of a spherical hinge of a horizontal rotating body in an embodiment of the present invention according to FIGS. 1-6 .

On the one hand, as shown in Figures 1-5, the embodiment of the present utility model discloses a device for measuring the interfacial friction resistance of a spherical hinge of a horizontal rotating body, which includes a spherical hinge structure, a load system, and a traction system.

specific,

The spherical hinge structure includes an upper spherical hinge structure 1, a lower spherical hinge structure 2, and a positioning pin 3 installed at the center of the upper spherical hinge structure 1 and the lower spherical hinge structure 2; the upper spherical hinge structure 1 and the lower spherical hinge structure 2 can be opposite to each other. The positioning pin 3 rotates.

The positioning pin 3 is installed at the center of the upper and lower spherical hinge structures 2 to prevent the device from becoming unstable due to the deviation of the upper and lower spherical hinges during the rotation of the upper spherical hinge structure 1; at the same time, the installation of the positioning pin 3 It is also possible to prevent the test apparatus from tipping over.

Further, the radius of the positioning pin shaft 3 should be smaller than the radius of the space left by the center of the upper and lower spherical hinge structures, so as to avoid contact errors during the rotation process.

The lower spherical hinge structure 2 is fixed to the ground 18 through the spherical hinge positioning bracket 4 to ensure the stability of the lower structure during the test.

The loading system includes a loading plate 5 , several supporting feet 6 , a spirit level, a self-weight block 7 and a self-weight block placement rack 8 .

The bottom of the loading plate 5 is fixed to the upper spherical hinge structure 1 and the interior of the upper spherical hinge structure 1 is filled with active powder concrete.

A self-weight block placement rack 8 is installed on the top of the loading plate 5, and the self-weight block 7 is detachably fixed in the self-weight block placement rack 8. The self-weight block placement rack 8 is mainly used to fix the self-weight block 7 to prevent the self-weight block 7 during the rotation process. Displacement occurs.

Further, the self-weight block 7 in the above is a rectangular sand box, and the sand box can be filled with sand and gravel according to the weight requirements of a single self-weight block 7 . In this embodiment, the self-weight block 7 is preferably a sand box of 100*100*30cm rectangular parallelepiped.

The load system can simulate the bridge weights of different tonnages by increasing or decreasing the number of self-weight blocks 7, and ensure the force balance of the upper spherical hinge structure 1.

Several supporting feet 6 (four in this embodiment) are vertically welded and fixed to the bottom of the loading plate 5 and arranged around the spherical hinge structure. The supporting feet 6 are suspended from the ground 18 .

Further, the support feet 6 are welded to the lower part of the loading plate 5 and have a margin of 5-10 cm with the ground 18 to prevent the test device from overturning.

A spirit level (not shown in the figure) is installed on the support feet 6, and it is judged whether the device is level and centered by observing the position of the air bubbles in the spirit level of each support leg 6. That is to say, the spirit level is used to control the spatial position of the superstructure of the spherical joint and the load system to ensure that the whole device is level and centered.

The traction system is integrally installed on the outer side of the spherical hinge structure, which includes four fixed pulleys for angle adjustment, one traction pulley 12 , two electronic digital tension gauges 17 , steel strands 15 , tractors 16 and slideways 11 .

Both ends of the steel strand 15 are welded and fixed on the upper spherical hinge structure 1 , and the rotation of the upper spherical hinge structure 1 is pulled by the angle adjustment fixed pulley, the traction pulley 12 and the tractor 16 .

A first angle adjustment fixed pulley 9 and a second angle adjustment fixed pulley 10 are respectively fixed on both sides of the upper spherical hinge structure 1 . A slideway 11 is fixed at the outer position of the space between the two sides, the traction pulley 12 is located in the slideway 11, and the two sides of the slideway 11 close to the upper ball hinge structure 1 are also respectively fixed with a third angle adjustment fixed pulley 13 and a fourth angle adjustment The fixed pulley 14; the steel strand 15 passes through the first angle adjustment fixed pulley 9, the third angle adjustment fixed pulley 13, the traction pulley 12, the fourth angle adjustment fixed pulley 14 and the fourth angle adjustment fixed pulley from one end to the other end. The second angle adjusts the fixed pulley 10 ; the end of the traction pulley 12 away from the upper spherical hinge structure 1 is connected to the tractor 16 .

Further, the steel strands 15 connected between the first angle adjustment fixed pulley 9, the second angle adjustment fixed pulley 10 and the upper spherical hinge structure 1 are parallel to each other to ensure that the upper spherical hinge structure 1 is on both sides during the rotation process. The magnitude of the force is always equal and the direction is opposite; at the same time, the steel strand 15 is welded on the upper spherical hinge structure 1, and the steel strands 15 on both sides of the upper spherical hinge structure 1 are parallel. Bending moment action, without additional force, can effectively avoid the generation of lateral force on the upper spherical hinge structure 1, and ensure the true and accurate test results.

In this embodiment, the third angle-adjusting fixed pulley 13 and the fourth angle-adjusting fixed pulley 14 are used to ensure that the force angle is constant during the rotation process, and the rotation speed is controllable.

Further, the slideway 11 is fixed on the center line connecting the first angle adjustment fixed pulley 9 and the second angle adjustment fixed pulley 10, and the third angle adjustment fixed pulley 13 and the fourth angle adjustment fixed pulley 14. The distance between them is equal to the diameter of the traction sheave 12, so as to ensure that the ball joint receives a balanced force and a stable speed during the rotation.

In this embodiment, four angle-adjusting fixed pulleys (fixed pulleys), traction pulleys 12 (moving pulleys), and slideways 11 are installed on the outside of the spherical hinge structure to change the direction of force transmission, reduce traction loss, and ensure the spherical hinge. During the rotating process, the force is balanced and stable, and the rotation speed is stable.

Further, in this embodiment, lubricating oil is smeared on the positioning pin 3, the steel strand 15, the angle-adjusting fixed pulley, the traction pulley 12 and the slideway 11 to reduce the loss during the traction process.

Two electronic digital display tension gauges 17 are respectively installed on the steel strands 15 on both sides of the upper spherical hinge structure 1, and are used for real-time feedback of the tension value during the rotation of the spherical hinge.

Further, the electronic digital tension gauge 17 has two working modes: continuous detection and peak detection, and retains a standard sensor output interface for connecting to a computer for data analysis.

The embodiment of the utility model also discloses a method for testing the frictional resistance of the horizontal rotating spherical hinge interface, which includes the following specific steps:

1) According to the horizontal rotating spherical hinge used for the installation test of the measuring device described in the above embodiment, the lower spherical hinge structure 2 in the spherical hinge structure is fixed to the ground 18 through the spherical hinge positioning bracket 4, and the upper spherical hinge structure 1 is connected to the loading plate. 5. Welded and filled with active powder concrete; the positioning pin 3 is installed at the center of the upper and lower spherical hinges; The size, curvature and material of the hinge can be customized upon request;

2) Increase or decrease the number of self-weight blocks 7 according to the bridge tonnage requirements, and judge whether the device is horizontal and centered by observing the position of the air bubbles in the spirit level on each support foot 6, and then adjust the spatial position of the upper structure of the measuring device through the jack to ensure that the entire device is in the correct position. horizontal center;

3) Set the rotation speed according to the requirements, start the tractor 16, record the data of the two electronic digital display tension gauges 17 on both sides of the upper spherical hinge structure 1, and input the data into the computer in real time through the interface, and then pass the corresponding data. The processing program calculates the friction coefficient of the ball joint interface and displays it in real time;

According to the collected traction force Fw and the total weight Wz of the upper bridge body of the ball joint, the friction coefficient μ of the ball joint interface can be calculated:

4) By adjusting the position of the steel strand 15, start the tractor 16 again, and restore the test device, so as to complete the measurement of the interface friction resistance of the entire swivel ball joint;

Specifically, as shown in FIG. 6 , the restoration of the test device is performed by adjusting the position of the steel strand 15 and placing the original right steel strand 15 on the angle-adjusting fixed pulley on the left side of the upper spherical hinge structure 1 , that is, The No. Ⅱ steel strand in the pictures a and b in Fig. 6 was originally laid on the second angle adjustment fixed pulley 10. When restored, the No. Ⅱ steel strand was laid on the No. 2 steel strand as shown in the figures c and d. An angle adjustment fixed pulley 9; the original left steel strand 15 is placed on the angle adjustment fixed pulley on the right side of the upper spherical hinge structure 1, that is, the No. 1 steel strand in Fig. 6 a and b was originally It is placed on the first angle adjustment fixed pulley 9. When restoring, the No. 1 steel strand is placed on the second angle adjustment fixed pulley 10 as shown in figures c and d; The reverse rotation of the upper spherical hinge structure 1 is achieved.

The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments, and the same and similar parts between the various embodiments can be referred to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant part can be referred to the description of the method.

The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Thus, the present invention is not intended to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (10)

1. The utility model provides a survey device of spherical hinge interface frictional resistance of horizontal rotation which characterized in that includes:

the spherical hinge structure comprises an upper spherical hinge structure (1), a lower spherical hinge structure (2) and a positioning pin shaft (3) arranged at the centers of the upper spherical hinge structure (1) and the lower spherical hinge structure (2); the upper spherical hinge structure (1) and the lower spherical hinge structure (2) can rotate relative to the positioning pin shaft (3); the lower spherical hinge structure (2) is fixed with the ground (18) through a spherical hinge positioning support (4);

the loading system comprises a loading plate (5), a plurality of supporting feet (6), a level, a self-weight block (7) and a self-weight block placing rack (8); the bottom of the loading plate (5) is fixed with the upper spherical hinge structure (1), and the interior of the upper spherical hinge structure (1) is filled with active powder concrete; the top of the loading plate (5) is provided with the dead weight block placing frame (8), and the dead weight block (7) is detachably fixed in the dead weight block placing frame (8); the supporting feet (6) are vertically fixed at the bottom of the loading plate (5) and arranged around the spherical hinge structure, and the supporting feet (6) are suspended on the ground (18); the level gauge is arranged on the supporting foot (6);

the traction system is integrally arranged on the outer side of the spherical hinge structure and comprises four angle positioning fixed pulleys, a traction pulley (12), two electronic digital display tension meters (17), a steel strand (15), a traction machine (16) and a slide way (11); two ends of the steel strand (15) are fixed on the upper spherical hinge structure (1); a first angle positioning fixed pulley (9) and a second angle positioning fixed pulley (10) are respectively fixed on two sides of the upper spherical hinge structure (1), the slide way (11) is fixed at the outer side position between connecting lines of the first angle positioning fixed pulley (9) and the second angle positioning fixed pulley (10), the traction pulley (12) is positioned in the slide way (11), and a third angle positioning fixed pulley (13) and a fourth angle positioning fixed pulley (14) are respectively fixed on two sides of the slide way (11) close to one side of the upper spherical hinge structure (1); the steel strand (15) sequentially penetrates through the first angle positioning fixed pulley (9), the third angle positioning fixed pulley (13), the traction pulley (12), the fourth angle positioning fixed pulley (14) and the second angle positioning fixed pulley (10) from one end to the other end; one end of the traction pulley (12) far away from the upper spherical hinge structure (1) is connected with the traction machine (16); the two electronic digital display tension meters (17) are respectively arranged on the steel stranded wires (15) on two sides of the upper spherical hinge structure (1).

2. The device for measuring the interfacial frictional resistance of the horizontal swivel ball joint according to claim 1, wherein the steel strands (15) connected between the first angle-adjusting fixed pulley (9), the second angle-adjusting fixed pulley (10) and the upper ball joint structure (1) are parallel to each other.

3. The device for measuring the frictional resistance of the interface of the horizontal swivel ball joint according to claim 1, wherein the slideway (11) is fixed on the central line of the connecting line of the first angle-adjusting fixed pulley (9) and the second angle-adjusting fixed pulley (10).

4. A device for measuring the frictional resistance at the interface of a horizontal swivel ball joint according to claim 3, wherein the distance between the third angular position-adjusting fixed pulley (13) and the fourth angular position-adjusting fixed pulley (14) is equal to the diameter of the traction pulley (12).

5. The device for measuring the frictional resistance of the interface of the horizontal swivel ball joint according to claim 1, wherein the supporting legs (6) are left with a margin of 5-10 cm from the ground (18).

6. The device for measuring the frictional resistance of the interface of the horizontal swivel ball joint according to claim 1, wherein the radius of the positioning pin shaft (3) is smaller than the radius of the space reserved by the centers of the upper and lower ball joint structures.

7. The device for measuring the frictional resistance of the interface of the horizontal swivel ball joint according to claim 1, wherein lubricating oil is coated on the positioning pin shaft (3), the steel strand (15), the angle-adjusting fixed pulley, the traction pulley (12) and the slide way (11).

8. The device for measuring the frictional resistance of the interface of the horizontal swivel ball joint according to claim 1, wherein the self-weight block (7) is a rectangular sand box filled with sand.

9. The device for measuring the frictional resistance of the interface of the horizontal swivel ball joint as claimed in claim 1, wherein the simulation of bridges with different tonnages can be realized by increasing or decreasing the number of the self-weight blocks (7).

10. The device for measuring the frictional resistance of the interface of the horizontal swivel ball joint according to any one of claims 1 to 9, wherein the electronic digital display tension meter (17) has two working modes of continuous detection and peak detection, and a standard sensor output interface is reserved for connecting a computer for data analysis.

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