Hob abrasion testing device

Abstract

The utility model discloses a hob abrasion testing device which comprises a stone roller. The stone roller is located on the supporting roller mechanism and can rotate; the hobbing cutter is rotatably mounted in the cutter rest, and one end of the hobbing cutter is connected with the first motor; a hob ring of the hob abuts against the upper end of the stone roller, and the axis of the hob ring is perpendicular to the axis of the stone roller. The tool rest and the motor are fixedly connected to the lower end of the frame component, and the frame component is connected to the upper end of the lifting mechanism and used for lifting the frame component. According to the utility model, radial rotation wear and axial sliding wear of the hob can be simulated at the same time, a continuous wear test is adopted, the actual working state of the hob is close, the wear mechanism and characteristics of the hob are convenient to research, the occupied space is small, and the test efficiency is high.

Description

Technical Field

[0001] The utility model belongs to the technical field of shield machine cutter head manufacturing, in particular to a roller cutter wear testing device. Background Art

[0002] The roller cutter on the cutterhead of a tunnel boring machine is a consumable part that is replaced most frequently. It is in direct contact with the rock and soil, and its wear amount varies under different conditions. During the excavation process, the cutter is prone to the following problems: cutter ring wear, cutter ring string wear, cutter ring breakage, oil leakage, and bearing damage. In order to obtain relevant data on the friction and wear of the cutter in a better, more economical, and safer way, so as to improve the cutter and increase the product life, a simulation test device is needed to simulate the working state of the roller cutter on the cutterhead. However, due to the huge size of the cutterhead, direct simulation testing requires more space; in addition, the actual use of the roller cutter includes radial rotation wear and axial sliding wear, which makes it difficult to simulate the actual working conditions of the roller cutter.

[0003] In the prior art, the first type, such as the patent "Roller Wear Test Experimental Platform and Supporting Measurement and Evaluation Method" with publication number CN107687984A, whose experimental platform is a static wear test device, only simulates the radial rotation wear of the roller, and has incomplete functions. The second type, such as the patent "A Hard Rock Roller Rock Breaking Characteristics Test Device" with publication number CN103969141B, is a device that sets the rock sample on a horizontal sliding mechanism, and the rock sample reciprocates to simulate the friction between the roller and the rock sample in two directions. The problem is that the reciprocating movement mode belongs to a non-continuous working state, which is not completely consistent with the actual working state of the roller on the cutterhead. Summary of the invention

[0004] In order to overcome the shortcomings of the background technology, the utility model provides a roller cutter wear testing device, the purpose of which is to reflect the actual working state of the roller cutter on the cutter disc as much as possible, simulate the radial rotation wear and axial sliding wear of the roller cutter, adopt continuous wear testing to avoid reciprocating movement, so as to simulate the roller cutter wear process, study the wear mechanism and characteristics of the roller cutter, thereby increasing the service life of the roller cutter.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A roller cutter wear testing device comprises a cylindrical stone roller for abrading the roller cutter; the stone roller is seated on a supporting roller mechanism so that the stone roller can rotate around its axis; the roller cutter is rotatably installed in a tool holder, one end of which is connected to a first motor for driving the roller cutter to rotate; the cutter ring of the roller cutter abuts against the upper end of the stone roller, and its axis is arranged perpendicular to the axis of the stone roller; the tool holder and the motor are fixedly connected to the lower end of a frame component, and the frame component is connected to the upper end of a lifting mechanism so that the frame component can be lifted and lowered.

[0007] As a further optimization, the support roller mechanism includes a base, a support roller assembly, and a second motor; the support roller assembly includes a plurality of rotatable support rollers arranged on the upper surface of the base, and the plurality of support rollers are evenly distributed at the bottom of the stone roller for supporting the rotation of the stone roller; at least one of the support rollers is torque-connected to the second motor installed on the base for driving the support roller to rotate.

[0008] As a further optimization, the lifting mechanism includes a column, the lower end of the column is fixedly connected to the base, the upper end of the column is fixedly provided with a cylinder, the upper end of the cylinder is connected to the frame component, and is used to drive the frame component to rise and fall by extending and retracting the cylinder.

[0009] As a further optimization, the lower end of the frame component is fixedly connected to a motor bracket, and the first motor is fixedly connected to the motor bracket, so that the motor is fixedly connected to the lower end of the frame component.

[0010] As a further optimization, there are multiple tool holders connected to the lower end of the frame component, which are arranged at intervals along the axial direction of the stone roller. Each of the tool holders is provided with the roller, and each roller is connected to one of the first motors, so that each roller can rotate independently.

[0011] As a further optimization, it also includes an axial support mechanism; there are two axial support mechanisms, which are respectively arranged on the outside of the two end surfaces of the stone roller; each of the axial support mechanisms includes a support column with a lower end fixedly connected to the base, a rotatable shaft is provided at the upper end of the support column, a support plate is fixed at one end of the shaft, and the outer end surface of the support plate is supported on the center of the end surface of the stone roller.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] (1) This device can simulate the radial rotation wear and axial sliding wear of the hob at the same time, which is close to the actual working state and has high test credibility.

[0014] (2) This device can work continuously and can verify the continuous working performance of the hob.

[0015] (3) The device has a compact structure, occupies a small space, has low cost, and has high testing efficiency.

[0016] In short, this device can simulate the radial rotation wear and axial sliding wear of the hob at the same time, and adopts continuous wear test, which is close to the actual working state of the hob, making it convenient to study the wear mechanism and characteristics of the hob, and it occupies little space and has high test efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1It is a schematic diagram of the structure of the embodiment 1 of the utility model, but the axial support mechanism is omitted;

[0018] Figure 2 for Figure 1 Left side view of the device, but the lifting mechanism is omitted.

[0019] The correspondence between the technical features and the reference numerals in the figure is: stone roller 1; supporting mechanism 2; base 21; supporting roller 22; second motor 23; tool holder 3; hob 31; first motor 32; frame component 4; column 41; cylinder 42; motor bracket 43; supporting column 5; rotating shaft 51; support plate 52. DETAILED DESCRIPTION

[0020] The following is a clear and complete description of the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings of the present invention. Obviously, the described embodiments are only a part of the preferred embodiments of the present invention, rather than all the embodiments. It should be understood by those skilled in the art that these implementation methods are only used to explain the technical principles of the present invention and are not intended to limit the scope of protection of the present invention.

[0021] Example 1: Please refer to Figure 1-2 ;

[0022] The utility model provides the following technical solutions: a roller cutter wear testing device, comprising a cylindrical stone roller 1 for abrading a roller cutter 31; the stone roller 1 is located on a supporting roller mechanism, and is used for the stone roller 1 to rotate around its axis; the roller cutter 31 is rotatably installed in a tool holder 3, one end of which is connected to a first motor 32, and is used for driving the roller cutter 31 to rotate; the cutter ring of the roller cutter 31 is against the upper end of the stone roller 1, and its axis is arranged perpendicular to the axis of the stone roller 1; the tool holder 3 and the motor are fixedly connected to the lower end of a frame component 4, and the frame component 4 is connected to the upper end of a lifting mechanism, and is used for the frame component 4 to be lifted and lowered.

[0023] The working principle includes: the roller 31 is connected to the first motor 32 so that it can rotate, and the stone roller 1 located on the support roller 22 can rotate. Since the axis of the roller 31 is arranged perpendicular to the axis of the roller 1, the rotation of the roller 1 simulates the axial sliding wear of the roller 31, and the rotation of the roller 31 itself simulates the radial rotation wear of the roller 31; at the same time, the roller 1 and the roller 31 can rotate continuously, which belongs to the continuous working state, which is very close to the actual working state of the roller 31 on the cutter disc. In addition, the cutting ring of the roller 31 is controlled by the lifting mechanism to always contact with the roller 1. Even when the roller 1 is worn, the wear of the roller 1 can be compensated by the lifting mechanism. In addition, the contact pressure between the roller 31 and the roller 1 can also be controlled by the lifting mechanism to simulate the wear of the roller 31 under different pressures. Therefore, the device has many controllable parameters, which are close to the actual working state of the hob 31 on the cutter disc. The wear test of the hob 31 has high credibility, which is conducive to studying the wear mechanism and characteristics of the hob 31, thereby improving the service life of the hob 31 product.

[0024] Exemplarily, the support roller mechanism includes a base 21, a support roller assembly, and a second motor 23; the support roller assembly includes a plurality of rotatable support rollers 22 disposed on the upper surface of the base 21, and the plurality of support rollers 22 are evenly distributed at the bottom of the stone roller 1, for supporting the rotation of the stone roller 1; at least one of the support rollers 22 is torque-connected to the second motor 23 installed on the base 21, for driving the support roller 22 to rotate. Of course, multiple support rollers 22 can be connected to one motor, which has a greater driving force and a more uniform driving force, and the stone roller 1 is driven to rotate by friction through the active rotation of the support rollers 22.

[0025] Exemplarily, the lifting mechanism includes a column 41, the lower end of which is fixedly connected to the base 21, and the upper end of which is fixedly provided with a cylinder 42, the upper end of which is connected to the frame member 4, and is used to drive the frame member 4 to rise and fall by the extension and contraction of the cylinder 42. At least, there are multiple columns 41, which are evenly distributed around the frame member 4, so that when multiple cylinders 42 are extended and contracted at the same time, the frame member 4 is driven to rise and fall. Preferably, there are four columns 41, which are evenly distributed at the four corners of the frame member 4.

[0026] Regarding the installation of the first motor 32 , an exemplary manner is that the lower end of the frame component 4 is fixedly connected to the motor bracket 43 , and the first motor 32 is fixedly connected to the motor bracket 43 , so that the motor is fixedly connected to the lower end of the frame component 4 .

[0027] In order to improve the efficiency of the simulation test, there are multiple tool holders 3 connected to the lower end of the frame member 4, which are arranged at intervals along the axial direction of the stone roller 1. Each of the tool holders 3 is provided with a hob 31, and each hob 31 is connected to a first motor 32, so that each of the hobs 31 can rotate independently. In the accompanying drawings, two tool holders 3 are exemplified, and when the hobs 31 can rotate independently, the speed and rotation direction of the hobs 31 can be set respectively. In a test process, the wear effects of different parameters are simulated, thereby improving work efficiency.

[0028] In order to make the rotation of the stone roller 1 more stable, an axial support mechanism 2 is also included; there are two axial support mechanisms 2, which are respectively arranged on the outer sides of the two end surfaces of the stone roller 1; each of the axial support mechanisms 2 includes a support column 5 whose lower end is fixedly connected to the base 21, and a rotatable shaft 51 is arranged on the upper end of the support column 5, and a support plate 52 is fixedly arranged at one end of the shaft 51, and the outer end surface of the support plate 52 is supported at the center of the end surface of the stone roller 1. It can be seen that when the stone roller 1 rotates, the support rod rotates synchronously with the shaft 51, and the support column 5 is the installation base of the support rod and is immovable, so that the axial support mechanism 2 limits the possibility of axial movement of the stone roller 1 on the support roller mechanism, and the rotation of the stone roller 1 is more stable.

[0029] When in use, first place the stone roller 1, then raise the lifting mechanism, install the roller cutter 31 to be tested on the tool holder 3, and then start the supporting roller mechanism to drive the stone roller 1 to start rotating. Then, start the first motor 32. After the roller cutter 31 rotates, lower the lifting mechanism until the cutter ring of the roller cutter 31 abuts against the stone roller 1 and starts to wear. Perform the wear test according to the pre-set rotation speeds of the stone roller 1 and the roller cutter 31.

[0030] The advantages of this embodiment are:

[0031] (1) The device can simulate the radial rotation wear and axial sliding wear of the hob 31 at the same time, which is close to the actual working state and has high test credibility.

[0032] (2) The device can work continuously and can verify the continuous working performance of the hob 31.

[0033] (3) The device has a compact structure, occupies a small space, has low cost, and has high testing efficiency.

[0034] In summary, the device can simulate the radial rotation wear and axial sliding wear of the hob 31 at the same time, and adopts a continuous wear test, which is close to the actual working state of the hob 31, is convenient for studying the wear mechanism and characteristics of the hob 31, occupies little space and has high test efficiency.

[0035] The parts not described in detail in this utility model are prior art; for ordinary technicians in this field, the technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, all possible combinations of the technical features in the above-mentioned embodiments are not described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification. The scope of this utility model is defined by the attached claims and their equivalents.

Claims

1. A roller cutter wear testing device, comprising a cylindrical stone roller (1) for abrading a roller cutter (31); Features: The stone roller (1) lies horizontally on the supporting roller mechanism, so that the stone roller (1) can rotate around its axis; The roller cutter (31) is rotatably mounted in the cutter holder (3), and one end of the roller cutter (31) is connected to a first motor (32) for driving the roller cutter (31) to rotate; The cutter ring of the roller (31) abuts against the upper end of the stone roller (1), and its axis is arranged perpendicular to the axis of the stone roller (1); The tool holder (3) and the first motor (32) are fixedly connected to the lower end of the frame component (4), and the frame component (4) is connected to the upper end of the lifting mechanism so that the frame component (4) can be lifted and lowered.

2. The hob wear testing device according to claim 1, Features: The supporting roller mechanism comprises a base (21), a supporting roller assembly, and a second motor (23); The support roller assembly comprises a plurality of rotatable support rollers (22) arranged on the upper surface of the base (21), and the plurality of support rollers (22) are evenly distributed on the bottom of the stone roller (1) and are used to support the rotation of the stone roller (1); At least one of the support rollers (22) is torque-connected to the second motor (23) mounted on the base (21) to drive the support roller (22) to rotate.

3. The hob wear testing device according to claim 2, Features: The lifting mechanism comprises a column (41), the lower end of the column (41) is fixedly connected to the base (21), the upper end of the column (41) is fixedly provided with a cylinder (42), the upper end of the cylinder (42) is connected to the frame component (4), and is used to drive the frame component (4) to rise and fall by extending and retracting the cylinder (42).

4. The hob wear testing device according to claim 1, Features: The lower end of the frame component (4) is fixedly connected to a motor bracket (43), and the first motor (32) is fixedly connected to the motor bracket (43), so as to fix the first motor (32) to the lower end of the frame component (4).

5. The hob wear testing device according to claim 1, Features: There are multiple tool holders (3) connected to the lower end of the frame component (4), which are arranged at intervals along the axial direction of the stone roller (1). Each of the tool holders (3) is provided with a roller (31), and each roller (31) is connected to a first motor (32) so that each roller (31) can rotate independently.

6. The hob wear testing device according to claim 2, Features: It also includes an axial support mechanism (2); there are two axial support mechanisms (2), which are respectively arranged on the outer sides of the two end surfaces of the stone roller (1); Each of the axial support mechanisms (2) comprises a support column (5) whose lower end is fixedly connected to the base (21); a rotatable shaft (51) is provided at the upper end of the support column (5); a support plate (52) is fixedly provided at one end of the shaft (51); and the outer end surface of the support plate (52) is supported at the center of the end surface of the stone roller (1).

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