KR100960723B1 - Ice abrasion tester - Google Patents

Abstract

According to the present invention, the reciprocating motion and rotational motion of the specimens are simultaneously implemented in a constant temperature chamber capable of simulating the polar or ice-sea environment for a long time, so that the test results obtained by simultaneously performing the friction and abrasion tests can be efficiently compared. In addition, an ice wear tester is provided to maximize the reliability of the evaluation results and to simplify the device configuration according to the use of one constant temperature chamber.

The ice wear tester of the present invention is for performing a friction and abrasion test of a test piece made of ice as a relatively long time, and applies reciprocating motion and rotational motion for each of the test pieces 50 and 70 while applying glacier to ice. The main body 100 in which the first test module 150 and the second test module 170 are arranged in parallel, and the hydraulic unit 200 connected to supply hydraulic pressure to the first test module and the second test module. The cooling unit 300 is connected to supply cold air to the main body in a circulating manner.

Main unit, hydraulic unit, cooling unit, constant temperature chamber, machine room, ice loading room, control panel, first test module, second test module

Description

Ice ice abrasion tester {ICE ABRASION TESTER}

The present invention relates to an ice wear tester, and more particularly, to an ice wear tester in which friction and wear tests according to reciprocating and rotational motions are implemented in one system.

In general, polar operations vessels such as ice breaking vessels (ice breaking vessels) or ice going vessels (ice going vessels) operate in the extreme oceans of the cryogenic environment, etc., the demand is increasing according to the development of crude oil and natural gas.

These polar operating ships have many cases of coating damage due to frequent collisions and friction with ice, drift ice, ice ridge, etc. during operation, so that the icebreaker coating can maximize the overall durability against impact, friction, and abrasion even at cryogenic temperatures. There is an urgent need to develop a plan for the development and application of it, and the equipment for evaluating the developed paint is required.

Abrasion test apparatus according to the prior art, for example, the wear property test apparatus of the material of the Republic of Korea Patent No. 611567 in 2006, the high temperature and high pressure, such as in the deep sea conditions, the vacuum temperature difference in the space situation, the steam generator of a nuclear power plant The mechanical properties of the material are to be simulated by simulating the situation in which the pressure is automatically adjusted.

Since the wear test apparatus of the prior art can only perform general wear test by reciprocating motion, it is possible to derive a plurality of test results after simultaneously implementing the reciprocating motion and the rotational motion required for the characteristics test of the icebreaking paint mentioned above. Has no drawbacks.

In particular, the wear test apparatus of the prior art is designed to test only mechanical properties by a simple reciprocating motion, such as friction wear characteristics against the sea ice at the surface of the coating film, or a friction test based on general ice or sea ice, In other words, the ice-wear and friction tests are tested exclusively, and various factors related to friction such as temperature, surface roughness, ice contact area, sliding speed, and the like cannot be simulated in the light of the actual ship operating environment.

Ice has a lower temperature, lower salinity, and a lower strength, and a higher temperature or lower hardness.

Therefore, a special performance is required to facilitate handling, mounting, and the like of ice to be rubbed on the test piece, such as an ice column, due to the characteristics of the ice sheet test, but the wear test apparatus of the prior art has a disadvantage in that it cannot satisfy such a performance requirement.

In addition, the wear test apparatus of the prior art uses liquid nitrogen to create a low temperature environment, but the capacity of the storage tank (bombe) storing the liquid nitrogen is limited, so that the long-term test such as hundreds to thousands of hours is continued. It has a disadvantage that can not be performed.

Accordingly, the present invention has been made to solve the problems of the prior art as described above, by simultaneously implementing the reciprocating motion and rotational movement of the test piece in a constant temperature chamber that can simulate the polar or ice-sea environment for a long time, It is possible to efficiently compare the test results obtained by simultaneously performing the friction and wear test, to maximize the reliability of the evaluation results, and to provide an ice wear tester that can simplify the device configuration according to the use of one constant temperature chamber. Make it a technical task.

Another object of the present invention is to provide a basis for judging and evaluating ice friction and wear characteristics of ice-breaking paints, and to identify the film characteristic factors affecting the functions of ice-breaking paints and ultimately to establish a performance evaluation method of ice-breaking paints. It is possible to apply icebreaking paints with the best film quality in dry ships and to provide paint companies with ice-wear wear testers that can lead to the development of ice-breaking paints with higher performance.

It is still another object of the present invention to simulate various factors related to friction such as temperature, surface roughness, ice contact area, sliding speed, etc. in the light of actual ship operating environment, and provide reliable comparison data on the test results. An ice wear tester can be provided.

An object of the present invention as described above, as described in detail below, in the ice wear tester for performing a friction, wear test of the test piece with a relative relative to the ice for a relatively long time, applying the ice in the ice And a body in which a first test module and a second test module are arranged in parallel to implement a reciprocating motion and a rotational motion for each test piece. A hydraulic unit connected to supply hydraulic pressure to the first test module and the second test module; It is achieved by an ice wear tester comprising a cooling unit connected to supply the cold air to the body in a circulating manner.

In addition, according to the present invention, the main body is a constant temperature chamber disposed in the upper upper portion of the base frame, a machine chamber disposed in the rear upper portion, an ice mounting chamber disposed in the upper portion of the constant temperature chamber, and a control panel erected at the front corner of the ice mounting chamber. It is preferable to include.

Accordingly, the present invention compares the results of a plurality of tests as the friction test according to the reciprocation motion and the abrasion test according to the rotation motion are simultaneously performed in a constant temperature chamber capable of simulating the polar region or the sea ice environment for a long time. An advantage is to provide an ice wear tester that can increase the reliability of the evaluation results.

In addition, the ice wear tester of the present invention has a merit that can simulate the polar region or the sea ice environment for a relatively long time such as hundreds to thousands of hours including the main body, the hydraulic unit, the cooling unit.

In addition, the ice wear tester of the present invention has the advantage of easy to move or install by providing a body having a caster (caster) combined with a level adjustment.

In addition, the ice wear tester of the present invention provides a main body including a constant temperature chamber disposed at the front, a machine chamber disposed at the rear upper portion, an ice loading chamber disposed on the constant temperature chamber, a control panel erected at the front corner of the ice loading chamber, and the like. It has the advantages of easy operation and use and convenient cleaning and maintenance.

In addition, the ice wear tester of the present invention has a work window formed to penetrate both sides of the ice loading chamber, so that ice sheets prepared by simulating the polar region environment as ice to be in contact with the test piece can be easily mounted. There is an advantage that can easily perform the test preparation process by preventing the sticking phenomenon that occurs during the initial installation of the.

In addition, the ice wear tester of the present invention is configured to allow adjustment of temperature, sliding speed, contact pressure, friction distance, ice contact area, etc., and thus, ice friction and wear performance of materials for various combination conditions according to icebreaking operation environment. There is an advantage to be evaluated.

Hereinafter, with reference to the accompanying drawings will be described in detail an embodiment of the present invention.

1 is a perspective view of an ice wear tester according to an embodiment of the present invention, and FIG. 2 is a front view of the embodiment shown in FIG. 1. 3 is a plan view of the main body shown in FIG. 2, and FIG. 4 is a left side view of the main body shown in FIG. In addition, Figure 5 is a right side view of the main body shown in Figure 3, Figure 6 is an enlarged side view of the critical portion of the first test module shown in Figure 4, Figure 7 is an important portion of the second test module shown in FIG. An enlarged side view.

First, as shown in FIG. 1, the ice wear tester of the present invention includes a main body 100 in which the first test module 150 and the second test module 170 are arranged in parallel to simulate the polar or ice-sea environment. It is understood as the equipment including the hydraulic unit 200 and the cooling unit 300 connected to the main body 100.

The ice abrasion tester of the present invention performs ice friction and abrasion tests between ice and ice or ice and dissimilar materials (e.g., a test piece having a metal, polymer, icebreaking paint, comparative paint, etc. as a coating film) to be related to relative motion. In this way, at least the friction force of each of the reciprocating and rotational movements can be simultaneously measured, or the motion friction coefficient and the static friction coefficient can be calculated.

The terminology for understanding the ice wear tester according to the present invention is as follows.

The polar or ice-sea environment refers to conditions that can occur when a ship such as an icebreaker is operating. For example, continuous icebreaks in flat ice, impact icebreaks in thick ice, and operation in a widened channel behind a guided icebreaker. The ship may be caught in the gap between the ships and the ice, and the frictional resistance generated at that time will greatly increase the resistance of the broken ice and push the broken ice out of the ship's course. In the process, it is identified as resistance component by surface friction between hull and ice.

The test piece is a first test piece manufactured by applying one of ice-breaking paints and comparative paints (e.g., commercial epoxy paints used in ballast tanks) to a stainless steel plate member to have a predetermined coating thickness, or one of the paints is made of stainless hollow It may be a second test piece that is applied to the pipe member and manufactured to have a predetermined coating thickness. Here, any paint required to be tested by those skilled in the art is possible, so that the ice-breaking paint or the comparative paint is not particularly limited.

Ice is a material that is rubbed and abraded in correspondence with the test piece, and is frozen in sea ice having a compressive strength of 18 to 107 kg / cm2 or distilled water at a temperature of -30 ° C. It means an ice sheet having, an ice material selected according to the needs of those skilled in the art.

The kinematic friction coefficient is a friction coefficient measured while moving the specimen under the ice.

The static friction coefficient is the coefficient of friction measured immediately after the specimen has been temporarily stopped on ice.

Each coefficient of friction is expressed as the ratio of the frictional force to the normal force acting on the object (eg glacial or vertical ice loads).

In the present invention, the heater is installed in an ice wear tester such as an ice pack packing, an ice packer, a bushing installed at a boundary point, and prevents rapid contact with a metal surface when ice is mounted inside the ice pack, or It plays a role in preventing unexpected external force action that impedes reciprocation or rotational movement at the boundary point of mechanical components exposed to cryogenic temperature.

The main body 100 of the ice wear tester of this invention is comprised so that movement and installation are provided by providing the level adjustment and the stopper combined caster 101 in several places of the base frame 102.

The main body 100 includes a constant temperature chamber 110 disposed at the front upper portion of the base frame 102, a machine chamber 120 disposed at the rear upper portion, an ice loading chamber 130 disposed at an upper portion of the constant temperature chamber 110, and an ice loading chamber. Including a control panel 140 erected at the front corner of 130, it has an arrangement configuration that is easy to operate and use, and that is easy to clean and maintain.

In addition, if the main body 100 divides the left area and the right area along the longitudinal direction of the main body 100 in its center, the first test module 150 and the main body ( And a second test module 170 disposed at the right side of the 100.

The constant temperature chamber 110 of the main body 100 is connected to the cooling unit 300 to penetrate through the plurality of ducts 310 and the chamber piping 114 (see FIG. 4). That is, the duct 310 and the chamber piping 114 is composed of a plurality for cold air inlet and cold air discharge, it is preferable that the heat treatment to prevent cold air loss. At this time, the chamber piping 114 is formed to pass through the chamber frame 112 and the heat insulating material 113 to the internal test space of the constant temperature chamber 110, the cold air of the cooling unit 300 by the constant temperature chamber It is fed or recovered to the internal test space of (110).

Since cold air is circulated in association with the cooling unit 300, the temperature of the cooling unit 300 is reliably extended by one of the setting temperatures (for example, -40 ° C.) selected and adjusted from a temperature of 0 to -50 ° C. The temperature of the internal test space of the constant temperature chamber 110 is maintained.

In the internal test space of the constant temperature chamber 110, the vertical arrangement of each of the first test module 150 and the second test module 170, which receives the operating force required for the reciprocating motion and the rotational motion from the machine room 120, which will be described below. Component and Horizontal Placement Parts are placed.

These components are designed to operate normally in extreme conditions, such as cryogenic temperatures, to reciprocate or rotate the specimens with ice (e.g. ice liquor) inside the constant temperature chamber 110 while operating at a temperature of -40 ° C. Play a role.

The constant temperature chamber 110 is installed at both sides of the chamber door 111, which can be opened and closed by a lock lever method, and the temperature can be maintained by rubber packing at both sides of the chamber frame 112 (eg, a hinge method), respectively. It is desirable to have. This opening and closing configuration of the chamber door 111 can facilitate the internal cleaning of the constant temperature chamber 110, and when a pinhole test or the like is required to define the deterioration time of ice during wear and friction testing, the chamber Opening the door 111 allows for easy pinhole testing.

As shown in FIG. 4, the constant temperature chamber 110 has a chamber frame 112 having an internal test space and a polyurethane insulation filled in a wall of the chamber frame 112.

The machine room 120 of the main body 100 includes a plurality of power sources (for example, first and second motors) to be used in the first test module 150 and the second test module 170 to be described below, and any one of the power sources. Reciprocating power transmission means connected to one (for example, worm reducer, first gear coupling, ball screw assembly, outer rod, load cell block, load cell block cover, etc.) and rotation connected to the other of the power sources Movement power transmission means (e.g. gearbox, shaft, second gear coupling, torque transmitter, third gear coupling, part of the spindle, external bearing block, etc.), various cables, A housing frame 121 having an installation space for installing a connector harness, a plurality of non-contact or contact sensors for checking a friction distance, and detachable by using a bolt mounting method on both sides of the housing frame 121, and having a handle. One door panel 122 Have

The ice mounting chamber 130 of the main body 100 includes a box frame 131 having a mounting work space and a box frame 131 on both sides of the box frame 131 so that the ice column can be inserted into a cylinder or liner type ice holder. It has a work window 132 formed through.

The control panel 140 of the main body 100 controls an operation display device for controlling the first test module 150 and the second test module 170 and displaying the operation results so that the control panel 140 can be distinguished for each test module from the front of the casing of the control panel 140. I am placing it.

For example, the operation display device may include a plurality of control buttons, a display device for numerical display (eg, 7-segment or LCD display) required for testing, an operation status display lamp, an emergency stop display lamp or alarm, a power on / off switch, an operation switch, a timer. , A timer using a timer, a thermometer, and the like.

The control panel 140 has a test logic circuit (eg, a PLC) electrically coupled with a load cell, a load cell block, a torque transmitter, and other general sensors or heaters, and the hydraulic unit 200 and the cooling unit 300. The operation control circuit can be configured to work with Here, various load cells, load cell blocks, torque transmitters, etc. are installed in the first test module 150 or the second test module 170 and correspond to a device for measuring physical quantities required for wear and friction tests or data acquired during the test. .

In addition, the test logic circuit of the control panel 140 includes load or torque measurement values when the ice is crushed with respect to the contact between the ice and other materials, temperature, surface roughness, ice contact area, sliding speed, and shape information of the ice column. It is programmed to calculate the frictional force, static friction coefficient or motion friction coefficient using data related to friction test. That is, the control panel 140 may set values such as load, feed rate, test time, rotation speed, torque, etc. for the experiment, and enable data acquisition and conversion in real time by a computer program manufactured by the controller. Consists of.

In particular, the control panel 140 does not implement the set temperature in the constant temperature chamber 110, or abnormal operation of the apparatus in the constant temperature chamber 110 due to a power failure or an abnormality in the unit or the device during the test in the ice wear tester of the present invention that handles ice. In case of occurrence, emergency stop function is provided for safety.

That is, the control panel 140 compares and checks the data acquired during the test with the value set in the control panel 140 and exceeds the predetermined allowable ratio, that is, when it is determined to be different from the set test atmosphere, at least the first, It is programmed to suddenly stop the second actuator and the first and second motors, and to display the emergency stop state through an emergency stop display lamp or an alarm.

Through this, the control panel 140 determines by using an allowable ratio (eg, 10%) in which the value of the glacier rapidly decreases as ice melts, such as ice sheets due to a power failure or an abnormal device, and performs a sudden stop, a warning, etc. Secure stability

This sudden stop function can result in an efficient test. If the sudden stop time is made at the 20th time of 100 hours of the total test time, after eliminating the cause of the sudden stop, it is possible to test only the remaining 80 hours so that the equipment can be efficiently operated.

In addition, the control panel 140 is configured to control the sliding speed or the friction distance according to the test conditions corresponding to the reciprocating motion or the rotational speed of each test piece.

In addition, the control panel 140 controls the forward, stop or reverse operation of the operating rods of the first and second actuators 151 and 171 to finely control the contact pressure to be in contact with the glacial ice or ice. It is connected to the hydraulic control unit of (200).

The first test module 150 of the main body 100 is installed over the constant temperature chamber 110, the machine room 120, and the ice mounting chamber 130 based on the left region of the main body 100.

The first test module 150 is a cylinder-type first actuator 151 supplied with hydraulic pressure from the hydraulic unit 200, and applies the glacier weight to the first test piece along the vertical direction of the first test piece. 120) the inner power source and the power transmission means for the reciprocating motion serves to reciprocate the first test piece in the horizontal direction of the first test piece.

On the other hand, the second test module 170 is installed over the constant temperature chamber 110, the machine room 120, the ice mounting chamber 130, based on the right region of the main body 100.

The second test module 170 is a cylinder-type second actuator 171 supplied with hydraulic pressure from the hydraulic unit 200, and applies the glacier weight to the second test piece along the vertical direction of the second test piece. 120) A power source for the inner right and the power transmission means for the rotary motion serves to rotate in the circumferential direction based on the axis of the second test piece.

2 to 7 are shown in the form of mechanical design drawings in order to facilitate the understanding of the layout and coupling relationship of the internal components.

2, the main body 100 is coupled to the hydraulic unit 200 through the hydraulic line to receive or recover the hydraulic pressure.

In addition, the main body 100 may be connected to the cooling unit 300 through a plurality of ducts 310 so as to supply and recover the cold air of the circulation method that may be maintained at a temperature of −40 ° C. for a long time to the constant temperature chamber 110. do.

The cooling unit 300 has a configuration similar to a cooling device (for example, chiller, etc.) for supplying and recovering cold air generated in the cooling chamber formed therein, and separate cooling that is interlocked with the control panel 140 or self-operating. A control unit is further provided.

Here, the cooling control unit is configured to automatically adjust the temperature control by a plurality of temperature sensing sensors and preset data installed in the interior of the constant temperature chamber 110 or the inside of the cooling chamber to maximize the cold air supply quality and work efficiency. It is supposed to be.

Meanwhile, the first and second actuators 151 and 171 of each of the first and second test modules 150 and 170 perform bidirectional hydraulic supply and recovery, and thus, it is preferable to control forward, stop and backward.

Thus, although the first and second actuators 151 and 171 are designed in the form of hydraulic cylinders, any automated reciprocating device (e.g., ball screw type, shaft motor type, crank and connecting) that can generate predesigned glaciers Rod method, rack pinion method, pulley belt method, etc.) can be applied or replaced in accordance with the present invention, of course.

The first and second test modules 150 and 170 respectively include first and second actuators 151 and 171 installed upright in parallel to be spaced apart from each other on the ice mounting chamber 130 as vertical arrangement components.

The first and second test modules 150 and 170 may include load cell blocks 152 and 172 for measuring ice loads installed between the ice compartment 130 and the cylinder housings of the first and second actuators 151 and 171, respectively. Including the heater-mounted ice mounting packing (153, 173) is fitted to the operating rod of the first and second actuators (151, 171).

In addition, the first and second test modules 150 and 170 may include pressure heads 154 and 174 having a piston head shape installed at the end of the operating rods of the first and second actuators 151 and 171, and the pressure head 154. Ice mounter installed so as to extend toward the constant temperature chamber 110 by hanging the hollow casing member-shaped liner for the sliding insertion operation of the 174 and a mounting casing with a heater built around the ice mounting chamber 130. 155, 175).

In addition, among the components related to the first and second test modules 150 and 170, the components in the internal test space of the constant temperature chamber 110 may include the lower support 156 for the linear guide and the lower support 176 for the internal bearing block. ), And a plurality of load cells 157 and 177.

As shown in FIG. 3, the first test module 150 is installed in the left region of the main body 100 on the basis of the first center line CL1 extending along the longitudinal direction of the drawing, and the second test module ( 170 is arranged in the right region of the main body 100 with respect to the second center line CL2 parallel to the first center line CL1.

In addition, the first and second actuators 151 and 171 of the first and second test modules 150 and 170 are disposed below and above the third center line CL3 extending along the horizontal direction of the drawing. It is.

In this way, the installation position is different, the first and second test modules 150 and 170 can share a constant temperature chamber 110 while avoiding mechanical interference between each other.

Referring to FIG. 4, the first test module 150 includes a first actuator 151, a load cell block 152 for glacier measurement, a heater built-in ice mounting packing 153, a pressurized head 154, and a vertical arrangement component. Including the ice packer 155, the vertical length of the ice packer 155 is designed in consideration of the height of the reciprocating motion.

The ice column 40, which is a relative agent to the reciprocating motion of the first test piece 50, is inserted into the liner of the ice maker 155 of the first test module 150 through the work window 132 of the ice loading chamber 130. .

The first test module 150 is a horizontal arrangement component, which is disposed in the vertical lower portion of the ice maker 155 to seat the first test piece 50 to be rubbed or worn on the ice sheet 40 of the constant temperature chamber 110. It has a test piece mounting base 158 disposed therein.

In addition, the first test module 150 is capable of sliding operation at the bottom of the test piece clamping portion 159 and the test piece mounting base 158 to temporarily fix the first test piece 50 based on the test piece mounting base 158. It includes a linear guide 160 installed.

In addition, the first test module 150 includes a plurality of linear guide lower supports 156 for supporting the linear guide 160, load cells 157 respectively installed under the lower support 156, and the test piece mounting. An inner rod 161 (inner rod) coupled to one end of the base 158 is included.

In addition, the first test module 150 includes a heater-embedded bushing 162 installed at a boundary point at which the internal rod 161 exits the constant temperature chamber 110, and the internal rod 161 exiting the constant temperature chamber 110. A linear bush 165 corresponding to the outer rod 164 axially coupled with the load cell block cover 163 interposed at the other end of the rod and a ball screw nut block connected to the end of the outer rod 164. ).

In addition, the first test module 150 is coupled to the linear bush 165, the ball screw shaft 166 that is rotationally supported by a pair of bearing holder, and the ball screw guide connected in parallel to the linear bush (165) 167, a worm reducer 168 axially coupled via a gear coupling to transmit rotational force to the ball screw shaft 166, and a first motor 169 mounted to the worm reducer 168.

Referring to FIG. 5, the second test module 170 is also a vertical arrangement component, the second actuator 171, the load cell block 172 for glacier weight measurement, the heater built-in ice mounting packing 173, and the pressure head 174. Including the ice maker 175, it is preferable that the vertical length of the ice maker 175 is designed in consideration of the height of the rotation movement.

The ice column 41, which is a relative agent to the rotational movement of the second test piece 70, is inserted into the liner of the ice maker 175 of the second test module 170 through the work window 132 of the ice loading chamber 130. .

The second test module 170 is a horizontal arrangement component for the second test piece 70 which is disposed on the vertical lower portion of the ice maker 175 to friction or wear on the ice column 41, and has a structure such as a rotatable headstock. .

For example, the second test module 170 may include a ring clamping part 178 for temporarily mounting the second test piece 70, a spindle 179 having the ring clamping part 178 formed at one end thereof, and the spindle. 179 includes an internal bearing block 180 that smoothly supports rotation in cryogenic environments.

In addition, the second test module 170 includes a plurality of lower support 176 for the inner bearing block for supporting the inner bearing block 180, a load cell 177 installed under the lower support 176, and the The spindle 179 includes a heater-embedded bushing 181 installed at a boundary point exiting the thermostatic chamber 110.

In addition, the second test module 170 has an outer bearing block 182 for rotationally supporting the other end of the spindle 179 exiting the thermostatic chamber 110 and a second gear at the other end of the spindle 179. Rotating shaft member 184 coupled to one end by the coupling (183).

In addition, the second test module 170 is coupled to the torque transmitter 185 and the third gear coupling 186 at the other end of the rotary shaft member 183 and the torque transmitter 185 installed to measure the torque value in the rotary shaft member 183. And a second motor 188 mounted on the gear box 187 and coupled to provide a rotational force to the output shaft.

Hereinafter, the operation relationship between the ice wear tester of the present invention will be described with reference to FIGS. 6 and 7.

As shown in FIG. 6, the experimenter inserted and mounted ice, such as ice sheets, into the ice holder of the first test module, and operated the first actuator to press the ice sheets 40 to press the ice sheets 40 (fn1). Is applied to the first test piece (50).

In this case, the first test piece 50 is seated on the test piece mounting base 158, and then temporarily fixed by the test piece clamping part 159.

Thereafter, the first test piece 50 is similar to the operation method of the reciprocating shuttle bed, including the test piece mounting base 158, the linear guide 160, the inner rod 161, and the aforementioned power transmission means for reciprocating motion. While performing the reciprocating motion (m1) implemented by one motor is applied to the glacial load (fn1).

The measured value generated during the ice wear or friction test according to this reciprocating motion m1 is detected through various load cells and load cell blocks, and is eventually displayed as a friction force or coefficient of friction through the control panel.

At the same time, as shown in FIG. 7, the experimenter inserts and inserts ice, such as ice sheets, into the ice holder of the second test module, and operates the second actuator to press the ice sheets 41. (fn2) is applied to the second test piece 70.

The glacial ice (fn1, fn2) is preferably 250kgf ~ 1000kgf as the vertical ice load, when converted to the surface pressure, 5kgf / ㎠ ~ 20kgf / ㎠.

At this time, the second test piece 70 is temporarily fixed to the mounting main surface 178d by a ring nut 178a, a spring washer 178b, and a pressure ring disk 178c corresponding to the ring-type clamping portion 178.

Then, the second test piece 70 is similar to the operation method of the main shaft that can be rotated precisely, including the spindle 179, the rotational motion (m2) implemented by the aforementioned power transmission means for rotational motion and the second motor. While running, it receives a snowfall (fn2).

The measured value generated during the ice wear or friction test according to the rotational motion m2 is detected at the same time as the measured value according to the reciprocating motion m1 through various load cells and torque transmitters. It is expressed as frictional force or coefficient of friction.

1 is a perspective view of an ice wear tester according to an embodiment of the present invention.

2 is a front view of the embodiment shown in FIG. 1.

3 is a plan view of the main body shown in FIG.

4 is a left side view of the main body shown in FIG. 3.

5 is a right side view of the main body shown in FIG. 3.

FIG. 6 is an enlarged side view illustrating important parts of the first test module illustrated in FIG. 4.

FIG. 7 is an enlarged side view illustrating important parts of the second test module illustrated in FIG. 5.

               Description of the main parts of the drawing

50: first test piece 70: second test piece

100: main body 110: constant temperature chamber

120: machine room 130: ice loading room

140: control panel 150: the first test module

170: second test module 200: hydraulic unit

300: cooling unit 310: duct

Claims (10)

In the ice wear tester for performing the friction and abrasion test of the test piece with the counterpart of ice for a relatively long time, A main body arranged in parallel with the first test module and the second test module for realizing reciprocating motion and rotational motion for each of the test pieces while simultaneously applying glacier to the ice; A hydraulic unit connected to supply hydraulic pressure to the first test module and the second test module; And a cooling unit connected to supply cold air to the main body in a circulating manner. The first test module and the second test module, First and second actuators installed in parallel to be spaced apart from each other in an ice compartment; Load cell blocks for glacier weight measurement respectively installed between the ice compartment and the cylinder housings of the first and second actuators; A heater built-in ice mounting packing fitted to the operation rods of the first and second actuators; A pressure head installed at an end of an operation rod of the first and second actuators; An ice mounter installed to extend toward the constant temperature chamber by hanging a hollow tube member-shaped liner for sliding operation of the pressure head and a mounting casing incorporating a heater around the bottom of the ice loading chamber; Ice wear tester comprising a. The method of claim 1, The main body, An ice abrasion tester, comprising a level adjustment and a stopper combined caster provided in a plurality of locations on the base frame of the main body. The method according to claim 1 or 2, The main body, A constant temperature chamber disposed at the front upper portion of the base frame; A machine room disposed above the rear of the base frame; An ice mounting chamber disposed above the thermostatic chamber; A control panel erected at the front corner of the ice compartment; Ice wear tester further comprises. The method of claim 3, The constant temperature chamber, A chamber frame having an internal test space; Insulation material filled in the wall of the chamber frame; A chamber pipe connected to the duct of the cooling unit and penetrating the chamber frame and the heat insulating material to supply and recover the cold air to the internal test space; A chamber door installed to open and close at both sides of the chamber frame to selectively open and close the internal test space with the outside; Ice wear tester comprising a. The method of claim 3, The machine room, A plurality of power sources for use in the first test module and the second test module; Reciprocating power transmission means connected to any one of the power sources; Power transmission means for rotational movement connected to the other one of the power sources; A housing frame in which the power source and the power transmission means are installed; A plurality of door panels detachably coupled to both sides of the housing frame; Ice wear tester comprising a. The method of claim 3, The control panel, And an operation display device for controlling the first test module and the second test module and displaying operation results so as to be distinguished for each test module from the front of the casing of the control panel. The method of claim 3, The control panel, When the data acquired during the test is compared with the check value set in the control panel and the predetermined allowable ratio is exceeded, at least the first and second actuators and the first and second motors are suddenly stopped and the emergency stop state is stopped. Ice wear tester, characterized in that configured to display through the emergency stop indicator lamp or alarm. delete The method of claim 1, The first test module, A test piece mounting base disposed inside the constant temperature chamber to seat the first test piece to be disposed in the vertical lower portion of the ice maker; A test piece clamping part for temporarily fixing a first test piece based on the test piece mounting base; A linear guide slidably installed at a bottom of the test piece mounting base; A lower support for the linear guide supporting the linear guide; A plurality of load cells installed under the lower support; An inner rod coupling one end to the test piece mounting base; A heater-embedded bushing installed at a boundary point at which the internal rod exits the constant temperature chamber; An outer rod axially coupled with a load cell block cover at the other end of the inner rod exiting the constant temperature chamber; A linear bush connected to an end of the external rod; A ball screw shaft coupled to the linear bush and rotatably supported by a pair of bearing holders; A ball screw guide connected to the linear bush in parallel; A worm reducer axially coupled through a gear coupling to transmit rotational force to the ball screw shaft; A first motor mounted on the worm reduction gear; Ice wear tester comprising a. The method of claim 1, The second test module, A ring-type clamping part for temporarily mounting a second test piece to be disposed in a vertical lower portion of the ice maker; A spindle formed at one end of the ring-type clamping portion; An internal bearing block for rotationally supporting the spindle; A lower support for a plurality of inner bearing blocks for supporting the inner bearing blocks; Load cells respectively installed under the lower support; A heater-embedded bushing installed at a boundary point at which the spindle exits the constant temperature chamber; An outer bearing block for rotationally supporting the other end of the spindle that has exited the thermostatic chamber; A rotating shaft member which axially couples one end with the second gear coupling at the other end of the spindle; A torque transmitter installed to measure the torque value at the rotating shaft member; A gear box having an output shaft axially coupled to the third gear coupling at the other end of the rotary shaft member; A second motor mounted on the gear box and coupled to provide a rotational force to the output shaft; Ice wear tester comprising a.

Images