KR102040912B1 - Pipeline connection structure for supplying oil to bearings for high voltage motors - Google Patents

Abstract

A piping line connection structure for supplying oil to a bearing for a high voltage motor is disclosed. Pipe line connection structure for supplying oil to the bearing for the high voltage motor according to the present invention, an oil supply line connected to the motor and supplying oil to the bearing, and an oil return line connected to the motor to recover the oil supplied to the bearing And a regulator valve mounted on the oil supply line to maintain a constant pressure of the oil delivered to the bearing, a pressure gauge connected to the oil supply line to display the pressure of the oil delivered to the bearing, an oil supply line and a pressure gauge And a self-closing oil leakage automatic shutoff valve unit connected to and connected to the pressure gauge to open and close the flow of oil to the pressure gauge and to prevent oil leakage from the broken pressure gauge when the pressure gauge breaks.

Description

Pipeline connection structure for supplying oil to bearings for high voltage motors}

The present invention relates to a pipe line connection structure for supplying oil to a bearing for a high voltage motor, and more particularly, to a pipe line for supplying lubricating oil to a bearing for supporting a rotor shaft of an industrial induction motor.

In general, an induction motor is a kind of alternating current (AC) motor belonging to a rotating magnetic field type, the driving principle of which is obtained by the interaction of the rotating magnetic field generated in the stator and the induction magnetic field generated in the rotor portion. Single phase, three-phase induction conductors and three-phase winding type induction motors are used for such induction motors.

Induction motors are one of the easiest to use among AC motors, and are widely used in homes as well as industrial sites.

The induction motor includes a rotor, a stator surrounding the rotor, a bearing for supporting the rotor, and a piping line for supplying oil to the bearing.

The rotor includes a cylindrical rotor shaft, a rotor core coupled to the rotor shaft, and a magnet formed along the outer circumferential surface of the rotor core.

The stator includes a stator core disposed to surround the rotor core at a predetermined distance from the magnet, an armature winding wound around the stator core, and a lead wire for supplying power to the armature winding.

The bearing is connected to the rotor shaft to support the rotor shaft. Piping lines supply lubricating oil to the bearings to reduce bearing friction and wear and to cool the bearings.

This pipe line is provided with a pressure gauge for measuring the supply pressure of the oil supplied to the bearing. Pressure gauges are frequently replaced because they are prone to breakage during use.

However, in order to replace the broken pressure gauge in the prior art, there was an inconvenience of stopping the oil supply to the bearing, and there was a problem in that the induction motor could not be used as the oil supply was stopped during the replacement work time of the broken pressure gauge.

In addition, when the oil leaks through the broken pressure gauge and the operator does not recognize the leakage of the oil quickly, there is a problem that the bearing and the induction motor may be damaged because sufficient oil is not supplied to the bearing.

Republic of Korea Patent Publication No. 10-2015-0020753 (2015.02.27.)

Therefore, the problem to be solved by the present invention is to replace the broken pressure gauge without stopping the oil supply to the bearing, and the oil for the high voltage motor bearing that can automatically block the leakage of oil from the broken pressure gauge It is to provide a pipe line connection structure for supplying.

According to an aspect of the present invention, in a pipe line connection structure for supplying oil to a bearing for a high voltage motor supplying oil to a bearing for supporting a rotor shaft of the motor, it is connected to the motor, the bearing An oil supply line for supplying the oil; An oil recovery line connected to the motor and recovering the oil supplied to the bearing; A regulator valve mounted on the oil supply line and configured to maintain a constant pressure of the oil delivered to the bearing; A pressure gauge connected to the oil supply line and displaying a pressure of the oil delivered to the bearing; And opening and closing the flow of the oil, which is connected to the oil supply line and the pressure gauge, to open and close the flow of the oil that is moved to the pressure gauge, and to block the leakage of the oil from the broken pressure gauge when the pressure gauge is broken. A pipe line connection structure for supplying oil to a bearing for a high voltage motor including a dual oil leakage automatic shutoff valve unit may be provided.

The opening and closing combined oil leakage automatic shutoff valve unit, the valve body portion is provided with an oil inflow path for the oil is introduced, an oil outflow path for the oil outflow, and a communication hole for communicating the oil inflow path and the oil outflow path ; An opening and closing part connected to the valve body part to open and close the communication hole; And an oil shutoff part coupled to the valve body part and connected to the oil recovery line and closing the communication hole according to the pressure of the oil passing through the oil recovery line.

The opening and closing portion, the screw thread is formed on the outer peripheral surface is engaged with the opening and closing screw hole provided in the valve body portion, the opening and closing drive shaft for moving in the direction approaching and spaced apart from the communication hole by rotation; An opening and closing seat portion coupled to one end portion of the opening and closing drive shaft part and disposed in the oil inflow path to open and close the communication hole according to the movement of the opening and closing drive shaft part; And coupled to the other end region of the drive shaft for opening and closing, it may include a rotary handle portion disposed outside the valve body portion.

The oil blocking unit may be coupled to the valve body unit, and a blocking chamber unit having a hollow inside thereof; A sliding head part connected to the inner wall of the blocking chamber part so as to be slidably movable, wherein one side wall forms a pressure space together with an inner wall of the blocking chamber part; A blocking shaft part connected to the sliding head part and penetrating a chamber through hole provided in the blocking chamber part and a blocking through hole provided in the valve body part to communicate with the chamber through hole; A blocking seat portion coupled to the distal end of the blocking shaft portion and disposed in the oil outflow path to close the communication hole according to the movement of the blocking shaft portion; A pressure pipe connected to the oil return line and the shutoff chamber and configured to communicate an interior of the oil return line with the pressure space; A pressing elastic body disposed inside the blocking chamber part and supported by the blocking chamber part and connected to the sliding head part to press the sliding head part in the communication hole direction; And a stopper part supported by the blocking chamber part and connected to the sliding head part to limit movement of the sliding head part.

The sliding head portion, the head body disposed inside the blocking chamber portion; And a protruding bar coupled to the head body and passing through a through slot hole formed in the blocking chamber part.

The stopper part may include a stopper housing part coupled to an outer wall of the blocking chamber part; A stopper moving block part supported by the stopper housing part and slidably connected to the stopper housing part and in contact with the protruding bar; A stopper guide part coupled to the stopper housing part and disposed in the stopper housing part and connected to the stopper moving block part to guide movement of the stopper moving block part; And a stopper elastic body disposed inside the stopper housing part and supported by an inner wall of the stopper housing part and connected to the stopper moving block to elastically press the stopper moving block. can do.

The stopping moving block part may include: a block body part having a block through hole through which the stopping guide part passes; And a protruding head portion protruding from the block body portion.

The distal end of the protruding head portion may be provided in an inclined shape in which the length of the protruding head portion from the upper portion to the lower portion is longer.

The oil blocking unit may further include a pressing force control unit connected to the pressing elastic body to adjust the pressing force of the pressing elastic body.

The pressing force adjusting part may include an adjusting rotary screw part which is formed on an outer circumferential surface thereof and is engaged with the pressing force adjusting screw hole formed in the blocking chamber part and moved in a direction approaching and spaced apart from the sliding head part by rotation. have.

Embodiments of the present invention, by opening and closing the flow of oil moved to the pressure gauge and by opening and closing combined oil leakage automatic shut-off valve unit to block the leakage of oil in the broken pressure gauge in the event of breakage of the bearing, The broken pressure gauge can be replaced without stopping the oil supply to the furnace, and oil leaks from the broken pressure gauge can be automatically shut off.

1 is a view showing a pipe line connection structure for supplying oil to a bearing for a high voltage motor according to an embodiment of the present invention.
Figure 2 is a view showing the internal structure of the automatic shut-off oil leakage automatic shut off valve unit of Figure 1;
FIG. 3 is a view illustrating an oil cutoff unit of FIG.
4 is a view illustrating a state in which the protruding bar of FIG. 3 is restricted in movement by the stopper part.
5 is a cross-sectional view taken along line AA of FIG. 4.
6 is a view illustrating a state in which the oil blocking part of FIG. 2 closes the communication hole.

As the invention allows for various changes and numerous embodiments, particular embodiments will be illustrated in the drawings and described in detail in the written description. Effects and features of the present invention, and methods of achieving them will be apparent with reference to the embodiments described below in detail in conjunction with the drawings. However, the present invention is not limited to the embodiments disclosed below, but may be embodied in various forms and should be understood to include all changes, equivalents, and substitutes included in the spirit and scope of the present invention.

Prior to the description, the terms described in the detailed description will be described. In the following embodiments, the terms first, second, etc. are used for the purpose of distinguishing one component from other components rather than a restrictive meaning. Therefore, of course, the first component mentioned below may be a second component within the technical spirit of the present invention. Also, the singular forms “a”, “an” and “the” include plural forms unless the context clearly indicates otherwise. Also, the terms 'comprise' or 'have', etc., mean that there is a feature, number, step, operation, component, part, or combination thereof described in the specification, and one or more other features or components. Does not preclude the possibility of being added.

In addition, in the drawings, components may be exaggerated or reduced in size for convenience of description. For example, the size and thickness of each component shown in the drawings are arbitrarily shown for convenience of description, and thus the present invention is not necessarily limited to the illustrated.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the description with reference to the accompanying drawings, the same or corresponding components are designated by the same reference numerals and redundant description thereof will be omitted.

1 is a view illustrating a pipe line connection structure for supplying oil to a bearing for a high voltage motor according to an embodiment of the present invention, and FIG. 2 is a diagram illustrating an internal structure of an oil shutoff automatic shutoff valve unit of FIG. 1. 3 is a view illustrating the oil cutoff part of FIG. 2, and FIG. 4 is a view illustrating a state in which the protruding bar of FIG. 3 is restricted by the stopper part, and FIG. 5 is a line AA of FIG. 4. 6 is a view illustrating a state in which the oil cutoff part of FIG. 2 closes the communication hole.

The pipe line connection structure for supplying oil to the bearing for the high voltage motor according to the present embodiment supplies oil to a bearing (not shown) that supports a rotor shaft (not shown) of the induction motor. The induction motor is provided with a bearing housing BH in which a bearing (not shown) is disposed.

Pipe line connection structure for supplying oil to the bearing for the high voltage motor according to the present embodiment, as shown in Figure 1 to 6, the oil supply line is connected to the motor and supplying oil to the bearing (not shown) ( 110, the oil recovery line 120 connected to the motor to recover the oil supplied to the bearing (not shown), and the pressure of the oil mounted on the oil supply line 110 and delivered to the bearing (not shown) constant A regulator valve (RV) for maintaining the pressure, a pressure gauge (PG) connected to the oil supply line (110) and indicating a pressure of oil delivered to a bearing (not shown), and an oil return line (120). An oil pump connected to and storing oil, an oil pump connected to an oil storage tank (not shown) and an oil supply line 110 to flow oil stored in the oil storage tank into the oil supply line 110. (Not shown) and oil Leakage of oil from broken pressure gauge (PG) in case of breakage of pressure gauge (PG), opening and closing the flow of oil to pressure line (PG) and connected to pressure line (110) and pressure gauge (PG) It includes an opening and closing combined oil leakage automatic shutoff valve unit 130 to block the.

The oil supply line 110 is connected to the bearing housing BH. The oil supply line 110 supplies lubricating oil to a bearing (not shown).

The oil return line 120 is connected to the bearing housing BH. The oil recovery line 120 is supplied to the bearing (not shown) to recover the oil lubricated in the bearing (not shown) and transfer to the oil storage tank (not shown).

The regulator valve RV is mounted to the oil supply line 110. This regulator valve RV keeps the pressure of the oil delivered to the bearing (not shown) constant.

The pressure gauge PG is connected to the oil supply line 110. This pressure gauge (PG) measures and displays the pressure of the oil delivered to the bearing (not shown). In the present embodiment, the pressure gauge PG is a Bourdon tube pressure gauge PG which requires no power supply.

Open / closing combined oil leakage automatic shutoff valve unit 130 is connected to the oil supply line 110 and the pressure gauge (PG). The open / close combined oil leakage automatic shutoff valve unit 130 is disposed between the oil supply line 110 and the pressure gauge PG to transfer oil of the oil supply line 110 to the pressure gauge PG.

In addition, the open / close oil leakage automatic shut-off valve unit 130 opens and closes the flow of oil moved to the pressure gauge PG, and the oil in the broken pressure gauge PG when the pressure gauge PG breaks. Automatically shut off leaks.

Opening and closing combined oil leakage automatic shutoff valve unit 130 according to the present embodiment, as shown in detail in Figures 2 to 6, the oil inflow path 141 through which the oil is introduced and the oil outflow path 142 through which the oil flows out ) Is connected to the valve body portion 140 and the valve body portion 140 is provided with a communication hole 144 for communicating the oil inflow path 141 and the oil outflow path 142, opening and closing the communication hole 144 Opening and closing portion 150 and the valve body portion 140 is coupled to the oil return line 120 and the oil shutoff portion for closing the communication hole 144 in accordance with the pressure of the oil passing through the oil return line 120 160.

As shown in FIG. 2, in the valve body 140, an oil inflow path 141 through which oil is introduced from the oil supply line 110, and an oil outflow path through which oil flows out through the pressure gauge PG. 142 and a partition wall 143 having a communication hole 144 for communicating the oil inflow path 141 and the oil outflow path 142 is provided.

In addition, one end of the valve body 140 is provided with a supply line coupling portion 147 coupled to the oil supply line 110, the other end of the valve body portion 140 is coupled to the pressure gauge (PG) Gauge coupling portion 148 is provided.

In addition, the valve body 140 is provided with an opening and closing screw hole 145 to which the opening and closing driving shaft 151 of the opening and closing portion 150 is to be fitted. Threads are formed on the inner circumferential surface of the opening and closing screw hole 145. In addition, the valve body 140 is provided with a blocking through-hole 146 through which the blocking shaft 163 of the oil blocking unit 160 to be described later passes.

In addition, the valve body portion 140, the O-ring (R) for sealing the oil in the portion connected to the opening and closing portion 150 and the valve body portion 140 and the portion connected to the oil shut-off portion 160 and the valve body portion 140 (R) ) Is provided.

The opening and closing part 150 is connected to the valve body 140 to open and close the communication hole 144. 2 and 6, the opening and closing portion 150, the thread is formed on the outer circumferential surface is engaged with the opening and closing screw hole 145 provided in the valve body portion 140 and the communication hole 144 by rotation Opening and closing drive shaft 151 which is moved in a direction approaching and spaced with respect to, and coupled to one end region of the opening and closing drive shaft 151, disposed in the oil inflow path 141 for the opening and closing drive shaft 151 Opening and closing seat portion 153 for opening and closing the communication hole 144 in accordance with the movement of the rotation handle portion coupled to the other end region of the opening and closing drive shaft portion 151 and disposed outside the valve body portion (140) 155).

The opening and closing drive shaft 151 is provided in a circular rod shape, and a thread is formed on the outer circumferential surface of the opening and closing drive shaft. The opening and closing drive shaft 151 is engaged with the opening and closing screw hole 145 of the valve body 140. The opening and closing drive shaft part 151 according to the present embodiment is moved in a direction approaching and spaced apart from the communication hole 144 by rotation.

The opening and closing seat portion 153 is coupled to one side end region of the opening and closing drive shaft portion 151. The opening and closing seat 153 is disposed in the oil inflow path 141 is moved in the direction approaching and spaced apart from the communication hole 144 according to the movement of the opening and closing drive shaft 151 to open the communication hole 144 and To close. The outer wall surface of the opening and closing seat 153 is provided with a sealing member (not shown) for shielding the communication hole 144. The sealing member is made of a rubber-like material, the opening and closing seat 153 is in close contact with the partition 143 when the communication hole 144 closes the oil outflow from the oil inlet 141 to the communication hole 144. prevent.

The rotary knob 155 is coupled to the other end region of the driving shaft 151 for opening and closing. The rotary knob 155 is disposed outside the valve body 140. The opening and closing drive shaft 151 is rotated by the rotation knob 155 of the present embodiment by rotation, and the opening and closing seat portion coupled to the opening and closing drive shaft 151 by the rotation of the opening and closing drive shaft 151 ( 153 is moved in a direction approaching and away from the communication hole 144, the communication hole 144 is opened and closed.

As such, the pipe line connection structure for supplying oil to the bearing for the high voltage motor according to the present embodiment includes an opening and closing part 150 for opening and closing the communication hole 144 through which oil flowing through the pressure gauge PG passes. When replacing the pressure gauge (PG), it is possible to stop only the flow of oil flowing to the pressure gauge (PG) and replace the pressure gauge (PG) without having to stop the entire flow of oil supplied to the bearing (not shown) Therefore, there is an advantage that the induction motor can be operated even during the replacement of the pressure gauge (PG).

On the other hand, the oil block 160 is coupled to the valve body 140 and is connected to the oil return line 120. The oil blocking unit 160 closes the communication hole 144 according to the pressure of the oil passing through the oil recovery line 120.

That is, the oil blocking unit 160 according to the present embodiment automatically communicates when the oil leaks from the pressure gauge PG in a large amount due to breakage of the pressure gauge PG, thereby lowering the pressure of the oil recovery line 120. Close 144 to shut off oil flow to the pressure gauge PG.

In order to automatically shut off the oil flow to the pressure gauge PG, the oil cutout 160 according to the present embodiment is coupled to the valve body 140 and has an interior as shown in detail in FIGS. 2 to 6. The blocking chamber part 161 which is provided to be hollow and the sliding chamber are slidably connected to the inner wall of the blocking chamber part 161 and one outer wall forms a pressure space 161a together with the inner wall of the blocking chamber part 161. It is connected to the sliding head portion 162, the sliding head portion 162 and provided in the chamber through hole (161b) and the valve body portion 140 provided in the blocking chamber portion 161 communicates with the chamber through hole (161b). The blocking shaft portion 163 penetrating the blocking through-hole 146, which is coupled to the distal end of the blocking shaft portion 163 and disposed in the oil outflow path 142 to move the blocking shaft portion 163 Block section 164 for closing the communication hole 144, the oil recovery line 120 and for blocking Pressure connecting connection pipe 165 for communicating with the chamber portion 161 and communicating the interior of the oil recovery line 120 and the pressure space 161a, and the interior of the blocking chamber portion 161, the blocking chamber The pressing elastic body 166 supported by the unit 161 and connected to the sliding head unit 162 to press the sliding head unit 162 in the direction of the communication hole 144, and connected to the pressing elastic body 166 and pressurized A pressing force adjusting part 167 for adjusting the pressing force of the elastic body 166 and a stopper part supported by the blocking chamber part 161 and connected to the sliding head part 162 to limit the movement of the sliding head part 162. And 170.

The blocking chamber part 161 is coupled to the valve body part 140. The blocking chamber part 161 is provided in a rectangular box shape with an inside hollow. In the lower wall of the blocking chamber part 161 of the present embodiment, a chamber through hole 161b communicating with the blocking through hole 146 formed in the valve body part 140 and through which the blocking shaft part 163 penetrates is provided. Prepared.

Further, through slot holes 161c through which the protruding bar 162b to be described later penetrate are provided on both side walls of the blocking chamber part 161. The through slot hole 161c has a long long hole shape.

Further, the upper wall of the blocking chamber portion 161 is provided with a pressing force adjusting screw hole 161d to which the adjusting rotating screw portion 167a, which will be described later, of the pressing force adjusting portion 167 is engaged. A screw thread is provided on the inner circumferential surface of the pressing force adjusting screw hole 161d.

The sliding head part 162 is slidably connected to the inner wall of the blocking chamber part 161. One outer wall of the sliding head portion 162 forms a pressure space 161a together with an inner wall of the blocking chamber portion 161. The size of the pressure space 161a changes as the sliding head portion 162 moves, as shown in FIGS. 2 and 6.

2 and 6, the sliding head 162 according to the present embodiment includes a head body 162a disposed in the blocking chamber 161 and a head body 162a. It is coupled and includes a protruding bar 162b penetrating the through slot hole 161c of the blocking chamber portion 161. The protruding bars 162b have a circular rod shape and are provided in pairs and are coupled to both sidewalls of the head body 162a, respectively.

The blocking shaft portion 163 is connected to the sliding head portion 162. The blocking shaft portion 163 is provided in a circular rod shape and extends through the chamber through hole 161b and the blocking through hole 146 to the oil outflow path 142. The blocking shaft part 163 according to the present embodiment is coupled to the sliding head part 162 and moved together with the sliding head part 162.

The blocking sheet part 164 is coupled to the distal end of the blocking shaft part 163. The blocking sheet part 164 is disposed in the oil outflow path 142 to close the communication hole 144 according to the movement of the blocking shaft part 163.

The outer wall surface of the blocking sheet portion 164 is provided with a sealing member (not shown) for shielding the communication hole 144. The sealing member is made of a rubber-like material, the blocking sheet portion 164 is in close contact with the partition wall 143 when closing the communication hole 144, the oil flows from the communication hole 144 to the oil outlet 142. To prevent them.

Connection pipe 165 for pressure transmission is connected to the oil return line 120 and the blocking chamber 161. The pressure transmission connection pipe 165 communicates the interior of the oil return line 120 with the pressure space 161a. Accordingly, the oil flowing through the bearing (not shown) and along the oil return line 120 flows into the pressure space 161a, so that the internal pressure of the pressure space 161a is increased in the oil return line 120. It has the same pressure as the internal pressure.

The pressurizing elastic body 166 is disposed inside the blocking chamber part 161. The pressing elastic body 166 is supported by the blocking chamber part 161 and connected to the sliding head part 162 to press the sliding head part 162 toward the communication hole 144.

In this embodiment, the coil spring is used for the elastic member 166 for the pressure. One end of the pressing elastic body 166 is coupled to the pressing force control unit 167, the other end of the pressing elastic body 166 is coupled to the sliding head portion 162 to elastically press the sliding head 162. do.

When the internal pressure of the pressure space 161a is lowered, the sliding head portion 162 is moved as shown in FIG. 6 by the elastic force of the pressing elastic body 166. As described above, the pressure space 161a communicates with the oil recovery line 120 so that the internal pressure of the pressure space 161a is equal to the internal pressure of the oil recovery line 120. Therefore, as the oil leaks from the pressure gauge PG in a large amount due to breakage of the pressure gauge PG, the amount of oil supplied to the bearing (not shown) decreases so that the pressure in the oil recovery line 120 is lowered. The internal pressure of the space 161a is also lowered, and accordingly, the sliding head 162 is moved by the pressing force of the elastic body so that the oil filled in the pressure space 161a flows out into the oil recovery line 120.

By the movement of the sliding head portion 162, the blocking sheet portion 164 is moved to the communication hole 144 to be in close contact with the partition wall 143 to close the communication hole 144, the broken pressure gauge (PG) Oil leakage at the

On the other hand, the stopper portion 170 is supported on the outer wall of the blocking chamber portion 161. The stopper portion 170 is connected to the sliding head portion 162 moved by the pressing force of the pressurizing elastic body 166, so that the sliding head portion 162 is in the original position (oil leakage occurs in the pressure gauge PG to recover the oil). Limit the movement of line 120 to the position before the pressure has dropped. In this embodiment, the stopper parts 170 are provided in pairs and are spaced apart from both outer walls of the blocking chamber part 161.

3 to 5, the stopper part 170 includes a stopper housing part 171 and a stopper housing part 171 coupled to an outer wall of the blocking chamber part 161. A stopper moving block portion 172 supported on and slidingly connected to the stopper housing portion 171 and in contact with the protruding bar 162b, and coupled to the stopper housing portion 171 and stopped. A stopping guide part 175 disposed in the housing part 171 and connected to the stopping moving block part 172 to guide the movement of the stopping moving block part 172, and for the stopping; It is disposed inside the housing part 171 and is supported on the inner wall of the stopper housing part 171 and connected to the stopping moving block part 172 to elastically press the stopping moving block part 172. A stopper elastic body 176 is included.

The stopping housing part 171 is coupled to the outer wall of the blocking chamber part 161. The stopper housing part 171 is provided in the shape of a rectangular box hollow inside. The outer wall of the stopper housing part 171 is provided with a protruding head through hole 171a through which the protruding head part 174 of the stopping moving block part 172 passes.

The stopping moving block 172 is supported by the stopping housing part 171 and slidably connected to the stopping housing part 171. This stopping moving block portion 172 is in contact with the protruding bar 162b.

As shown in detail in FIGS. 4 and 5, the stop moving block 172 according to the present embodiment includes a block body part in which a block through hole 173a through which the stopping guide part 175 penetrates is formed. 173 and a protruding head portion 174 protruding from the block main body portion 173.

The block main body 173 is provided in a rectangular block shape. In the block body portion 173, a pair of block through holes 173a through which the stopping guide portion 175 penetrates is formed.

The protruding head portion 174 protrudes from the block main body portion 173. As shown in FIG. 4, the distal end of the protruding head portion 174 is provided in an inclined shape in which the length of the protruding head portion 174 is longer from the top to the bottom of the block body portion 173.

Due to the inclined end shape of the protruding head portion 174, the protruding head portion 174 is more easily with respect to the stopper housing portion 171 by the movement of the protruding bar 162b of the sliding head portion 162. Relative movement.

That is, as described above, the protruding bar 162b moves to the stopper 170 as the sliding head 162 receives the elastic force of the pressurizing elastic body 166 due to the oil leakage from the pressure gauge PG. Moved to contact the distal end of the protruding head portion 174.

If the protruding bar 162b in contact with the distal end of the protruding head portion 174 continues to move downward in FIG. 3, the protruding head portion 174 pushed by the protruding bar 162b is moved to the right side of FIG. 4. Subsequently, when the protruding bar 162b continues to move downward and the contact between the distal end of the protruding head portion 174 and the protruding bar 162b is released, it is shown in FIG. 4 by the elastic force of the stopper elastic body 176. Likewise, the protruding head portion 174 is moved to its original position to limit the protruding bar 162b from moving upward in FIG. 4.

The stopper guide part 175 is coupled to the stopper housing part 171 and disposed in the stopper housing part 171. The stopping guide part 175 is connected to the stopping moving block part 172 to guide the movement of the stopping moving block part 172.

The stopper guide part 175 is provided in a circular rod shape. The stopper guide parts 175 according to the present embodiment are provided in pairs and are spaced apart from each other, and the stopper moving block part 172 passes through the block through hole 173a of the block body part 173. To guide the movement.

The stopper elastic body 176 is disposed inside the stopper housing part 171. The stopping elastic body 176 is supported on the inner wall of the stopper housing part 171 and is connected to the stopping moving block 172 to elastically press the stopping moving block 172.

In this embodiment, the stopper elastic body 176 is provided with a pair of coil springs. The stopper elastic body 176 has one end coupled to the inner wall of the stopper housing part 171 and the other end coupled to the block body part 173 to elastically stop the moving block 172 for stopping. Pressurize.

As described above, the oil blocking unit 160 according to the present embodiment is connected to the sliding head portion 162 moved by the pressing force of the elastic body for pressure 166, so that the sliding head portion 162 is in the original position (pressure gauge PG). By having a stopper 170 for restricting the movement of oil leak occurs in the position before the pressure of the oil recovery line 120 is lowered), by blocking the communication hole 144 of the oil blocking unit 160 Even if the pressure of the oil return line 120 rises, the sliding head part 162 prevents the sliding head portion 162 from moving to its original position (a position before the oil leak occurs in the pressure gauge PG and the pressure of the oil return line 120 drops). A broken pressure gauge (PG) can continuously block the flow of oil.

On the other hand, the pressing force adjusting unit 167 is connected to the pressing elastic body 166 to adjust the pressing force of the pressing elastic body 166. As shown in detail in FIGS. 2, 3, and 6, the pressing force adjusting unit 167 is formed with a screw thread on an outer circumferential surface thereof and is engaged with the pressing force adjusting screw hole 161d of the blocking chamber part 161 by rotation. It includes an adjustable rotating screw portion 167a which is moved in a direction approaching and spaced apart with respect to the sliding head portion 162.

The adjustment rotating screw portion 167a is provided in a circular rod shape, and a screw thread engaged with the thread formed on the inner circumferential surface of the pressing force adjusting screw hole 161d is provided on the outer circumferential surface of the adjustment rotating screw portion 167a.

The upper end of the adjustment rotating screw 167a is provided with a hexagonal groove to which a separate rotating mechanism (not shown) for rotating the adjusting rotating screw 167a is connected.

As shown in FIG. 2, the pressurizing elastic body 166 is disposed between the adjusting rotating screw part 167a and the sliding head part 162. Therefore, when the distance between the adjusting rotary screw portion 167a and the sliding head portion 162 is adjusted by the relative movement of the sliding rotary screw portion 167a with respect to the sliding head portion 162, the compression distance of the pressing elastic body 166 is adjusted. The elastic force applied to the sliding head portion 162 by the pressing elastic body 166 is adjusted accordingly.

Hereinafter, the operation of the pipe line connection structure for supplying oil to the bearing for the voltage motor of the present embodiment will be based on the replacement of the broken pressure gauge PG and automatic shutoff of oil leakage from the broken pressure gauge PG. It demonstrates with reference to FIG.

First, the operation of replacing the broken pressure gauge PG will be described. For the replacement of the broken pressure gauge PG, the operator first rotates the rotary knob 155 of the opening and closing part 150 to connect the communication hole 144. By closing it shuts off the oil flow to the pressure gauge PG.

Thereafter, the broken pressure gauge PG is separated from the gauge coupler 148, and then a new pressure gauge PG is coupled to the gauge coupler 148. At this time, the oil supply from the oil supply line 110 to the bearing (not shown) is maintained without interruption, so that the induction motor is normally operated even during the operation of replacing the pressure gauge PG.

As such, the pipe line connection structure for supplying oil to the bearing for the high voltage motor according to the present embodiment includes an opening and closing part 150 for opening and closing the communication hole 144 through which oil flowing through the pressure gauge PG passes. When the pressure gauge PG is replaced, only the flow of oil flowing to the pressure gauge PG is stopped without the need to stop the flow of the oil supplied from the oil supply line 110 to the bearing (not shown). ) Can be replaced, thereby operating the induction motor even during the replacement of the pressure gauge (PG).

Next, an operation in which the oil shutoff unit 160 automatically shuts off oil leakage from the broken pressure gauge PG will be described.

As a large amount of oil leaks from the pressure gauge PG due to breakage of the pressure gauge PG, the amount of oil supplied to a bearing (not shown) decreases, thereby lowering the pressure of the oil recovery line 120. In this case, the internal pressure of the pressure space 161a communicated with the oil return line 120 by the pressure transmission connection pipe 165 is also lowered. When the internal pressure of the pressure space 161a is lowered in this way, the sliding head portion 162 is moved by the pressing force of the pressing elastic body 166.

By the movement of the sliding head 162, as shown in FIG. 6, the blocking sheet portion 164 is moved to the communication hole 144 and in close contact with the partition wall 143 to close the communication hole 144. By doing so, the oil flow from the oil supply line 110 to the pressure gauge PG is blocked and thus the oil leakage from the broken pressure gauge PG is blocked.

At this time, the protruding bar 162b contacts the distal end of the protruding head portion 174 by the movement of the sliding head portion 162. As described above, since the distal end of the protruding head portion 174 has an obliquely inclined shape, the protruding head portion 174 is pushed by the protruding bar 162b and moved laterally.

When the contact of the protruding bar 162b and the distal end of the protruding head portion 174 is released by the continuous movement of the protruding bar 162b, the protruding head portion 174 pushed by the protruding bar 162b is a stopper elastic body ( 176 is moved to its original position as shown in FIG. 4 to restrict the protrusion bar 162b from moving upward in FIG. 4.

The lower end of the protruding head portion 174 is in contact with the protruding bar 162b so that the sliding head portion 162 returns to its original position (oil leak occurs at the pressure gauge PG) before the pressure of the oil return line 120 drops. By restricting the movement to the position, even if the pressure of the oil return line 120 is increased by closing the communication hole 144 of the oil shutoff portion 160, the sliding head portion 162 is returned to its original position (pressure gauge PG). Oil leakage occurs in the oil return line (120 position before the pressure drop) is limited to move, so that the flow of oil from the oil supply line 110 to the broken pressure gauge (PG) is continuously Is blocked.

As such, the pipe line connection structure for supplying oil to the bearing for the high voltage motor according to the present embodiment opens and closes the flow of oil moved to the pressure gauge PG, and breaks the pressure when the pressure gauge PG breaks. The oil leakage automatic shutoff valve unit 130 for opening / closing the oil from the gauge PG is provided to replace the broken pressure gauge PG without stopping supply of oil to the bearing (not shown). It can automatically stop oil leakage from broken pressure gauge (PG).

The use of all examples or exemplary terms (eg, etc.) in the present invention is merely for the purpose of describing the present invention in detail, and the scope of the present invention is limited by the examples or exemplary terms unless the scope of the claims is defined. It doesn't happen. Also, one of ordinary skill in the art appreciates that various modifications, combinations and changes can be made in accordance with design conditions and factors within the scope of the appended claims or their equivalents.

Therefore, the spirit of the present invention should not be limited to the described embodiments, and the scope of the spirit of the present invention is defined not only in the claims below, but also in all the ranges equivalent to or equivalent to those of the claims. Will belong to.

110: oil supply line 120: oil return line
130: oil leakage automatic shut off valve unit
140: valve body portion 141: oil inlet
142: oil spill 144: communication hole
150: opening and closing portion 151: drive shaft for opening and closing
153: opening and closing seat portion 155: knob for rotation
160: oil cut off 161: cut off chamber
161b: chamber through hole 161c: through slot hole
162: sliding head portion 162a: head body
162b: protruding bar 163: blocking shaft portion
164: blocking seat portion 165: connection pipe for pressure transmission
166: pressure elastic body 167: pressing force adjustment unit
167a: adjusting rotation screw part 170: stopper part
171: stopper housing part 172: stopper moving block part
173: block body portion 174: protruding head portion
175: guide part for the stopping 176: elastic body for the stopping
PG: pressure gauge RV: regulator valve
BH: bearing housing

Claims (3)

In a pipe line connection structure for supplying oil to a bearing for a high voltage motor supplying oil to a bearing supporting a rotor shaft of a motor,
An oil supply line 110 connected to the motor and supplying the oil to the bearing;
An oil recovery line 120 connected to the motor to recover the oil supplied to the bearing;
A regulator valve (RV) mounted to the oil supply line 110 to maintain a constant pressure of the oil delivered to the bearing;
A pressure gauge (PG) connected to the oil supply line (110) and displaying a pressure of the oil delivered to the bearing; And
The pressure connected to the oil supply line 110 and the pressure gauge (PG), opening and closing the flow of the oil that is moved to the pressure gauge (PG), the pressure broken when the pressure gauge (PG) breaks Opening and closing combined oil leakage automatic shutoff valve unit 130 for blocking the leakage of the oil in the gauge (PG),
The opening and closing combined oil leakage automatic shutoff valve unit 130,
The oil inflow path 141 through which the oil flows in, the oil outflow path 142 through which the oil flows out, and the communication hole 144 communicating the oil inflow path 141 and the oil outflow path 142 are provided. The valve body portion 140 is provided;
An opening and closing unit 150 connected to the valve body 140 and opening and closing the communication hole 144; And
An oil shutoff part coupled to the valve body 140 and connected to the oil recovery line 120 and closing the communication hole 144 according to the pressure of the oil passing through the oil recovery line 120 ( 160),
The opening and closing part 150,
A screw thread is formed on an outer circumferential surface thereof to be engaged with the opening / closing screw hole 145 provided in the valve body part 140, and the opening and closing drive shaft part moving in a direction approaching and spaced apart from the communication hole 144 by rotation ( 151);
It is coupled to one side end region of the opening and closing drive shaft 151, the opening and closing seat portion which is disposed in the oil inflow path 141 to open and close the communication hole 144 in accordance with the movement of the opening and closing drive shaft 151. (153); And
It is coupled to the other end region of the opening and closing drive shaft 151, and includes a rotating handle portion 155 disposed outside the valve body portion 140,
The oil blocking unit 160,
A blocking chamber part 161 coupled to the valve body part 140 and provided with a hollow inside;
A sliding head part 162 connected to an inner wall of the blocking chamber part 161 so as to be slidably moved, and having one outer wall forming a pressure space 161a together with an inner wall of the blocking chamber part 161;
The through-holes connected to the sliding head part 162 and the through-holes 161b provided in the blocking chamber part 161 and the through-holes provided in the valve body part 140 communicate with the chamber through-holes 161b. A blocking shaft portion 163 penetrating the ball 146;
The blocking seat portion is coupled to the distal end of the blocking shaft portion 163 and disposed in the oil outlet passage 142 to close the communication hole 144 according to the movement of the blocking shaft portion 163. 164);
A pressure connection pipe 165 connected to the oil recovery line 120 and the blocking chamber part 161 and communicating the interior of the oil recovery line 120 with the pressure space 161a;
It is disposed inside the blocking chamber 161, is supported by the blocking chamber 161 and connected to the sliding head 162 to direct the sliding head 162 to the communication hole 144. Pressing elastic body 166 to pressurize with; And
The oil is supplied to the bearing for the high voltage motor which is supported by the blocking chamber part 161 and is connected to the sliding head part 162 and includes a stopper part 170 which restricts the movement of the sliding head part 162. Pipeline connection structure for The method of claim 1,
The sliding head portion 162,
A head body 162a disposed in the blocking chamber part 161; And
It is coupled to the head body 162a, and includes a protruding bar 162b penetrating through the through slot hole 161c formed in the blocking chamber portion 161,
The stopper unit 170,
A stopper housing part 171 coupled to an outer wall of the blocking chamber part 161;
A stopper moving block part 172 supported by the stopper housing part 171 and slidably connected to the stopper housing part 171 and in contact with the protruding bar 162b;
The stopper moving part 172 is coupled to the stopper housing part 171 and disposed in the stopper housing part 171, and is connected to the stopper moving block part 172. Stopping guide portion 175 for guiding the movement of the; And
The stopper is disposed inside the housing part 171, is supported on an inner wall of the stopper housing part 171, and is connected to the stopper moving block part 172 to stop the moving block part ( A stopping elastic body 176 elastically pressing the 172,
The stopping moving block unit 172,
A block body part 173 having a block through hole 173a through which the stopper guide part 175 penetrates; And
Protruding head portion 174 protruding from the block body portion 173 is provided,
The distal end of the protruding head portion 174, the pipe line connection structure for supplying oil to the bearing for the high voltage motor is provided in an inclined shape that the length of the block body portion 173 is longer from the top to the bottom. The method of claim 1,
The oil blocking unit 160 further includes a pressing force adjusting unit 167 connected to the pressing elastic body 166 to adjust the pressing force of the pressing elastic body 166.
The pressing force adjusting unit 167,
A screw thread is formed on an outer circumferential surface thereof and is engaged with the pressing force adjusting screw hole 161d formed in the blocking chamber part 161, and the adjusting rotating screw part is moved in a direction approaching and spaced apart from the sliding head part 162 by rotation. A pipe line connection structure for supplying oil to a bearing for a high voltage motor including 167a.

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