KR101528078B1

KR101528078B1 - Vertical Pump For Transferring Oil

Info

Publication number: KR101528078B1
Application number: KR1020130165050A
Authority: KR
Inventors: 장민광
Original assignee: 윌로펌프 주식회사
Priority date: 2013-12-27
Filing date: 2013-12-27
Publication date: 2015-06-11

Abstract

Disclosed is a type pump for oil delivery that prevents leakage of oil supplied to a bearing supporting a connecting shaft connecting a rotating shaft of a motor and an impeller. In the present invention, since the oil chamber in which the oil leaked between the bearing housing and the connection shaft is accommodated is formed on the upper surface of the bearing housing provided with the bearing, the oil leaked between the bearing housing and the connection shaft It does not leak to the outside. Therefore, there is an effect that the surrounding parts are prevented from being damaged by the oil.

Description

[0001] The present invention relates to a vertical pump for transferring oil,

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a pump for oil delivery, which prevents leakage of oil supplied to a bearing supporting a connecting shaft connecting a rotating shaft of a motor and an impeller.

A pump is a device that transports a fluid by the action of pressure. A vertical pump stands vertically and is a device that pumps up the fluid flowing into the inlet and discharges it through the outlet pipe.

A conventional pump for feeding oil will be described with reference to Fig. 1 is a schematic cross-sectional view showing a connection portion between a motor side and an impeller side of a conventional oil type feed pump.

As shown in the drawing, the conventional oil-feeding type pump includes a motor 10 positioned on the upper side and having a rotation axis 11. (Not shown) is provided at the lower side of the motor 10 for immersing in the oil to be discharged and forcibly discharging the oil by centrifugal force. The impeller and the rotary shaft 11 are connected to each other by a connecting shaft 21 do.

Thus, when the motor 10 is driven to rotate the rotary shaft 11, the connecting shaft 21 and the impeller rotate in association with the rotary shaft 11, and the oil is forcedly discharged from the discharge pipe (not shown) .

The length of the connecting shaft 21 is formed to correspond to the place where the oil to be discharged is stored, and thus has a relatively long length. Therefore, when the connecting shaft 21 is rotated by the rotating shaft 11, the connecting shaft 21 can vibrate in the radial direction.

A support tube 31 is provided to surround the upper portion of the connection shaft 21 and a bearing housing 33a is provided on the inner circumferential surface of the support tube 31 to prevent the connection shaft 21 from vibrating in the radial direction. . A bearing 35 is supported on the bearing housing 33a to support the upper portion of the connecting shaft 21.

The connecting shaft 21 is provided with a fixing nut 37a and a detent ring 37b for preventing the bearing 35 from flowing along the longitudinal direction of the connecting shaft 21. The lower surface of the bearing housing 33a And the cover 33b is engaged.

One end side of the supply pipe 39 is connected to one side of the discharge pipe and the other end side of the supply pipe 39 is connected to one side of the upper side of the bearing housing 33a. Thus, a part of the oil discharged through the discharge pipe is supplied to the bearing housing 33a through the supply pipe 39 to lubricate the bearing 35. [

One side of a discharge pipe (not shown) for discharging the oil supplied to the bearing housing 33a is connected to the other side of the bearing housing 33a.

The gap between the upper surface of the bearing 35 and the upper surface of the bearing housing 33a is relatively narrow. Therefore, the conventional oil pump for feeding oil has a problem in that the pressure of the oil supplied from the supply pipe 39 to the bearing housing 33a is high or the oil supplied to the bearing housing 33a by the rotation of the connecting shaft 21 If the pressure fluctuates too much, there is a disadvantage that the oil leaks into the gap between the bearing housing 33a and the connecting shaft 21 and damages surrounding parts.

Prior art relating to a type of pump for oil transfer is disclosed in Korean Patent Registration No. 10-1019856 and Korean Registered Utility Model No. 20-0328865.

SUMMARY OF THE INVENTION It is an object of the present invention to provide an oil feeding device capable of preventing leakage of oil supplied to a bearing supporting a connecting shaft connecting a rotating shaft of a motor and an impeller, Type pump.

According to an aspect of the present invention, there is provided a reciprocating pump for transferring oil, comprising: a motor having a rotary shaft; An impeller which is rotatably installed and which discharges and discharges oil; An upper end connected to a lower end of the rotary shaft, a lower end connected to the impeller, and connected to the impeller; A support tube installed to surround the connection shaft; A bearing housing formed on an inner circumferential surface of the support tube and surrounding the connection shaft; A bearing installed inside the bearing housing to support the connection shaft; And a supply pipe that receives the oil discharged from the impeller and supplies the oil to the inside of the bearing housing. An oil chamber accommodating and storing oil leaked through a gap between the bearing housing and the connection shaft is stored on an upper surface of the bearing housing. .

In the present invention, since the oil chamber in which the oil leaked between the bearing housing and the connection shaft is accommodated is formed on the upper surface of the bearing housing provided with the bearing, the oil leaked between the bearing housing and the connection shaft It does not leak to the outside. Therefore, there is an effect that the surrounding parts are prevented from being damaged by the oil.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic cross-sectional view showing a connection portion between a motor side and an impeller side of a conventional oil pump for oil feed.
2 is a perspective view of a pump for oil transfer according to one embodiment of the present invention.
Fig. 3 is a schematic longitudinal sectional view of Fig. 2; Fig.
4 is an enlarged view of the "A" portion of FIG.

It should be noted that, in the specification of the present invention, the same reference numerals as in the drawings denote the same elements, but they are numbered as much as possible even if they are shown in different drawings.

Meanwhile, the meaning of the terms described in the present specification should be understood as follows.

The word " first, "" second," and the like, used to distinguish one element from another, are to be understood to include plural representations unless the context clearly dictates otherwise. The scope of the right should not be limited by these terms.

It should be understood that the terms "comprises" or "having" does not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, or combinations thereof.

It should be understood that the term "at least one" includes all possible combinations from one or more related items. For example, the meaning of "at least one of the first item, the second item and the third item" means not only the first item, the second item or the third item, but also the second item and the second item among the first item, Means any combination of items that can be presented from more than one.

The term "above" means not only when a configuration is formed directly on top of another configuration, but also when a third configuration is interposed between these configurations.

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

Fig. 2 is a perspective view of a pump for oil transfer according to an embodiment of the present invention, Fig. 3 is a schematic longitudinal sectional view of Fig. 2, and Fig. 4 is an enlarged view of an "A"

As shown in the drawing, the oil-feeding type pump according to the present embodiment may include a support plate 110, and the support plate 110 may be fixedly installed in a place where the oil to be discharged is stored.

A support pipe 120 may be installed on the upper surface of the support plate 110 and a motor 130 having a rotation axis 131 may be installed on the upper surface of the support pipe 120. At this time, the rotary shaft 131 may protrude downward and be positioned inside the support tube 120.

A protective pipe 140 may be provided on the lower surface of the support plate 110 and a casing 151 may be coupled to the lower surface of the protective pipe 140. The casing 151 is immersed in the oil to be discharged, and the impeller 153 can be rotatably installed therein. The lower end of the connecting shaft 155 is coupled to the center of the impeller 153 and the upper end of the connecting shaft 155 can be engaged with the lower end of the rotating shaft 131. That is, the upper end of the connection shaft 155 may be positioned inside the support pipe 120 through the protective pipe 140.

Thus, when the motor 130 is driven to rotate the rotation shaft 131, the connection shaft 155 is rotated by the rotation shaft 131, and the impeller 153 is rotated by the connection shaft 155. The oil introduced into the casing 151 through the inlet 151a formed at one side of the casing 151 is discharged through the outlet 151b formed at the other side of the casing 151 by the centrifugal force of the impeller 153 do.

One end side of the discharge pipe 161 may be connected to the discharge port 151b and the other side of the discharge pipe 161 may be located outside the oil storage place to guide the discharge of the oil.

The connection shaft 155 is relatively long. As a result, when the connection shaft 155 rotates, it can vibrate in the radial direction. A bearing housing 121 having an open top and bottom can be installed on an inner circumferential surface of a support pipe 120 provided to surround the connection shaft 155. The bearing housing 121 is provided with a bearing 125, Can be installed. The outer circumferential surface of the connecting shaft 155 is in contact with the inner ring of the bearing 125.

The connection shaft 155 may be provided with a fixing nut 157a and a detent ring 157b for preventing the bearing 121 from flowing along the longitudinal direction of the connection shaft 155, A cover 123 may be coupled to the lower end surface.

The oil supplied to the discharge pipe 161 from the impeller 153 may be supplied to the bearing 125 for lubricating the bearing 125 in order to smoothly operate the bearing 125 .

One side of the supply pipe 163 may be connected to one side of the discharge pipe 161 and the other side of the supply pipe 163 may be connected to the upper side of the bearing housing 121. Since the oil is supplied to the inside of the bearing housing 121 through the supply pipe 163, the bearing 125 installed in the bearing housing 121 is lubricated.

If the pressure of the oil supplied to the interior of the bearing housing 121 from the supply pipe 163 is too high or if the pressure of the oil supplied to the bearing housing 121 by the rotation of the connecting shaft 155 varies greatly, The oil may leak into the gap between the connecting shaft 121 and the connecting shaft 155.

In order to prevent this, the oil pump for oil feeding according to the present embodiment has an oil chamber which can receive and store the oil leaked through the gap between the open upper surface of the bearing housing 121 and the connection shaft 155, As shown in Fig.

The oil chamber is an inner space of the receiving tube 127 installed on the upper surface of the bearing housing 121 so as to surround the connecting shaft 155. Therefore, even if the oil leaks between the bearing housing 121 and the connecting shaft 155, the oil is stored in the oil chamber inside the receiving tube 127, so that the oil is prevented from leaking to the outside.

The lower surface of the receiving tube 127 communicates with the inside of the bearing housing 121 through the opened upper surface of the bearing housing 121. The oil stored in the oil chamber is supplied again to the inside of the bearing housing 121, (125).

It is preferable that the inner circumferential surface of the open top surface of the bearing housing 121 is inserted into the outer circumferential surface of the lower portion of the receiving tube 127 in order to prevent the oil from leaking between the bearing housing 121 and the receiving tube 127.

A stepped surface having a horizontal tread 127aa and a vertical tread 127ab is formed on the outer peripheral surface of a lower portion of the receiving tube 127 to further prevent oil from leaking between the bearing housing 121 and the receiving tube 127. [ (127a) may be formed. At this time, it is natural that the horizontal frame 127aa is held in contact with the upper surface of the bearing housing 121, and the vertical frame 127ab is held in contact with the open upper surface inner peripheral surface of the bearing housing 121. [

A sealing member 129 for preventing leakage of oil may be interposed between the bearing housing 121 and the outer peripheral surface of the lower portion of the receiving tube 127 and between the inner peripheral surface of the upper portion of the receiving tube 127 and the connecting shaft 155 have.

One end of the discharge pipe 165 for discharging the oil supplied to the inside of the bearing housing 121 to the outside of the bearing housing 121 is connected to the cover 123 coupled to the lower surface of the bearing housing 121, . The discharge pipe 165 may be connected to one side of the upper portion of the bearing housing 121.

An oil chamber in which oil leaked between the bearing housing 121 and the connecting shaft 155 is accommodated and stored on the upper surface of the bearing housing 121 in which the bearing 125 is installed is formed The oil leaked between the bearing housing 121 and the connecting shaft 155 is not leaked to the outside.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the invention. Will be clear to those who have knowledge of. Therefore, the scope of the present invention is defined by the appended claims, and all changes or modifications derived from the meaning and scope of the claims and their equivalents should be interpreted as being included in the scope of the present invention.

110: Base
120: Support tube
121: Bearing housing
125: Bearings
127:
131:
155: connection axis

Claims

A motor having a rotary shaft;
An impeller which is rotatably installed and which discharges and discharges oil;
An upper end connected to a lower end of the rotary shaft, a lower end connected to the impeller, and connected to the impeller, for transmitting rotational force of the rotary shaft to the impeller;
A support tube installed to surround the connection shaft;
A bearing housing formed on an inner circumferential surface of the support tube and surrounding the connection shaft;
A bearing installed inside the bearing housing to support the connection shaft;
A supply pipe for receiving oil discharged from the impeller and supplying the oil to the inside of the bearing housing;
And an oil chamber formed in an upper surface of the bearing housing and communicating with the interior of the bearing housing to receive and store oil leaked through a gap between the bearing housing and the connection shaft,
A stepped surface having a horizontal frame and a vertical frame is formed on an outer peripheral surface of a lower portion of the receiving pipe,
Wherein the horizontal frame is held in contact with the upper surface of the bearing housing, and the vertical frame is contactably supported by the upper surface side inner peripheral surface of the bearing housing.

delete

The method according to claim 1,
Wherein a sealing member is interposed between the bearing housing and an outer peripheral surface of a lower portion of the receiving tube, and between an inner peripheral surface of an upper portion of the receiving tube and the connecting shaft.