KR200327567Y1 - Tube seal - Google Patents

Abstract

The present invention relates to a shaft device of a rocking piston pump, and more specifically, a pumping fluid and an eccentric shaft drive leaking toward the eccentric shaft by installing a flexible cylindrical cover around the eccentric shaft instead of a mechanical seal, which is a conventional shaft device. This invention relates to a shaft device of a rocking piston type pump which prevents mixing of lubricating oils and prevents pumping fluids from flowing out of the pump. The axial shaft is blocked by a separate cover cylinder around the eccentric shaft. By preventing the mixing of the lubricating oil and the pumping fluid required to prevent damage of the various parts such as bearings and packing also has the effect of maximizing the life of the pump.

Description

Shaft device of oscillating piston type pump {TUBE SEAL}

The present invention relates to a shaft device of a rocking piston pump, and more specifically, to prevent the mixing of the pumping fluid and the eccentric driving lubricating oil covering the eccentric shaft and leaking toward the eccentric shaft, as well as pumping out of the pump. It relates to a shaft device of a rocking piston pump to prevent the fluid outflow.

In general, the oscillating piston pump is a twin-cylinder pump as a representative will be described for the twin-cylinder pump.

The bicylinder pump refers to a pump of a new concept having the function of a rotary pump for pumping a general liquid, a highly viscous liquid, and the like, as well as a vacuum pump for pumping gas. Therefore, the present invention is an improvement of the twin-cylinder pump (hereinafter, referred to as a conventional design) previously filed by the present applicant. First, the known twin-cylinder pump will be described as follows.

FIG. 1 is a schematic cross-sectional view of a conventional bicylinder pump, and FIG. 2 is a cross-sectional view taken along the line AA of FIG. A cylinder portion 101 is provided, and on the other side, a pair of eccentric shafts 200 are mounted to protrude into the respective circular groove portions 102 to eccentrically rotate through the driving part 300. Inside the 101 is characterized in that the piston portion 400 consisting of a pair of circular bodies 401 fixed to the eccentric shaft 200 to move the fluid through the rotational rotation is mounted.

3 is an enlarged view of a portion B of FIG. 1, in which a pair of eccentric shafts 200 are mounted at the center of the other side wall 103 on which a pair of circular grooves 102 constituting the cylinder portion 101 are formed. The through hole 104 is provided.

In addition, the eccentric shaft 200 is the center of each circular body 401 constituting the rotating shaft 201 and the piston 400 is mounted to the through hole 104 formed in the other side wall 103 through a bearing. It consists of an eccentric rotation shaft 202 mounted on the inner diameter through a separate mounting ring 204 and the inclined shaft 203 connecting the rotation shaft 201 and the eccentric rotation shaft 202 to each other.

Therefore, when the pair of eccentric shaft 200 is rotated up and down through the driving unit 300, the piston unit 400 mounted on the eccentric shaft 200 is rotated eccentric rotation in the cylinder portion 101 By forcing the fluid can be moved.

That is, the respective circular bodies 401 constituting the piston 400 mounted on the respective circular grooves 102 constituting the cylinder portion 101 rotate eccentrically, so that the fluid flows from the inlet as described above. By forcibly conveying to improve the discharge pressure of the fluid to be able to transport the fluid.

However, in the operation of the twin-cylinder pump, the pumped fluid is introduced into the gap between the both ends of the cylindrical body constituting the piston and the inner and outer walls of the cylinder, and then the introduced fluid is mixed with the lubricating oil. And various parts of the packing are easily corroded or damaged, causing problems of the pump.

Therefore, the present invention is designed to solve the above problems, to prevent the pumping fluid from penetrating around the eccentric shaft during operation to provide an eccentric shaft sealing device for a dual-cylinder pump that prevents the pumping fluid from mixing the lubricating oil. The purpose.

In addition, by keeping the pressure of the lubricating oil filled inside the cover cylinder surrounding the eccentric shaft and the pumped fluid filled outside the cover cylinder which is the inner hole of the piston, the middle of the cover rubber is prevented from being deformed due to the overpressure of the pumped fluid during operation. It also has a purpose.

In addition, it has a purpose to prevent the phenomenon that the middle portion of the cover cylinder swells or swells due to the pressure change of the pumping fluid by embedding a circular ring on the side wall of the cover cylinder surrounding the eccentric shaft.

The present invention for achieving the above object is provided with a cylinder portion consisting of a pair of circular grooves communicating with each other on one side of the main body and having an inner and an outer wall, the inner wall is formed with an axial mounting hole in the inner wall The shaft mounting hole is provided with a pair of eccentric shafts for eccentric rotation through the drive unit, and the cylinder portion is usually equipped with a piston portion consisting of a pair of circular bodies fixed to the eccentric shaft to move the fluid through pivotal rotation. The bicylinder pump of claim 1, wherein a cover cylinder is provided that flows around the eccentric shaft to prevent a pumping fluid from penetrating into the eccentric shaft between the shaft mounting hole of the inner wall and the inner central hole of the piston. It is characterized by being.

1 is a schematic cross-sectional configuration diagram showing a conventional bicylinder pump.

2 is a cross-sectional view taken along the line A-A of FIG.

3 is an enlarged view of a portion B of FIG. 1;

Figure 4 is an enlarged cross-sectional view showing the main portion of the bicylinder pump according to the present invention.

5 is a cross-sectional view showing another embodiment of a cover cylinder according to the present invention.

<Description of Symbols for Main Parts of Drawings>

1: main body

2: cylinder part

21: circular groove

211: inner wall, 212: outer wall

22: shaft mounting hole

3: eccentric shaft

4: piston part

41: circular body

411: inside concourse

5: cover cylinder

51: lubricant filling unit

52: pumping fluid collection unit

53: lubricant filling hole

54: plug plug

55: round ring rod

6: bearing sleeve

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

Figure 4 is an enlarged cross-sectional view showing the main portion of the dual-cylinder pump according to the present invention, the configuration thereof will be described first.

One side of the main body 1 is provided with a cylinder portion 2 consisting of a pair of circular grooves 21 communicating with each other and having inner and outer walls 211 and 212, and an inner wall 211 in each of the circular grooves 21. The shaft mounting hole 22 is formed in the shaft mounting hole 22 is provided with a pair of eccentric shaft (3) which is eccentrically rotated through a driving unit (not shown), the cylinder portion (2) In the conventional bicylinder pump, which is fixed to the shaft (3) and is equipped with a piston portion (4) consisting of a pair of circular bodies (41) for moving a fluid through pivotal rotation,

Between the shaft mounting hole 22 formed in the inner wall 211 and the inner central hole 411 of the piston 4, a pumping fluid passes through both ends of the piston 4 toward the eccentric shaft 3. It is characterized in that it is provided with a cover cylinder (5) capable of flowing around the eccentric shaft (3) to prevent penetration.

And between the inner side of the cover cylinder (5) surrounding the eccentric shaft (3) and the outer side of the eccentric shaft (3) is provided with a lubricating oil filling unit 51 is filled with the lubricating oil required for operation in the device, the cover cylinder ( Collecting the pumping fluid in which the pumping fluid flowing through the end of the piston 4 is collected between the outer side of 5) and the inner central hole 411 of each of the circular bodies 41 constituting the piston 4. A part 52 is provided, and the lubricating oil filling part 51 is connected to the lubricating oil filling hole 53, and the end thereof is closed by a plug plug 54.

In addition, the cover cylinder (5) is composed of a rubber having excellent flowability.

Figure 5 shows another embodiment of the cover cylinder according to the present invention, inside the side wall of the cover cylinder (5) is a circular ring 55 is built to prevent depression and swelling.

Hereinafter will be described the operational relationship of the present invention configured as described above.

As shown in FIG. 4, when the upper and lower pairs of eccentric shafts 3 are rotated through the driving unit 31, the piston 4 mounted on the eccentric shaft 3 is disposed in the cylinder unit ( By rotating in 2), it is the normal operation to improve the discharge pressure of the fluid by forcibly moving the fluid introduced from the inlet.

In addition, in performing the operation as described above, the inner and outer walls constituting both ends of the piston portion 4 and the cylinder portion 2 in the process of turning the piston 4 to the inside of the cylinder portion 2 ( The pumping fluid is introduced from the cylinder portion 2 through the gap between the 211 and 212, and a separate cover cylinder 5 is mounted around the outer side of the eccentric shaft 3 so that the pumping fluid is rotated by the eccentric shaft 3. This is to prevent mixing with the lubricant required for. That is, it is possible to prevent corrosion and damage of mechanical elements such as bearings and packings caused by mixing of lubricating oil and pumping fluid.

The cover cylinder (5) wraps around the eccentric shaft (3), and the inner lubricant filling portion (51) fills the lubricant and blocks the lubricant filling hole (53) with a plug plug (54) to cover the inside and outside of the cover cylinder (5). The pressure is balanced, so that the middle of the cover cylinder 5 can be prevented from sinking even if the pumping fluid collection unit 52 is overpressured, and it does not swell even if the vacuum pressure is applied.

Therefore, the cover cylinder 5 surrounding the eccentric shaft 3 is installed as described above, so that the overpressure or vacuum pressure is applied to the pumping fluid collecting unit 52, the eccentric shaft 3, the cover cylinder 5, and the cover. The cylinder 5 and the shaft mounting hole 22 can prevent the phenomenon of mutual interference.

As described above, the present invention blocks the circumference of the eccentric shaft through a separate cover cylinder, thereby preventing mixing of lubricants and pumping fluids necessary for driving the eccentric shaft and preventing damage to various parts such as bearings and packings. It has the effect of maximizing the lifetime.

In addition, the inner and outer pressure of the cover cylinder surrounding the eccentric shaft is always kept constant, thereby preventing overload of the driving unit by preventing rotational interference of the eccentric shaft due to an overpressure phenomenon generated outside the cover cylinder.

The present invention has been described with reference to the embodiments shown in the drawings, which are merely exemplary, and those skilled in the art will appreciate various modifications and fungi therefrom.

It will be appreciated that other such embodiments are possible.

Claims (4)

One side of the main body 1 is provided with a cylinder portion 2 consisting of a circular groove portion 21 having inner and outer walls 211 and 212, and the shaft mounting hole 22 in the inner wall 211 in the circular groove portion 21. The shaft mounting hole 22 is provided with an eccentric shaft 3 for eccentric rotation through the drive unit 31, and the cylinder portion 2 is fixed to the eccentric shaft 3 to rotate the rotation. In a conventional oscillating piston pump equipped with a piston portion 4 consisting of a circular body 41 for moving a fluid through, The eccentric shaft (3) between the shaft mounting hole 22 of the inner wall 211 and the inner central hole constituting the piston 4 to prevent the pumping fluid from penetrating toward the eccentric shaft (3) Shaft device of the rocking piston-type pump, characterized in that the cover cylinder (5) which is wrapped around the flow. The rocking piston pump as claimed in claim 1, wherein the lubricant filling part (51) in the cover cylinder (5) is filled with lubricating oil, and the lubricating oil filling hole (53) is closed with a plug plug (54). Shaft of the device. 2. A shaft device according to claim 1, wherein the cover cylinder (5) is made of rubber having fluidity. 4. A shaft device according to claim 1 or 3, wherein a circular ring (55) is further provided inside the side wall of the cover cylinder (5) to prevent depression and swelling.