WO2017150877A1

WO2017150877A1 - Twin-cylinder pump

Info

Publication number: WO2017150877A1
Application number: PCT/KR2017/002176
Authority: WO
Inventors: 나기호; 나필찬
Original assignee: (주)필택
Priority date: 2016-02-29
Filing date: 2017-02-28
Publication date: 2017-09-08

Abstract

Provided is a twin-cylinder pump for preventing one-sided wear and the leakage of fluid, which are caused by the eccentric rotation and rotary motion of each rocker shaft, and enabling replacement or repair to be simply and easily performed, the pump comprising: exposed spaces respectively formed at the top and the bottom of the twin-cylinder pump body between a transmission unit and an operating unit so as to be exposed to the outside of a pump body; eccentric members respectively connected to the transmission unit and provided in each exposed space so as to be eccentrically rotatable; and rocker shafts respectively provided such that one end of each rocker shaft is mounted in a rocker shaft bearing housing spherically coupled to each eccentric member, and another side of each rocker shaft is supported by a spherical bearing housing mounted at one surface of the operating unit, and then is connected to each piston support provided in a cylinder of the operating unit, so as to allow a piston to rotate. Therefore, the twin-cylinder pump has effects of quickly performing assembly and maintenance in a short time without difficulty or inconvenience and further increasing the reliability of products.

Description

Bicylinder pump

The present invention relates to a twin-cylinder pump, and more particularly, to a single-cylinder pump to prevent the wear and leakage of fluid due to the eccentric rotation and pivoting movement of each oscillation shaft, as well as to replace or repair. It is about.

In general, a bicylinder pump refers to a pump used for a purpose of pumping air and gas as well as a function of a rotary pump that pumps a fluid and a highly viscous liquid.

Prior art related to such a bicylinder pump includes Korean Patent Publication No. 10-1997-0009955 (hereinafter referred to as 'Patent Document 1'), filed by the present inventor or applicant, and Korean Registered Utility Model No. 20-0327567 'Patent Document 2'), Republic of Korea Patent Publication No. 10-2007-0064444 (hereinafter referred to as 'Patent Document 3'), Republic of Korea Patent No. 10-1305394 (hereinafter referred to as 'Patent Document 4') and Korea It is disclosed in the registered patent No. 10-1305395 (hereinafter referred to as 'Patent Document 5').

The bicylinder pump is composed of a transmission unit and an operation unit largely for pumping fluid.

The shifting unit is configured such that a pair of crank-type first and second eccentric shafts, which are driven at a constant speed and a constant speed angular velocity, are transferred from the prime mover through a power transmission system formed by combining a concentric and an eccentric gear.

The operation unit is connected to one side of the shifting unit and is provided with an inlet and a discharge port on both sides, and is eccentrically installed on the first and second cylinders which are divided up and down and connected to through holes by using a center and first and second eccentric shafts. The distance between the shafts is maintained by the constant velocity and the inconstant angular velocity, and the volume of each cylinder division space divided by the swing piston is connected to the swing movement of the swing piston. As a result, the fluid is pumped by performing the suction and discharge of the two cylinders in an opposite and continuous manner while repeating the contraction and expansion alternately.

In such a bi-cylinder pump, the angular velocity change according to the rotational angle for maintaining the axial distance of the heads, which is the driving condition during the pivoting motion of the swing piston, that is, the kinematic distance between the first and second eccentric shafts in the opposite direction is the maximum kinematically. Alternatively, the minimum inequality is inevitably caused by the constant speed and inconstant angular velocity driving to compensate for the variable interaxial distance in the short and long periods to maintain constant equidistance to achieve the desired pumping operation.

Furthermore, one end of the crank-type first and second eccentric shafts is directly connected to the shifting unit and the other end is eccentrically coupled to be integrally connected with the swinging pistons in each cylinder, wherein the swinging pistons are pivoted. The second eccentric shaft is supported by a bi-cylinder pump housing and a bearing between the transmission unit and the cylinder, and is provided in a portion adjacent to the cylinder so as to be kept airtight by an airtight member such as a mechanical seal.

[Preceding technical literature]

(Patent Document 1) Republic of Korea Patent Publication No. 10-1997-0009955

(Patent Document 2) Korean Utility Model Registration No. 20-0327567

(Patent Document 3) Republic of Korea Patent Publication No. 10-2007-0064444

(Patent Document 4) Republic of Korea Patent No. 10-1305394

(Patent Document 5) Korean Patent Registration No. 10-1305395

However, Patent Documents 1 to 5 disclose that as the rocking piston is rotated and oscillated by the crank-shaped first and second eccentric shafts to rotate, the portion supported by the bearing is not worn, but also the airtight member is damaged. There was a problem that the fluid inside the leak. This in turn acts as a cause of damaging or breaking the bicylinder pump in a short time.

In addition, when the first and second eccentric shafts are to be replaced, there is a significant inefficiency that requires repair or replacement in the state in which the entire bicylinder pump is disassembled while the bicylinder pump is stopped.

The main object of the present invention for solving the conventional problems as described above is to prevent the leakage of the wear and fluid due to the eccentric rotation and pivoting movement of each oscillation shaft, as well as to make replacement or repair simple and convenient It is to provide a bicylinder pump.

It is another object of the present invention to ensure that a part of each swing shaft located in the cylinder can also have high airtightness.

Still another object of the present invention is to increase the width of the turning motion and to allow the eccentric rotation and the turning motion to be stably made without a balance deviation.

The present invention for solving the above technical problem is composed of a transmission unit and the operation unit is a bi-cylinder pump for pumping fluid, so as to be exposed to the outside of the pump body up and down of the pump body between the transmission unit and the operation unit. Each exposed space formed; Respective eccentric members connected to the transmission unit in each of the exposure spaces so as to be eccentrically rotatable; One end is mounted to the swing shaft bearing housing that is spherically coupled to each of the eccentric members, the other side is supported by a spherical bearing housing mounted on one side of the operating unit and then connected to each piston support provided in the cylinder of the operating unit to connect the piston It includes; each rocking shaft is provided to pivot the movement.

The eccentric member includes an eccentric main body axially coupled to the gear of the transmission unit, and a fixing cover to be mounted to the oscillating shaft bearing housing spherically coupled by bolting to the eccentric main body.

One end of each oscillation shaft is supported and fixed by a bearing so as to be rotatable inside each oscillation shaft bearing housing.

The support of each spherical bearing housing and each oscillation shaft is supported by each spherical bearing provided inside each of the spherical bearing housings, so that each oscillation shaft can be an eccentric rotation and a pivoting movement.

The end of each of the piston support and the swing shaft is connected by a spherical bearing, is provided to be sealed by a piston bushing and a bushing cap for preventing the inflow of fluid to the outside, the swing shaft between the piston bushing and the spherical bearing housing It is provided with a blocking member for airtightness.

Each of the eccentric members has a heavier weight on the lower side than on the upper side.

The present invention prevents the leakage of fluid and wear due to the eccentric rotation and pivoting movement of each oscillation shaft, so that replacement or repair can be made simply and conveniently, as well as assembly and maintenance is a short time without cumbersome or inconvenient Along with the effect that can be made quickly in the product has the effect of further increasing the reliability of the product.

In addition, part of each swing shaft located in the cylinder can also have a high airtightness, thereby preventing the swing shaft from being damaged and ensuring a long service life.

In addition, by increasing the width of the swing movement, the eccentric rotation and the swing movement can be made stable without balance deviation, and the pumping of the fluid due to the high pumping efficiency can be made more smoothly, as well as the vibration is minimized, so that the pumping is stable. In addition to this, there is an effect to minimize damage or breakage of the pump.

1 is a front cross-sectional view for explaining the present invention,

2 is a side cross-sectional view for explaining the piston in the cylinder according to FIG.

Figure 3 is a front sectional view for explaining the eccentric rotation and the turning motion of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in more detail with reference to the accompanying drawings. The present invention is not limited or limited by the embodiments.

Figure 1 is a front sectional view for explaining the present invention, Figure 2 is a side sectional view for explaining the piston in the cylinder according to Figure 1, Figure 3 is a front sectional view for explaining the eccentric rotation and the turning motion of the present invention.

As shown therein is disclosed a bi-cylinder pump 100 composed of a conventional transmission unit 110 and the operation unit 120 to pump the fluid.

The transmission unit 110 transmits power at a suitable transmission ratio by combining a main shaft receiving a driving force from the prime mover or the outside to the body in various forms such as a plurality of reduction gears, a support shaft, and an eccentric gear based on the main shaft. This is in well-known patent documents 1-5, and detailed description is abbreviate | omitted.

The present invention provides a simple and convenient replacement and repair as well as preventing erosion and leakage of fluid due to eccentric rotation and rotation of each swing shaft.

Bicylinder pump 100 according to the present invention is formed so as to be exposed to the pump body 102 outside the upper and lower pump body 102 of the bicylinder pump 100 between the transmission unit 110 and the operation unit 120. And each exposed space (S) is formed to facilitate replacement or maintenance of the swing shaft to be described later; Each of the eccentric members 10 connected to the shifting unit 110 and the conventional shaft coupling method in each of the exposure spaces S so as to be eccentrically rotatable; One end is mounted to the oscillating shaft bearing housing 21 which is conventionally spherically coupled to each of the eccentric members 10, and the other side thereof is supported by the spherical bearing housing 28 mounted on one surface of the operation unit 120. It includes; each of the swing shaft 20 is connected to each of the piston support 124 provided in the cylinder 122 of the operating unit 120 is provided to pivot the piston 125.

The main technical idea of the present invention is that one end of each swing shaft is not directly connected to each gear of the transmission unit as in the related art, but is connected so that eccentric rotation can be made by an eccentric member connected to each gear of the transmission unit.

In addition, the oscillating shaft pivots each piston support and the piston in the cylinder while the one end is eccentrically rotated by the eccentric member, the other end is configured to pivot based on the intermediate spherical bearing housing. That is, the oscillating shaft is rotated in the same shape as the lever with the other end rotated eccentrically from the spherical bearing housing.

Accordingly, in the present invention, as in all conventional twin-cylinder pumps, a phenomenon such as uneven wear due to vibration or shock caused by the oscillation piston connected by one eccentric shaft from the transmission unit to the operation unit does not occur.

In addition, the present invention also improved the sealing of the operating unit and the problem that the airtight member such as mechanical sealing on the rocking piston is damaged by the rotation and vibration as in the prior art, the spherical bearing in the portion to be inserted into the operating unit as will be described later The leakage of fluid by the housing and the plurality of O-rings and blocking members also has the advantage of being able to prevent the source.

And, above all, the swing shaft has a stable eccentric rotation and swing movement starting from the spherical bearing housing, and significantly reduces the vibration as compared to the swing piston that performs the eccentric rotation and swing movement by a single eccentric shaft. Pumping can be done. Therefore, it also has the advantage that it can further increase the pumping efficiency of the fluid.

In addition, as one end of the swing shaft is exposed to the exposed space formed in the housing has an advantage that the assembly or installation can be easily performed.

In addition, even when replacement of the oscillation shaft is required, it is possible to easily separate the oscillation shaft within a short time by separating only the spherical bearing housing mounted on the operation unit together with disassembling the fixing cover of the eccentric body. This can also solve the cumbersome and inconvenient disadvantage of disassembling the entire conventional bicylinder pump.

The eccentric member 10 is fixed to each eccentric body 12 which is axially coupled to the gear of the transmission unit 110, and the oscillating shaft bearing housing 21 is spherically coupled to the eccentric body 12 by bolting. Cover 14.

In addition, one end of each swing shaft 20 is supported and fixed by a bearing so as to be rotatable inside the swing shaft bearing housing 21.

Accordingly, the eccentric member is configured such that the gear is mounted at one end so that the eccentric rotation can be achieved by engaging with each gear of the shifting unit. In this case, the eccentric rotation of the eccentric body of the eccentric member has more weight on the lower side from the center line. The oscillating shaft bearing housing, which is formed to be large and mounted to the eccentric body, may also be eccentrically rotated as it is mounted below and not the same position of the center line of the eccentric body.

In addition, the support of each spherical bearing housing 28 and each oscillation shaft 20 is supported by each spherical bearing 27 provided in each of the spherical bearing housing 28 so that each oscillation shaft 20 It is the starting point for eccentric rotation and turning movement. That is, as the starting point of the spherical bearing, one end of each oscillation shaft is eccentric rotation and the other side is smoothly rotated, as in the principle of seesaw.

On the other hand, the end of each of the piston support 124 and the swing shaft 20 is connected by a spherical bearing 24 so as to smoothly rotate while having a minimum friction force, the piston for preventing the inflow of fluid to the outside It is provided to be closed by the bushing 25 and the bushing cap 25a. Further, a blocking member 26 for airtightness is provided on the swing shaft 20 between the piston bushing 25 and the spherical bearing housing 28. The blocking member may be formed in a bellows shape as shown to prevent contact with the fluid as well as hermetic. In addition, although not shown, the blocking member may be combined with a known O-ring or lip seal between the piston bushing and the spherical bearing housing and the spherical bearing to maintain airtightness.

In addition, the outer surface and the piston inner diameter portion of the piston support is formed with a convex protrusion and a concave-convex groove corresponding to each other, it can be tightly fixed without fluidity when the piston support is coupled to the piston.

Accordingly, the end of the swing shaft in the cylinder is also sealed without contact with the fluid, thereby ensuring a long service life and having high reliability.

In addition, the oscillation shafts 20 are disposed to be inclined upwardly from the eccentric member 10 side to the cylinder 122 side so as to increase the width of the turning motion in the cylinder 122. That is, when the pivot shaft is eccentrically rotated in the eccentric member, the piston support coupled to the other end from the swing shaft bearing housing may have a turning width corresponding to the inclined angle, thereby further increasing pumping efficiency.

In other words, when the swing shaft is installed on the horizontal line, the piston support pivots only by the eccentric diameter of the eccentric member, but as the swing shaft is inclined, the pivot shaft moves to a radius as wide as the inclined slope from the spherical bearing housing. Will be done. This, in turn, can increase the pumping efficiency, thereby having a condition that can also increase the pumping efficiency of the fluid.

In addition, each of the eccentric members 10 has a heavier weight on the lower side than the upper side. That is, the oscillation shaft, one end of which is coupled to the eccentric member and rotates, is eccentrically rotated from the spherical bearing housing, and the other side is eccentric rotation and pivoting as the top dead centers are located at opposite positions in the process of pivoting the piston support in the cylinder. This is to ensure that the exercise is stable.

In other words, when one end of the rocking shaft coupled to the eccentric member is located at the lower portion, the other end of the rocking shaft is located at the upper portion, and when one end of the rocking shaft is positioned at the lower portion, the other ends of the rocking shaft are mutually opposite to each other. Eccentric rotation and pivoting movements are made to position.

Accordingly, by having the lower side of the eccentric member having a heavier weight than the upper side, by positioning each center of gravity to the opposite position to each other, the eccentric rotation and swinging movement in the swing shaft can be made stable without fluidity.

This, in turn, acts as one of the important factors to minimize the overall vibration of the bi-cylinder pump as the eccentric rotation and turning movement is stable.

Claims

A bicylinder pump composed of a transmission unit and an operation unit for pumping fluid,

Exposure spaces formed to be exposed to the outside of the pump body above and below the pump body between the transmission unit and the operation unit;

Respective eccentric members connected to the transmission unit in each of the exposure spaces so as to be eccentrically rotatable;

One end is mounted to a swing shaft bearing housing that is spherically coupled to each of the eccentric members, and the other side is supported by a spherical bearing housing mounted on one surface of the operation unit, and then connected to each piston support provided in the cylinder of the operation unit to connect the piston. A bicylinder pump comprising: each oscillation shaft provided to pivot.
The method of claim 1,

The eccentric member is a bicylinder pump, characterized in that it comprises a eccentric body coupled to the gear of the shifting unit, and a fixed cover which is mounted so that the swing shaft bearing housing is spherically coupled by bolting to the eccentric body.
The method of claim 2,

One end of each of the oscillation shaft is a bi-cylinder pump, characterized in that the support is fixed by the bearing rotatably inside the oscillation shaft bearing housing.
The method of claim 2,

The support of each spherical bearing housing and each oscillation shaft is supported by each spherical bearing provided in each of the spherical bearing housings so that each oscillation shaft is an starting point for eccentric rotation and turning motion. Cylindrical pump.
The method of claim 2,

The end of each of the piston support and the swing shaft is connected by a spherical bearing, is provided to be sealed by a piston bushing and a bushing cap for preventing the inflow of fluid to the outside, the swing shaft between the piston bushing and the spherical bearing housing The bicylinder pump, characterized in that for providing a blocking member for airtight.
The method according to any one of claims 1 to 5,

Wherein each of the eccentric members has a heavier weight on the lower side than on the upper side.