KR20200040035A - Air pump equipped with diaphragm - Google Patents

Abstract

The present invention relates to a fuel booster blower. More specifically, the present invention relates to the fuel booster blower comprising a non-metal diaphragm to change the pressure in a pumping chamber to sequentially open and close check valves of an intake chamber and an exhaust chamber shielded from each other to suction gas and then discharge the gas. The fuel booster blower further comprises: a chamber housing including the pumping chamber, the intake chamber, and the exhaust chamber; a motor housing coupled to the chamber housing; a non-metal diaphragm arranged between the chamber housing and the motor housing; and an operating means embedded in the motor housing to elastically deform the non-metal diaphragm. The operating means includes: a motor; a piston allowing the non-metal diaphragm to be connected to one end thereof, and having a circular cam mounting hole arranged on the other end thereof; a first bearing disk mounted on the cam mounting hole; and an eccentric cam including a cam unit inserted and coupled to the first bearing disk, and a shaft hole formed at an eccentric position from the center of the cam unit to one side to couple a drive shaft rotating by the motor thereto to change the torque of the motor into a straight reciprocating motion of the piston. Noise and vibration created when operating the motor can be reduced.

Description

Fuel booster blower {AIR PUMP EQUIPPED WITH DIAPHRAGM}

The present invention relates to a fuel-boosting blower, and more specifically, to change the pressure in the pumping chamber, and includes a non-metallic diaphragm that sequentially opens and closes each check valve of the intake chamber and the exhaust chamber, which are shielded from each other, to intake and discharge the gas. A fuel boosting blower comprising: a chamber housing including the pumping chamber, an intake chamber, and an exhaust chamber; A motor housing coupled to the chamber housing; A non-metallic diaphragm provided between the chamber housing and the motor housing; And operating means embedded in the motor housing to elastically form the non-metallic diaphragm, wherein the operating means comprises: a motor, a piston having the non-metallic diaphragm connected to one end and a circular cam mounting hole at the other end, the cam A motor having a first bearing disc mounted on a mounting hole, a cam portion fitted into and coupled to the first bearing disc, and an axial hole formed at a position biased to one side from the center of the cam portion and coupled to a driving shaft rotated by the motor. It relates to a fuel-boosting blower that can reduce the noise and vibration generated during operation of the motor, including an eccentric cam for converting the rotational force of the piston to the linear reciprocating motion.

There are various types of fuel booster blowers for pumping and supplying gases such as corrosive gases, depending on the type of pumping. Among them, fuel using a diaphragm that changes the pressure in the pumping chamber through volume change to allow exhaust after intake. There is a step-up blower.

The diaphragm is divided into a metal diaphragm made of a superalloy such as a cobalt group or a nickel group, and a non-metal diaphragm made of a general rubber material, depending on the type of gas to be pumped or the use environment.

As a related art, there is Japanese Patent Publication No. 10-2018-0103270.

The disclosed patent can minimize the thickness of the non-metallic diaphragm by changing the pressure in the pumping chamber and inhaling and discharging the gas, while minimizing its thickness. It relates to an air pump having a non-metallic diaphragm with improved durability so as not to occur.

In the prior art, the piston moves up and down through a cam portion that is rotated by a motor to perform a pumping operation of the diaphragm. At this time, a bearing disk is fitted into the cam mounting hole to reduce friction between the cam portion and the piston.

At this time, in the conventional piston, a pair of fixed pieces forming a cam mounting hole is formed of a detachable type, and a bearing disc is inserted between the fixed pieces, and then tightened between the fixed pieces with an adjustment bolt to adjust the size of the cam mounting hole. Have

The prior art has an advantage in that it is easy to assemble the bearing disk by adjusting the width between the fixed pieces. When the fixed pieces are loosened by repeated operation for a long time, the size of the cam mounting hole is widened, so that the bearing disk can be mounted. As it becomes unstable, there is a problem in that noise and vibration are increased due to the clearance between the piston and the bearing disk during operation.

In addition, in the prior art, another bearing disc is fitted into the shaft mounting hole of the housing to reduce friction between the motor housing and the drive shaft. If the difference between the inner diameter of the shaft mounting hole and the inner diameter of the drive shaft is small, assembly of the drive shaft becomes difficult, and on the contrary, the shaft If the difference between the inner diameter of the mounting hole and the outer diameter of the drive shaft is large, there is a problem in that noise and vibration occur as the drive shaft is loosely fixed.

In addition, the prior art has problems such as leakage of gaseous fuel in each chamber to the outside due to the gap between the bolt and each plate, by fastening the plate with bolts on the upper and lower surfaces of the diaphragm so that the diaphragm is firmly assembled on the top of the piston. There is this.

Accordingly, the present invention was devised to solve the problems as described above,

Easy and robust assembly and operation of the bearing disc for reducing friction of the drive shaft and the housing while reducing noise and vibration caused by the bearing disc provided for reducing the friction of the eccentric cam rotating by the piston and the motor operating the diaphragm It relates to a fuel booster blower that can suppress the noise and vibration generated, and can prevent the gas raw material in the chamber from leaking into the gap where the plate head bolt is fastened.

In order to achieve the above object, the fuel booster blower according to the present invention,

In the fuel-boosting blower comprising a non-metallic diaphragm to change the pressure in the pumping chamber, sequentially open and close each check valve of the intake chamber and the exhaust chamber, which are shielded from each other, to intake and discharge the gas,

A chamber housing provided with the pumping chamber, intake chamber, and exhaust chamber;

A motor housing coupled to the chamber housing;

A non-metallic diaphragm provided between the chamber housing and the motor housing; And

Included in the motor housing is an operating means for elastically forming the non-metallic diaphragm;

The operating means includes a motor, a piston having the non-metallic diaphragm connected to one end and a circular cam mounting hole at the other end, a first bearing disk mounted to the cam mounting hole, and a cam part fitted and coupled to the first bearing disk It is characterized in that it comprises an eccentric cam formed in a position biased to one side from the center of the cam portion and provided with an axial hole through which a drive shaft rotated by the motor is coupled to convert the rotational force of the motor into linear reciprocating motion of the piston. .

And in the fuel-boosting blower according to the present invention,

The motor housing includes a motor chamber in which the motor is embedded, a shaft coupling groove formed through a side wall of the motor chamber, and a second bearing disc mounted in the shaft coupling groove and coupled through the drive shaft,

In the state where the shaft engaging groove is expanded by applying heat to the side wall of the motor chamber, the second bearing disc is fixed to the shaft engaging groove by cooling contraction of the shaft engaging groove after the second bearing disc is fitted into the shaft engaging groove. It is characterized by being.

Furthermore, in the fuel-boosting blower according to the present invention,

The piston is superimposed on one surface of the non-metallic diaphragm and has a first plate having a plate head groove, a second plate having a screw hole corresponding to the plate head groove, being coupled to a rod portion of the piston and overlapping the other surface of the non-metal diaphragm. A plate head bolt comprising a plate, a head portion inserted in correspondence with the plate head groove, and a screw portion fastened to the screw hole to couple a non-metallic diaphragm to a piston, and an O-ring interposed between the plate head groove and the head portion It is characterized by.

Fuel booster according to the present invention,

Since the cam mounting hole provided in the piston is formed of an integral structure rather than a conventional detachable structure, noise and vibration caused by the looseness of the first bearing disk can be solved.

The second bearing disk for rolling support of the drive shaft can be assembled more easily and firmly on the shaft mounting hole of the housing,

There is an effect that can prevent the high-temperature, high-pressure gaseous fuel in the chamber from leaking out of the chamber through the gap in which the plate head bolt is fastened.

1 is an external perspective view of a fuel boosting blower according to the present invention.
2 and 3 are cross-sectional views of FIG. 1.
4 and 5 is an assembled perspective view and an exploded perspective view of the piston according to the present invention.
6 is an exploded perspective view of a motor housing and a drive shaft according to the present invention.

The present invention can be applied to a variety of changes and can have a variety of forms, the implementation (態 樣, aspect) (or embodiments) will be described in detail in the text. However, it is not intended to limit the present invention to a specific disclosure form, it should be understood to include all modifications, equivalents, or substitutes included in the spirit and scope of the present invention.

The same reference numbers in each drawing, especially the number of tens and ones, or the same number of tens, ones and alphabets indicate the members having the same or similar functions, and each of the drawings unless otherwise specified. The member indicated by the reference numeral can be understood as a member conforming to these standards.

In addition, in each drawing, the elements are exaggeratedly large (or thick) or smallly (or thinly) or simplified to express the size or thickness in consideration of convenience, etc., thereby limiting the scope of the present invention. It should not be.

The terminology used herein is only used to describe a specific embodiment (sun, 態 樣, aspect) (or embodiment), and is not intended to limit the present invention. Singular expressions include plural expressions unless the context clearly indicates otherwise.

 In this application, terms such as ~ include ~ or ~ consist of ~ are intended to designate the existence of features, numbers, steps, operations, components, parts, or combinations thereof described in the specification, and one or more other features. It should be understood that the existence or addition possibilities of fields or numbers, steps, actions, components, parts or combinations thereof are not excluded in advance.

Unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by a person skilled in the art to which the present invention pertains. Terms such as those defined in a commonly used dictionary should be interpreted as having meanings consistent with meanings in the context of related technologies, and should not be interpreted as ideal or excessively formal meanings unless explicitly defined in the present application. Does not.

~ 1 ~, ~ 2 ~, etc. described in this specification will be referred to only to distinguish that they are different components, and are not limited to the order in which they are manufactured, and the names in the detailed description and claims of the invention It may not match.

In the description of the fuel boosting blower according to the present invention, for convenience, a rough direction standard that is not rigid is specified with reference to FIGS. 2 and 3, and the direction in which gravity acts is determined downward, left, right, and left as it is, In the detailed description and claims of the invention related to other drawings, directions are specified according to this standard unless otherwise specified.

Hereinafter, a fuel boosting blower according to the present invention will be described with reference to the accompanying drawings.

In the present invention, after changing the pressure in the pumping chamber 13, the check valves 15 and 16 of the intake chamber 11 and the exhaust chamber 12, which are shielded from each other, are sequentially opened and closed to intake gas. It relates to a fuel booster blower having a non-metallic diaphragm 30 to discharge,

As shown in Figures 1 to 6, the chamber housing 10 is formed with a flow path for inhaling and discharging gas at high temperature and high pressure, and a motor 21 and a piston 22 for operating the non-metallic diaphragm 30 are provided. It includes a non-metallic diaphragm (30) that forms a pumping pressure in the pumping chamber 13 in conjunction with the operation of the built-in motor housing (20) and piston (22).

In the present specification, gas means all fluids of a gas type that is not liquefied, such as general gas and gaseous fuel in the form of gas. .

In the drawing, the motor 21 is mounted in the center of the main body, and the chamber housing 10 and the motor housing 20 are provided on both sides of the motor 21, respectively.

An embodiment in which two non-metallic diaphragms 30 are simultaneously operated by pistons 22 connected to both ends of the drive shaft 21a through which the drive shaft 21a penetrates and is connected to both sides of the rotor of the single motor 21 is shown. , But is not limited to this.

First, the chamber housing 10 is provided with an intake chamber 11 with an intake port 11a connected to one side, an exhaust chamber 12 with an exhaust port 12a connected to the other side, an intake chamber 11 and an exhaust chamber (12) A pumping chamber 13 is provided on the lower side.

The intake chamber 11 and the exhaust chamber 12 are shielded from each other by a partition wall 11S,

The pumping chamber 13 is provided with shields 14 in upper openings communicating with the intake chamber 11 and the exhaust chamber 12 to be shielded from each other, and non-metal around the lower openings communicating with the motor housing 20. The outer end of the diaphragm 30 is fitted with a fitting portion (13a) is fitted.

In addition, the shield 14 has one or more intake holes 14a communicating the intake chamber 11 and the pumping chamber 13 with each other, and one or more exhaust holes communicating the exhaust chamber 12 with the pumping chamber 13 with each other. 14b is formed, and is provided with a first check valve 15 and a second check valve 16 that open and close the intake hole 14a and the exhaust hole 14b, respectively.

The first and second check valves 15 and 16 direct gas flow in one direction, that is, the first check valve 15 has a gas in the intake chamber 11 toward the pumping chamber 13, and a second check valve ( 16) is to control the gas to flow from the pumping chamber 13 in the direction of the exhaust chamber 12. In the drawing, the first and first are provided with a dome-shaped opening and closing membrane covering the intake hole 14a and the exhaust hole 14b. 2 Check valves 15 and 16 can be checked,

In consideration of the flow direction of the gas, the first check valve 15 is provided so that the opening / closing membrane is disposed in the pumping chamber 13, and the second check valve 16 is provided so that the opening / closing membrane is disposed in the exhaust chamber 12 do.

The present invention of such a configuration,

When the pressure in the pumping chamber 13 decreases by the non-metallic diaphragm 30, the first check valve 15 is deformed and the intake hole 14a is opened while the second check valve 16 is the shield 14 Close to the top surface of the exhaust hole (14b) to close,

Conversely, when the pressure in the pumping chamber 13 is increased by the non-metallic diaphragm 30, the first check valve 15 is in close contact with the lower surface of the shield 14 and closes the intake hole 14a while simultaneously checking the second. As the valve 16 is deformed, the exhaust hole 14b is opened,

The high-temperature, high-pressure gas sucked through the intake port 11a passes through the intake chamber 11, the intake hole 14a, the pumping chamber 13, the exhaust hole 14b, and the exhaust chamber 12 in turn, and then the exhaust port It is discharged to (12a), the pumping action of the gas is made, it is possible to pump the gas boosted.

Of course, since the first and second check valves 15 and 16 are sufficient to control the flow of the gas in one direction, other known types of valves may be used.

And the non-metallic diaphragm 30 is a ring-shaped member that changes the volume of the pumping chamber 13 while its shape is elastically deformed according to the raising and lowering operation of the piston 22, thereby changing the pressure for gas pumping,

The inner end forming the hollow portion is fitted to the mounting portion 23a formed between the first and second plates 23A and 23B, and the outer end is fitted to the fitting portion 13a provided in the lower opening of the pumping chamber 13. It is fitted to keep the pumping chamber 13 in an airtight state.

And when the non-metallic diaphragm 30 is pushed to the outside of the pumping chamber 13 (lower on the drawing) by the reverse (downward drawing) of the piston 22, the volume in the pumping chamber 13 increases, thereby pumping accordingly As the pressure in the chamber 13 decreases, suction pressure is generated in the pumping chamber 13, so that the first check valve 15 is opened and the second check valve 16 is closed, and the gas in the intake chamber 11 is made. After intake into the pumping chamber 13,

When the non-metallic diaphragm 30 is elastically deformed while being pushed into the pumping chamber 13 (upper side of the drawing) by the advancement (upward drawing) of the piston 22, the non-metallic diaphragm 30 of the piston 22 is shielded As the volume in the pumping chamber 13 decreases as it comes into close contact in the direction (14), the pressure in the pumping chamber 13 rises, and the first check valve 15 is closed and eliminated by the discharge pressure of the pumping chamber 13. 2 The check valve 16 is opened to discharge the gas in the pumping chamber 13 into the exhaust chamber 12.

Subsequently, the motor housing 20 is provided with an operation means for elastically deforming the non-metallic diaphragm 30 as described above.

Motor (21),

The non-metallic diaphragm 30 is connected to one end, and the piston 22 having a circular cam mounting hole 22H at the other end,

A first bearing disc 25 mounted on the cam mounting hole 22H, a cam portion 26A fitted to and coupled to the first bearing disc 25, and formed at a position biased toward one side from the center of the cam portion 26A And an eccentric cam 26 having a shaft hole 26a to which a drive shaft 21a rotated by the motor 21 is coupled to convert the rotational force of the motor 21 into a linear reciprocating motion of the piston.

BLDC motor or the like may be used as the motor 21, and when the power is supplied, the driving shaft 21a is rotated at a high speed in one direction.

The piston 22 is bolted in a form in which the first plate 23A and the second plate 23B are stacked on one end (top of the drawing) of the rod portion 22A, and thus the first and second plates 23A Between the (23B) to form a mounting portion (23a) is fitted with a non-metallic diaphragm (30), to maintain the pumping chamber 13 in an airtight state,

A cam mounting hole 22H penetrating both sides of the left and right sides is provided at the head portion 23B connected to the other end (lower side of the drawing) of the rod portion 22A,

A first bearing disc 25 is mounted on the cam mounting hole 22H, and the cam portion 26A of the eccentric cam 26, to which the drive shaft 21a is coupled, is fitted to the first bearing disc 25, and the motor ( 21) Reduces the frictional force generated by the cam portion 26A during operation.

The cam mounting hole 22H is formed by a first inserting portion 22a on one side and a first locking portion 22b on the other side having an inner diameter smaller than that of the first inserting portion 22a. ) Is inserted into the first insertion portion 22a and caught in the first locking portion 22b and mounted on the cam mounting hole 22H.

At this time, both the piston 22 and the first bearing disk 25 are made of a metal material, and the first bearing disk 25 is fixed by being fitted into the cam mounting hole 22H.

When the head portion 23B of the piston 22 provided with the cam mounting hole 22H is made of an integral structure rather than a separate type, the fixing of the first bearing disk 25 fitted in the cam mounting hole 22H is stably As it is maintained, it is possible to reduce noise or vibration generated in the operation line of the motor 21.

As the bearing disk used in the present invention, various types of known bearings such as a ball bearing or a bush type bearing made of a material capable of reducing the friction coefficient of the disk itself may be used.

The eccentric cam 26 is based on the center of the shaft hole (26a), the distance to one side of the outer end and the distance to the other side of the outer end, the wide portion (26L) and the other narrow portion (26S) formed differently from each other By having,

The cam portion 26A rotates in one direction about the drive shaft 21a, that is, the central portion of the shaft hole 26a,

When the wide portion 26L rotates and moves in the direction of the pumping chamber 13, the piston 22 advances to elastically deform the non-metallic diaphragm 30 by pushing it inside the pumping chamber 13,

When the narrow portion 26S rotates in the direction of the pumping chamber 13, the piston 22 reverses and elastically deforms the non-metallic diaphragm 30 outside the pumping chamber 13, thereby generating the pumping pressure as described above. do.

That is, when the cam portion 26A rotates in the clockwise direction by the drive shaft 21a, the piston 22 descends while the wide portion 26L rotates downwardly toward the outside of the pumping chamber 13, thereby causing the first, As the non-metallic diaphragm 30 is elastically deformed downward by the downward movement of the second plates 23A and 23B, suction pressure is generated in the pumping chamber 13, and only the first check valve 15 is opened while the pumping chamber 13 ) Inhale the gas in the intake chamber (11),

In this state, if the cam portion 26A continues to rotate in the clockwise direction, the piston 22 rises while the wide portion 26L moves upwards and rotates inside the pumping chamber 13, so that the first and second plates 23A ( When the non-metallic diaphragm 30 is elastically deformed upward by the rise of 23B), discharge pressure is generated in the pumping chamber 13, and only the second check valve 16 is opened while gas in the pumping chamber 13 is exhausted ( 12),

When the rotation of the drive shaft 21a by the motor 21 continues at high speed in this way, the eccentric cam 26 generates a pumping pressure required for intake and exhaust while the piston 22 linearly reciprocates and pumps gas. To supply.

In the eccentric cam 26, the nut 26b is fastened and fixed to the drive shaft 21a fitted in the shaft hole 26a, and in the drawing, the eccentric cam 26 is coupled to the drive shaft 21a directly connected to the motor 21. Although it is illustrated, it is also possible that the eccentric cam 26 is coupled to a driven shaft interlocking with the drive shaft 21a through various shafts and / or gears.

Meanwhile, the motor housing 20 includes a motor chamber 20S in which the motor 21 is built, a shaft coupling groove 20H formed through a side wall 20A of the motor chamber 20S, and the shaft coupling groove 20H ) And includes a second bearing disk 28 through which the drive shaft 21a is coupled.

In the state in which the shaft coupling groove 20H is expanded by applying heat to the side wall 20A of the motor chamber 20S, the shaft bearing groove is inserted after the second bearing disk 28 is inserted into the shaft coupling groove 20H. The second bearing disk 28 is fixed to the shaft coupling groove 20H by the cooling contraction of 20H.

That is, the second bearing disk 28 made of metal and the motor housing 20 made of plastic synthetic resin material have a large processing error due to characteristics of other materials, and the second bearing disk 28 when the processing error is large. Is difficult to fit into the shaft coupling groove (20H), or the second bearing disk 28 can be loosely fixed after installation,

The present invention facilitates the mounting of the second bearing disk 28 through the heating expansion of the shaft engaging groove 20H, and secures the fixing of the second bearing disk 28 through cooling contraction of the shaft engaging groove 20H. The second bearing disk 28 is fixed by aligning the inner diameter of the shaft coupling groove 20H with the outer diameter of the second bearing disk 28 through cooling contraction, and thus vibration generated during the operation of the motor 21 It is possible to reduce the occurrence of noise.

The shaft engaging groove 20H is formed by one side of the second inserting portion 20a and the other side of the second locking portion 20b having an inner diameter smaller than that of the second inserting portion 20a, the second bearing disc 28 ) Is inserted into the second insertion portion 20a and caught in the second locking portion 20b to be mounted in the shaft coupling groove 20H.

In addition, the piston 22 is superimposed on one surface (upper surface in the figure) of the non-metallic diaphragm 30 and is provided on a first plate 23A having a plate head groove 23c and a rod portion 22A of the piston 22 Second plate (23B), the plate head groove (23c) having a screw hole (24d) corresponding to the plate head groove (23c) overlapping the other surface of the non-metal diaphragm (30) A countersunk head bolt (24) consisting of a head section (24a) inserted correspondingly and a thread section (24b) fastened to the screw hole (24d) to couple the non-metallic diaphragm (30) to the piston (22), the countersunk head groove And an O-ring 24R interposed between 23c and the head portion 24a.

The second plate 23B is bolted and connected to the upper end of the rod portion 22A, and the diaphragm 30 and the first plate 23A are sequentially stacked on the upper surface of the second plate 23B to form the first plate. The diaphragm 30 is mounted on the piston 22 while the 23A and countersunk head bolts 24 penetrating the diaphragm 30 are fastened to the second plate 23B.

The first and second plates 23A and 23B have screw holes having a diameter corresponding to each other on the same line of the upper and lower sides, and the first plate 23A has a shape in which the inner diameter increases as it goes upward from the top of the screw hole. The plate head groove 23c is connected.

The plate head bolt 24 has a head portion 24a having a conical shape corresponding to the plate head groove 23c, and when the screw hole 24d is fastened, the head portion 24a has a plate head groove 23c It is completely inserted inside and does not protrude.

Conventionally, as the first and second plates 23A, 23B and the diaphragm 30 are simply bolted, there is a problem in that high-temperature, high-pressure gas leaks out through the gap between the bolt and the screw hole during the pumping operation. .

Accordingly, the present invention solves the above-mentioned problem by sealing the gap between the bolt holes by inserting a rubber or silicone O-ring (24R) between the head portion (24a) and the plate head groove (23c) of the plate head bolt (24). .

At this time, the second plate (23B) is formed as a curved portion (23b) inclined downward to the opposite side (top and bottom of the drawing) of the pumping chamber 13 as the upper surface goes to the outer end, the second plate (23B) pumping chamber ( 13) When advancing inward, the curved portion 23b presses the lower surface of the non-metallic diaphragm 30 at an appropriate angle, and the non-metallic diaphragm 30 is easily elastically deformed while maintaining the airtightness of the pumping chamber 13.

On the other hand, the eccentric cam 26, to increase the centrifugal force, includes a weight member 27 provided at a position biased to one side from the center of the shaft hole 26a.

The weight member 27 is a member having a heavier weight than a certain level, and increases the centrifugal force when the eccentric cam 26 rotates, so that the rotational force of the eccentric cam 26 is independent of the output of the motor 21, that is, the piston ( 22) to improve the linear reciprocating pressure.

The weight member 27 is not limited in its type or shape, and in the drawing, the nut-shaped weight member 27 is bolted to the extension portion 26B connected to one side protruding from the center of the eccentric cam 26. It can be confirmed that is coupled by.

At this time, the protruding direction of the extension portion 26B is formed to extend in the same direction in which the shaft hole 26a is biased in the eccentric cam 26, and the weight member 27 is coupled to the outer end of the extension portion 26B. .

That is, based on the center of the shaft hole 26a, the extension portion 26B is long connected in the direction in which the narrow portion 26S is formed, and the weight member 27 is disposed on the opposite side of the wide portion 26L.

When the weight member 27 is arranged on the opposite side of the wide portion 26L in this way, when the motor 21 is stopped, the weight member 27 faces downward by gravity (ie, the wide portion 26L faces upward). ), Since the eccentric cam 26 is stopped, the non-metallic diaphragm 30 is elastically deformed upward and the operation of the fuel boosting blower is stopped.

Therefore, as all of the gas in the pumping chamber 13 is discharged, both the first and second check valves 15 and 16 are kept closed, and when the motor 21 is restarted, the intake action described above is performed. By immediately occurring, it becomes possible to improve the control accuracy or reactivity of the fuel boost blower.

In addition, when the weight member 27 is arranged on the opposite side of the wide portion 26L, when the gas in the pumping chamber 13 is discharged into the exhaust chamber 12, that is, when the piston 22 is raised, As gravity is added to the weight member 27 that rotates downward, the centrifugal force becomes larger, thereby offsetting the resistance generated by the high temperature and high pressure gas pressure inhaled into the pumping chamber 13, thereby overloading the motor 21. It can be prevented from occurring.

In the above description, the fuel boosting blower has been mainly described with reference to the accompanying drawings, but the present invention is capable of various modifications, changes and substitutions by those skilled in the art, and such modifications, changes and substitutions are within the protection scope of the present invention. It should be interpreted as belonging.

10: chamber housing 11: intake chamber
12: exhaust chamber 13: pumping chamber
14: shield 15, 16: check valve
20: motor housing 21: motor
21a: drive shaft 22: piston
23A, 23B: Plate 24: Plate head bolt
25: first bearing disc 26: eccentric cam
27: weight member 28: second bearing disc
30: non-metal diaphragm

Claims (3)

In the fuel-boosting blower comprising a non-metallic diaphragm to change the pressure in the pumping chamber, sequentially open and close each check valve of the intake chamber and the exhaust chamber, which are shielded from each other, to intake and discharge the gas,
A chamber housing provided with the pumping chamber, intake chamber, and exhaust chamber;
A motor housing coupled to the chamber housing;
A non-metallic diaphragm provided between the chamber housing and the motor housing; And
Included in the motor housing is an operating means for elastically forming the non-metallic diaphragm;

The operating means includes a motor, a piston having a non-metal diaphragm connected to one end and a circular cam mounting hole at the other end, a first bearing disk mounted to the cam mounting hole, and a cam part fitted and coupled to the first bearing disk And an eccentric cam formed at a position biased toward one side from the center of the cam portion and provided with an axial hole through which a drive shaft rotated by the motor is coupled to convert the rotational force of the motor into linear reciprocating motion of the piston. Fuel booster blower.
According to claim 1,
The motor housing includes a motor chamber in which the motor is built, a shaft coupling groove formed through a side wall of the motor chamber, and a second bearing disc mounted in the shaft coupling groove and coupled through the drive shaft,
In the state where the shaft coupling groove is expanded by applying heat to the side wall of the motor chamber, the second bearing disc is fixed to the shaft coupling groove by cooling contraction of the shaft coupling groove after the second bearing disc is fitted into the shaft coupling groove. A fuel booster blower characterized in that it becomes.
The method of claim 1 or 2,
The piston is superimposed on one surface of the non-metallic diaphragm and has a first plate having a plate head groove, a second plate having a screw hole corresponding to the plate head groove and being coupled to a rod portion of the piston and overlapping the other surface of the non-metal diaphragm. A plate head bolt comprising a plate, a head portion inserted in correspondence with the plate head groove, and a screw portion fastened to the screw hole to couple a non-metal diaphragm to a piston, and an O-ring interposed between the plate head groove and the head portion Fuel booster blower, characterized in that.

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