JPS58110876A - Hydraulic diaphragm pump - Google Patents

Abstract

PURPOSE:To obtain efficient pump operation by a method wherein a piston is reciprocated by the rotation of a driving shaft through an eccentric cam to send oil in a main pump chamber forcibly into a sub pump chamber and discharge liquid by operating the diaphragm in the chamber. CONSTITUTION:When the eccentric cam 4 is rotated by rotating the driving shaft 3 by a motor or the like, the piston 5 is reciprocated and the oil in the main pump chamber 2 is sucked into a piston hole 14 through a communicating hole 9 and a sucking recessed arced groove 8 upon descending of the piston 5. Upon the ascending of the piston 5, the oil, increased in the hydraulic pressure thereof by closing the communicating hole 9 with the outer surface of the eccentric cam 4, where the recessed arced groove 8 is not existing, is sent into the lower surface of the diaphragm 13 forcibly through a bridge path 15. According to this operation, the diaphragm 13 is inflated upwardly and the working fluid, being sucked into the sub pump chamber 12 upon a previous stroke, is discharged through a non-return valve 40 and a connecting path 19 for discharging.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a hydraulic diaphragm pump that can reliably and effectively suck and discharge corrugated materials such as water, heavy oil, and chemicals. For reference, its configuration is detailed as follows.

A drive shaft (3) is rotatably installed in the main pump chamber (2) of the main pump body (1) in which drive oil is enclosed, and an eccentric cam (4) is mounted on the outer peripheral surface of the drive shaft (3). , and at least one piston (5) in the main pump body (II) v
, a shoe (6) is disposed slidably in the radial direction of the drive shaft (3), and a shoe (6) is interposed between the mackerel part of the piston (5) and the cam outer peripheral surface of the eccentric cam (4); The piston (5) is pressed against the cam outer circumferential surface of the eccentric cam (4) by the compression spring (7) via the shoe (6), and the cam outer circumferential surface of the eccentric cam (4) is pressed against the cam outer circumferential surface of the eccentric cam (4). A groove (8) is formed in approximately half of the outer peripheral surface of the cam, and a communication hole (9) is formed in the center of the V knee (6), and a communication hole α is formed in the center of the piston (5).
On the other hand, attach the sub-pump body αυ to the main pump body (1), and attach the sub-pump ll of the sub-pump body I!
A diaphragm 0 is partitioned inside (2), and II * jlf! is placed between the primary side of the diaphragm (2) and the piston hole axis of the piston (5). QS is formed and communicated with the secondary part of the diaphragm 0 to form a suction check valve part! a suction passage aη and a discharge passage a1 having a discharge check valve portion;
and are formed on the sub-pump main body I, respectively.This will be explained in more detail.

The main pump body (1) in this figure is formed of two members, and is fixed approximately at the center of the drive shaft (3) by an eccentric cam (4) with the V key (to). The drive shaft (3) is rotatably mounted with a bearing υ so as to sandwich the
and sealing the main pump chamber (2) with an oil seal (2),
The main pump body (13) has a motor (
(not shown) etc. to rotate the drive shaft (3).The main pump chamber (2
), and an oil tank (c) is attached.

Further, the shoe (6) is in sliding contact with the outer peripheral surface of the eccentric cam (4), and has a concave arc shape ms on the eccentric cam (4) side of the shoe (6).
A grating oil groove (C) is formed in the face hook in a lattice pattern, and an elliptical balance groove (C) is formed in communication with the communication hole (9), while the piston (5) of the ν knee (6) ) side,
Concave ball receiving surface (2) that receives the ball part of the piston (5)
A balanced concave spherical groove (to) is formed at the top of the spherical head of the screw (5), and horse oil*cn is formed at the periphery, which is sucked from inside the main pump II (2). When the oil introduced through the concave arch (8) is discharged as pressure oil from the through hole (9) to the piston hole a4 through the circulation hole, the shoe (6) and the eccentric cam ( 4) The surface pressure with the outer peripheral surface of the cam is controlled by the balance concave IB@ due to the pressure oil,
An overpressure balance is obtained, and the surface pressure at the sliding contact between the cylinder (6) and the piston (5) is also controlled by the balance concave spherical groove (to) due to the pressure oil, An overpressure cover 1 lance is obtained, and wear on the surface of the shoe (6) is significantly alleviated, the life and durability of the shoe (6) are increased, and the drive shaft (3 ) rotation and piston (5)
・In addition, there are several ring oil grooves 6 on the outer circumferential surface of 1 screw (5).
11 is formed.

Further, the sub-pump main body I is threadedly connected to the main pump main body (1), and the sub-pump main body aυ is formed of two members.

A guide rod (to) that guides the pressing spring (7) that presses against the piston (5) and the knee (6) is vertically installed at the lower part;
On the upper surface of the lower member of the sub pump main body I is the diaphragm as.
is placed, and the upper member of the sub-pump main body al is screwed onto the lower member, and the outer circumference of diaphragm 0 is fitted and fixed with the upper member, and then it is attached to the upper surface of diaphragm I by the return spring. The energized return bottle -V is brought into contact with the diaphragm 11, and the diaphragm 11 is caused to contract in one small movement.

In addition, the suction check valve ■ is the valve body (to), the float (to)
.

The suction connection part (2) is formed at the base, and the discharge check valve part consists of the valve body (to), a spring (2), and the discharge connection part (2) is formed at the base. A joint battle is being formed.

Note that this is not limited to this embodiment, and in particular, the number of pistons (5), balance concave grooves (2), and balance concave ball #1
The shape of I(2) is made into a membrane chamber.

Since the zero starting proboscis is configured as described above, when the drive shaft (8) is rotated by a motor or the like, the eccentric cam (4) rotates, and one rotation of the -centered cam (4) causes the eccentric cam (4) to rotate. ) of −
The piston (5) reciprocates with a stroke twice the position m, and during the half rotation of the eccentric cam (4), the piston (5) is lowered by the compression spring (7), causing the through hole to move downward. (9) is sucked into the piston hole No. A through the communication hole, and during the next half rotation of the eccentric cam (4), the piston (5) is raised by the cam outer circumferential surface of the eccentric cam (4). Sometimes, the movement hole (9) is blocked by the cam outer circumferential surface of the eccentric cam (4) without the suction concave arc groove (8), and the flow inside the piston hole a◆ is stopped, and the piston (5) rises. The nuclear oil becomes pressurized oil and is discharged into the crossroads 4.
The pressure oil causes the diaphragm a to expand, and when the piston (5) descends again, the chain pressure oil is returned to the main pump ring (2), or the pressure of the pressure oil disappears, and the return spring ( ), the diaphragm shaft returns to its original state, and this operation is repeated every rotation of the drive shaft (8) to cause the diaphragm shaft to expand and contract, and by this expansion and contraction movement of the diaphragm shaft, A pumping action occurs on the secondary side of the diaphragm 0, that is, a pumping action is performed in which the working fluid is discharged in a pulsating manner from the suction passageway a71 to the discharge connection passageway a9. ) is rotated, and by the action of the eccentric cam (4), the piston (6)! The reciprocating movement of the piston (6) causes the oil in the main pump ring (2) to be discharged from the primary side of the diaphragm, and the expansion and contraction movement of the diaphragm shaft causes the oil in the main pump ring (2) to be discharged from the secondary side of the diaphragm shaft. The pump action is mainly caused, and the working liquid is discharged in a pulsating manner from the suction slow connection path fin to the discharge connection path 0, and the working liquid is reliably and neatly discharged, making it an effective pump. In particular, since the diaphragm shaft is caused to expand and contract by the driving oil (a), an extremely high-pressure pumping action can be obtained, and the pumping action by the expanding and contracting movement of the diaphragm α1 Because of this, it operates reliably even with water, heavy oil, and other liquids with poor lubricity.There are no parts that are worn out at all, so there are no wear or breakage accidents.In addition, the primary side of diaphragm I is free of driving oil ( Depending on the gradient, diaphragm I
Since the pressure on the diaphragm surface on the secondary side of the diaphragm I is balanced by the working fluid, there is no damage or wear on the diaphragm I, and it can be used for a long time, making it extremely effective.

Further, since the piston (5) is caused to reciprocate by means of the eccentric cam (4), the configuration is extremely simple and can be manufactured easily and at low cost.

As described above, according to the present invention, there is provided a hydraulic diaphragm pump that has revolutionary effects such as being able to reliably and effectively suck and discharge liquids such as water, oil, and chemicals. .

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, and FIG. 1 is an overall vertical internal view, FIG. 2 is a partial sectional view, FIG. 3 is a partial sectional view of the inspector, and FIG. 4 is an exploded perspective view thereof. . (a)...Driving oil, (1)...Main pump body, (2)...
・Main pump head, (3)... Drive shaft, (4)... Rinshin cam, (5)... Piston, (6) Fist/V-knee, (7)...
Pressure spring, (8)... Suction concave arc structure, (9) Φ/Communication hole,
Cod: Flow hole, aυ: Sub pump body, a: - Sub pump chamber, 0: Diaphragm, ■/° Piston hole, (c)
°・Bridge path, --・Suction check valve, a7)・Suction connection path, a8・・Discharge check valve, cod・・Discharge connection path. ``A No Koga 7 Ame 2 B Procedural Amendment 1 Wandering Type) % Formula % 1. Indication of the case 1982 Patent Application No. 208397 2. Name of the invention Hydraulic diaphragm pump 3. Person making the amendment Related Patent Applicant: Riken Seiki Co., Ltd. 5. Date of Amendment Order: Showa Year, Month, Day (Voluntary) 6. Subject of Amendment Special consideration in the "Detailed Description of the Invention" column in the specification [31S・-1101638? The following amendments are made to Particulars 1 of Supplementary JE Procedures No. 2. Note l Page 7, line 119, line 11 and 1ilo, line 1j, add the following sentence. ``Also, the Diamond 7 Tsum U is shown to be flat in this example, but in this case, only the flat 4e is exposed. The elongated cap-like shape of the member's base also deceives the cover.'' Page 8, No. 11ffii, r-main pump consideration is) 丙 (two returned,'' it says, ``main. Boypu blockage (2) and screw y?L
a4),” is corrected.

Claims (1)

[Claims] A drive shaft is rotatably installed in the main pump chamber of the main pump body containing propellant oil, an eccentric cam is fixed to the outer peripheral surface of the drive shaft, and at least one piston is installed in the main pump body. is installed to be slidable in the radial direction of the drive shaft, a shoe is interposed between the fitting part of the piston and the cam outer circumferential surface of the eccentric cam, and the piston is pushed by a pressing spring through the shoe. Pressed against the cam outer circumferential surface of the eccentric cam, and shaped into the cam outer circumferential surface of the eccentric cam to approximately half of the suction concave arc *1 - force cam outer circumferential surface,
At the same time, a communication hole is provided in the center of the piston (noted separately), and a sub-pump body is attached to the main pump body, and a sub-pump body is attached to the main pump body. A diaphragm is partitioned and internally installed in the pump chamber, a bridge path is formed between the primary shell of the diaphragm and the piston Y hole of the piston, and a suction check valve is provided in communication with the secondary side of the diaphragm. A hydraulic diaphragm pump characterized in that a classification passage and a discharge connection passage having a discharge check valve are formed in the sub-pump body, respectively.