JPH0544402A - Fluid pump and scroll type fluid machine - Google Patents

Abstract

PURPOSE:To offer a fluid pump that allows horizontal disposition of a fluid machine which becomes unusable due to circulation incapability caused by inoperativeness of its built-in pump taking place when the machine is laid on its side of lubricant like a vertical shaft closed housing type scroll compressor. CONSTITUTION:A cylinder hole 103 and a discharge passage 93 that communicates with the cylinder hole 103 are provided from the outer periphery toward the center, of a rotary member 21 that performs revolution/rotation motion and a piston 101 formed by axially drilling a suction passage 92 which pernetrates it is inserted freely slidably into the cylinder hole 103. And, the outer end of the piston 101 is forced to abut on a guide member 104 fixed to a position of constance distant from the rotating center 0 of the rotary member 21, the piston 101 is forced to perform a stroke along the cylinder hole 103 accompanying the revolution/rotation motion of the rotary member 21, and, at the same time, a suction hole is opened/closed at specified timings 92, 94, thereby fluid is sucked in.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fluid pump and a scroll type fluid machine.

[0002]

2. Description of the Related Art For example, an example of a conventional scroll type compressor will be described with reference to a vertical sectional view of FIG. 4. Inside a hermetically sealed housing 8, a scroll type compression mechanism C is provided at an upper portion and an electric motor M is provided at a lower portion. The scroll type compression mechanism C allows the revolving motion of the fixed scroll 1, the revolving scroll 2 and the revolving scroll 2, but prevents the rotation of the revolving member such as an Oldham ring, the fixed scroll 1, the fixed scroll 1 and the electric motor. Frame 6, to which M is fastened
Upper bearing 71 and lower bearing 7 that pivotally support the rotating shaft 5.
2. It consists of an orbiting bearing 73 and a thrust bearing 74 which support the orbiting scroll 2. Fixed scroll 1 is end plate 11
And a spiral wrap 12 erected on its inner surface,
The end plate 11 is provided with a discharge boat 13 and a discharge valve 17 for opening and closing the discharge boat 13, and the orbiting scroll 2 is provided with an end plate 21 and a spiral wrap 22 erected on the inner surface thereof.
A drive bush 25 is rotatably fitted into a boss 23 provided upright on the outer surface of the end plate 21 through a slewing bearing 73, and an eccentric hole formed in the drive bush 25 extends from the upper end of the rotary shaft 5. The protruding eccentric pin 53 is rotatably fitted. And this drive bush 2
A balance weight 84 is attached to 5. The fixed scroll 1 and the orbiting scroll 2 are eccentric to each other by the orbiting orbiting radius and engage with each other by shifting the angle by 180 ° to form a plurality of closed spaces 2 in point symmetry.
4 are formed. In such a structure, by driving the electric motor M, the orbiting scroll 2 is driven via the rotating shaft 5, the eccentric pin 53, the drive bush 25, and the boss 23, and the orbiting scroll 2 is rotated by the rotation preventing mechanism 3. While being blocked, it makes a revolution revolution motion on a circular orbit of revolution revolution radius. Then, the gas enters the housing 8 through the suction pipe 82, and the electric motor M
After being cooled, it is sucked into the closed space 24 from the suction passage 15 provided in the fixed scroll 1 through the passage 85 formed in the frame 6 and the suction chamber 16. Then, as the volume of the sealed space 24 decreases due to the orbiting movement of the orbiting scroll 2, the space reaches the center while being compressed, and the discharge valve 17 is pushed open from the discharge boat 13 into the discharge cavity 14 and further discharged. It is discharged to the outside through the pipe 83. During the rotation of the rotary shaft, the lubricating oil 81 stored in the inner bottom portion of the housing 8 is sucked up by the centrifugal pump 51 provided in the lower inner portion of the rotary shaft 5, and the lubrication hole 52 is provided.
Through the lower bearing 72, the eccentric pin 53, the upper bearing 71,
After lubricating the rotation preventing member 3, the slewing bearing 73, the thrust bearing 74, etc., they are discharged through the chamber 61 and the oil drain hole 62, and are stored in the bottom portion of the closed housing 8.

[0003]

However, if a compressor of this type is laid horizontally as shown in FIG. 5, the centrifugal pump 51 provided on the shaft cannot be submerged in the lubricating oil 81. Special lubrication means is required for the bearing 72, the eccentric pin 53, the upper bearing 71, and the orbiting bearing 73.

The present invention has been proposed in view of the above circumstances, and a lateral fluid machine such as a hermetic housing scroll type fluid machine having a swirling member such that the built-in lubricating oil pump becomes useless when horizontally placed. An object of the present invention is to provide a fluid pump and a scroll type fluid machine that can be placed.

[0005]

To this end, the invention according to claim 1 provides a swiveling member which performs a revolving swivel motion, from the outer circumference toward the center thereof with a cylinder hole and a discharge passage communicating with the cylinder hole. A piston formed by penetrating an intake passage in the axial direction is slidably inserted therein, and the outer end of the piston is brought into contact with a guide member fixed at a fixed distance from the center of rotation of the rotating member. The piston is stroked along the cylinder hole with the revolving motion of the swiveling member, and the fluid is sucked by opening and closing the suction port at a predetermined timing.

According to a second aspect of the present invention, in the fluid pump according to the first aspect, the orbiting member is an orbiting scroll member constituting a scroll type fluid machine installed in a hermetic housing, and the guide member is a bottom portion of the hermetic housing. It is characterized in that it is a built-in lubricating oil pump which is installed in the housing and supplies the lubricating oil sealed in the bottom portion of the housing.

[0007]

According to the invention of claim 1, the guide member is provided with the outer end of the piston inserted into the substantially radial cylinder hole formed in the turning member along with the revolution of the turning member and attached to the inner surface of the housing. When overcoming the vehicle, the piston slightly strokes inward in the radial direction by the guide member, and at that time, the lubricating oil that dips the guide member is pumped toward the center by the piston, and thus, once every one rotation of the turning member, the piston Pumps back and forth. Here, since the opening and closing timings of the suction port and the discharge port are controlled by the swirling motion and the reciprocating motion, the suction valve and the discharge valve are unnecessary. The suction port and the discharge port can be provided on either one of the piston side and the cylinder hole side, and the pump has two cylinders, and a plurality of pumps can be easily installed. According to the invention of claim 2, the lubricating oil collected in the lower part of the housing in the horizontally sealed hermetic housing type scroll compressor forcibly lubricates each sliding portion of the scroll compressor by the reciprocating pumping action of the piston. Therefore, the hermetic housing type scroll compressor operates effectively despite the horizontal orientation.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment in which the present invention is applied to a scroll type fluid machine will be described with reference to the drawings. FIG. 1 is a longitudinal sectional view thereof, FIG. 2 is a sectional view taken along the line II-II of FIG. 1, and FIG. FIG. 3 is a sectional view taken along line III-III of FIG.

In the above drawing, the same reference numerals as those in FIG. 5 indicate the same members as those in FIG. 5, and the major difference of the present invention from the structure of FIG. 5 is that the orbiting scroll has a piston type pump for utilizing its orbiting motion. It has been done. First,
In FIG. 1, 92 is a suction passage communicating with the pump suction port, 93 is a discharge passage communicating from the pump discharge port to an axial oil supply hole 52 provided in the eccentric pin 53, and 91 is an oil provided in the radial direction of the balance weight. Hole, the inner end is the oil supply hole 52,
The outer end opens into the chamber 61. Reference numeral 63 is a pressure equalizing hole for making the pressure in the chamber 61 equal to the pressure in the housing 8, and 100 is the pump mechanism of the present invention. Next, in FIGS.
Explaining the structure of the pump mechanism, 101 is a piston and 1 is a piston.
Reference numeral 02 is a spring for urging the piston 101, 103 is a cylinder, and 104 is a suction timing control guide, which constitute the pump mechanism 100.

In such a structure, when the orbiting scroll 21 orbits with the orbiting radius ρ, the tip of the piston 101 moves on the suction port timing control guide 104. At this time, the piston 101 reciprocates in a cylinder 103 provided in the orbiting scroll 21 in a stroke equal to 2ρ, so that when the cylinder hole diameter is D, the volume change of the formula (1) occurs. Vo = (π / 4) D ² × 2ρ For the orbiting motion of this orbiting scroll 21, the piston 10
The outer edge of 1 is also the inlet timing control guide 1
Although it moves on 04, the groove 94 provided in the guide 104 and the suction passage 92 provided in the piston 101 are made to communicate with each other. Now, the volume of the cylinder hole 103 becomes the smallest, that is, the volume of the cylinder hole 103 becomes the minimum when the orbiting scroll 21 is right below in FIG. 2, and from this position the groove 94 provided in the guide and the suction provided in the piston. Since the passage 92 starts to communicate with each other, the orbiting scroll 21 is located right above the paper surface, and the groove 94 and the suction passage 92 are finished communicating at a position where the volume of the cylinder 103 is maximized.
The groove 94 and the suction passage 92 communicate with each other only in the so-called suction stroke in which the cylinder hole 103 is from the smallest to the largest. Further, during the discharge stroke of the cylinder hole 103, the outer end of the piston 101 is provided with a groove 94 in the suction timing control guide 104.
Therefore, the lubricating oil that was in the closed state and was in the housing 8 during the intake stroke flowed into the groove 94 and the intake passage 92 and entered the cylinder hole 103, but was discharged in the discharge stroke 93 during the compression stroke. As a result, the oil is fed to the oil supply hole 52 formed in the eccentric pin 53. Therefore, the pump according to the present invention is an inexpensive pump mechanism that does not have a suction valve and a discharge valve and does not reversely flow. Since the displacement amount is given by the equation (1), it is easy to secure the required oil amount by selecting the cylinder diameter D. Since the intake port and the discharge port can be provided on either the piston side or the cylinder hole side, a lubricating oil flow passage can be provided according to the location of lubrication. Easy to install.

[0011]

According to such a structure, a cylinder hole in a substantially radial direction is provided in a member that performs a swiveling motion, and a built-in pump is constructed by reciprocating movement of a piston inserted inside the cylinder hole by a guide member. Therefore, a suction valve and a discharge valve are not required, and an inexpensive, efficient and highly reliable pump can be provided.

In short, according to the first aspect of the present invention, the revolving member performing the revolving revolving motion is provided with the cylinder hole and the discharge passage communicating with the cylinder hole from the outer circumference toward the center thereof, and the cylinder hole is axially extended in the cylinder hole. A piston formed by penetrating the suction passage is slidably inserted, and the outer end of the piston is brought into contact with a guide member fixed at a fixed distance from the turning center of the turning member, and The piston is stroked along the cylinder hole along with the revolution movement, and the fluid is sucked by opening and closing the suction port at a predetermined timing, so that the fluid can be placed horizontally like a sealed housing scroll type fluid machine. If so, a fluid pump and a scroll-type fluid machine can be provided in which a fluid machine having a turning member such that the built-in lubricating oil pump becomes useless can be placed horizontally. The present invention is extremely useful on the industry. According to the invention of claim 2, in the fluid pump of claim 1, the orbiting member is an orbiting scroll member constituting a scroll type fluid machine installed in a hermetically sealed housing, and the guide member is provided at a bottom portion of the hermetically sealed housing. However, by using a built-in lubricating oil pump that supplies the lubricating oil sealed in the bottom of the housing, a rotating member that prevents the built-in lubricating oil pump from working when placed horizontally like a sealed housing scroll type fluid machine is used. INDUSTRIAL APPLICABILITY The present invention is extremely useful industrially because a fluid pump and a scroll-type fluid machine that allow the existing fluid machine to be placed horizontally can be obtained.

[Brief description of drawings]

FIG. 1 is a vertical sectional view showing an embodiment of the present invention.

FIG. 2 is a cross-sectional view showing the pump mechanism of FIG.

FIG. 3 is a sectional view taken along the line III-III of FIG.

FIG. 4 is a vertical cross-sectional view showing a known vertical scroll compressor.

5 is a vertical cross-sectional view showing a state in which the vertical scroll compressor of FIG. 4 is horizontally placed.

[Explanation of symbols]

 8 Housing 21 Orbiting Scroll 92 Intake Passage 93 Discharge Passage 94 Groove 100 Pump Mechanism 101 Piston 102 Spring 103 Cylinder Hole 104 Control Guide

Claims (2)

[Claims] 1. A swirl member which makes an orbital swivel motion is provided with a cylinder hole and a discharge passage communicating with the cylinder hole from the outer circumference toward the center thereof, and an intake passage is axially penetrated through the cylinder hole. Is slidably inserted into the piston, and the outer end of the piston is brought into contact with a guide member fixed at a fixed distance from the center of rotation of the swivel member. Is stroked along the cylinder hole, and the suction port is opened and closed at a predetermined timing to suck the fluid. 2. The fluid pump according to claim 1, wherein the orbiting member is an orbiting scroll member constituting a scroll type fluid machine installed in a hermetically sealed housing, and the guide member is provided at a bottom portion of the hermetically sealed housing. A scroll type fluid machine characterized by being a built-in lubricating oil pump for supplying lubricating oil sealed in the bottom portion.