JPH0311430Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention is a vibratory compressor, in particular, a compressor body containing a built-in compressor driven by a so-called swing motor has springs on at least one end face in the longitudinal direction. The present invention relates to an improvement in an oil supply tube for supplying lubricating oil to the compressor body in a vibratory compressor configured to be elastically supported by an elastic member such as the above.

[Conventional technology]

Conventionally, a vibratory compressor used as a compressor for, for example, an on-vehicle refrigerator has a structure as shown in FIG. In the same figure, a vibrating compressor 1
The compressor main body 3 is elastically supported by springs 4 and 5 in a cylindrical airtight container 2 formed by a cylinder 2a and lid plates 2b and 2c that close both open ends of the cylinder 2a. ing.

The casing 6 of the compressor main body 3 is constructed by fixing a closing member 8 to the other end, that is, the lower end of a yoke 7, in which one end, that is, the upper end, of a cylindrical portion 7a is closed by a pot-shaped bottom 7b. The bottom 7b is formed into a pot shape by, for example, forging, and is formed by turning, for example, to have a stepped portion 7c that perpendicularly intersects the inner peripheral surface of the cylindrical portion 7a, and a fitting that fits into the inner peripheral surface. A joint portion 7d is formed. Then, as shown in the figure, the fitting portion 7d is fitted into the inner circumferential surface of the cylindrical portion 7a, and the bottom 7b
The yoke 7 is constructed by fixing (for example, welding) the cylindrical portion 7a and the cylindrical portion 7a. Also,
The closing member 8 is basically formed into a thick disk shape, and is fitted to the lower end of the yoke 7. A mounting plate 9 is formed on the inner circumferential surface of the lower end of the yoke 7 by cutting out a part of a ring-shaped disk.
The closing member 8 is fixed to the lower end of the yoke 7 by screwing a plurality of screw members 10 passing through the closing member 8 into the mounting plate 9 and tightening them.

Inside the casing 6, there is an arc-shaped permanent magnet 1.
1 is fixed so as to be in contact with the inner circumferential surface of the yoke 7 and the stepped portion 7c. Also, in bottom 7b,
A pole piece 13 for forming an annular gap 14 with the permanent magnet 11 is fixed by a screw member 15 via a permanent magnet (alnico magnet) 12.

A drive coil 16 is disposed in the gap 14 so as to be able to reciprocate in the axial direction of the casing 6, that is, in the vertical direction. This drive coil 16 is wound around a support member 17, and the support member 17 is fixed to a cylindrical piston 18 that is concentric with the axis of the casing 6.
Therefore, the drive coil 16 and the piston 18 are substantially integrated. This piston 18 slides into a cylinder portion 19 that is integrally provided with the closing member 8 so as to protrude into the casing 6 .
Further, a resonance spring 20 is interposed between the pole piece 13 and the support member 17, and a resonance spring 21 is also interposed between the support member 17 and the closing member 8. Therefore, the piston 18 is connected to a pair of upper and lower resonant springs 20, 2.
1. Furthermore, a suction valve 22 is provided at the lower end of the piston 18.

A cap-shaped lid 23 is fixed to the lower part of the closing member 8 by bolts (not shown). This cap-shaped lid 23
A discharge valve chamber 25 located further below the cylinder chamber 24 located below the piston 18 in the cylinder portion 19 is provided between the closing member 8 and the hole provided in the closing member 8. shape lid 23
A high pressure chamber 26 and a low pressure chamber 27 are formed. The cap-shaped lid 23 also includes a discharge valve chamber 25.
A communication passage 28 communicating between the high pressure chamber 26 and the high pressure chamber 26 is bored. Further, a discharge pipe 29 communicating with the high pressure chamber 26 is provided, and the discharge pipe 29 passes through the lid plate 2c and is drawn out to the outside, and is connected to, for example, a condenser of a refrigerator (not shown). Furthermore, the low-pressure refrigerant discharged from the condenser is passed through the suction pipe 30a, which is provided through the lid plate 2c, and the cap-shaped lid 2.
3 and communicates with the low pressure chamber 27.
b, and is introduced into the casing 6, that is, the inside of the compressor main body 3, through the suction pipe 30c that communicates the low pressure chamber 27 with the inside of the casing 6.

The discharge valve chamber 25 includes a discharge valve 32 that can be seated on a valve seat 31 provided on the closing member 8 at the lower end of the cylinder chamber 24, and a pressure spring 33 that urges the discharge valve 32 in a direction to seat on the valve seat 31. is stored.

Further, a power supply terminal 34a is attached to the cover plate 2c. Connection members 34b and 34c are provided to connect the power supply terminal 34a and the resonance spring 21. Further, the drive coil 16 and the resonance spring 21 are connected by a lead wire 35a, and the drive coil 16 and the resonance spring 20 are connected by a lead wire 35b. Therefore, one end of the drive coil 16 is connected to the power supply terminal 34a via the lead wire 35a, the resonant spring 21, and the connecting members 34c, 34b, and the other end is connected to the lead wire 35b, the resonant spring 20, and the pole piece. 1
3. Connected to the closed container 2 via the screw member 15, the bottom 7b, and the spring 4. Therefore, by applying an alternating voltage between the power supply terminal 34a and the closed container 2, it is possible to supply an alternating current to the drive coil 16.

Furthermore, the bottom 7b and the cap-shaped lid 23 have protrusions 7.
b' and 23', and the cover plates 2b and 2c are provided with ring-shaped buffer members 36 and 37 made of an elastic material such as rubber at positions corresponding to the projections 7b' and 23'. is provided. Therefore, it is possible to suppress undesired rocking of the compressor main body 3 to a minimum range by the buffer members 36 and 37.

Next, 38 is an oil supply tube, which is formed into a hollow cylindrical shape by braiding fibers, and a coil spring and a core wire (none of which are shown) are enclosed inside to ensure the shape of the fibers and stability. be. One end of the oil supply tube 38 is fixed to the suction pipe 30b communicating with the low pressure chamber 27, and the other portion is arranged in a spiral shape within an oil reservoir 39 in the lid plate 2c constituting the closed container 2. .

With the above configuration, by passing an alternating current through the drive coil 16, the piston 18 vibrates up and down together with the drive coil 16 depending on the polarity of the alternating current. Moreover, the vertical vibration of the piston 18 is amplified by the pair of upper and lower resonance springs 20 and 21. Due to the amplified vertical vibration of the piston 18, the suction valve 22 and the discharge valve 32 perform a pumping action, and the fluid such as the refrigerant introduced into the container 2 flows through the suction pipes 30a, 30b, the low pressure chamber 27, and the suction pipe 30c.
It flows into the inside of the casing 6 through the piston 18, the suction valve 22, the cylinder chamber 24, and the discharge valve 32, and flows into the discharge valve chamber 25, and further through the communication passage 28, the high pressure chamber 26, and the discharge pipe 29. It is discharged into refrigerator condensers, etc. During the above operation, the lubricating oil flows from the oil reservoir 39 through the oil supply tube 38 made of braided fibers and into the casing 6 through the suction pipe 30b, the low pressure chamber 27, and the suction pipe 30c together with fluids such as refrigerant. Enter, piston 1
8. Continue smooth operation by lubricating other moving or sliding parts.

[Problem that the invention attempts to solve]

When the conventional vibratory compressor is used, for example, as an on-vehicle refrigerator, it may be subject to severe vibrations and may be tilted for long periods of time. In such a case, various inconveniences arise.
In other words, since the oil supply tube 38 is simply placed in the oil reservoir 39, if the above-mentioned vibrations are applied or the entire compressor is tilted, the oil supply tube 38 may move or jump up. occurs. In order to prevent such a situation from occurring, a coil spring and a core wire are enclosed in the oil supply tube 38, but even this may not prevent movement or jumping up. For this reason, the oil supply tube 38 may interfere with the support spring 5 and become pinched, interrupting normal oil supply to the compressor body 3, and causing unexpected damage such as damage to moving parts and burnout of the drive coil 16. There is a problem that accidents occur.

The present invention solves the above-mentioned problems with conventional systems, and makes it possible to interrupt oil supply to the compressor body even when external forces such as vibrations are applied or when the compressor is operated at an angle. It is an object of the present invention to provide a vibrating compressor that can perform the operation smoothly and reliably.

[Means for Solving the Problems] In order to solve the above problems, in the present invention, a permanent magnet and , a pole piece forming an annular gap with respect to the permanent magnet is fixedly disposed, and a drive coil energized by alternating power is disposed in the gap so as to be movable in the axial direction of the casing, The compressor body includes a compressor body in which a piston substantially integral with the drive coil is slidably engaged with a cylinder portion provided in the closing member, and the compressor body is supported by an elastic member on at least one end surface in the longitudinal direction. In a vibratory compressor configured to be used for suction of low-pressure refrigerant, one end of an oil supply tube made of braided fibers is fixed to the oil supply port of the compressor body, and the other end is opened into an oil reservoir. They adopted the technical means of inserting and fixing it into the pipe via a stopper.

[Effect]

By adopting the above-mentioned technical means, the oil supply tube is securely fixed in the oil sump and does not move or jump up, thereby ensuring oil supply to the compressor body. Furthermore, by inserting and fixing one end of the refueling tube into the low-pressure refrigerant suction pipe via a stopper, the suction action of the refrigerant promotes the suction of lubricating oil, which also has the effect of improving suction efficiency.

〔Example〕

FIG. 2 is a longitudinal cross-sectional view of essential parts showing an embodiment of the present invention, and the same parts are designated by the same reference numerals as in FIG. 1. In the figure, a fixing stopper 41 is provided at the free end of the oil supply tube 38 via a holder 40, and the oil supply tube 38 is inserted and fixed into the suction pipe 30a opening into the oil reservoir 39. In this case, the fixing stopper 4
1 is preferably made of an elastic material such as a spring material, and has an outer diameter slightly larger than the inner diameter of the suction pipe 30a.

3a, b, and c are diagrams each showing an example of the shape of the stopper 41, but other shapes can also be freely selected. In short, when inserted into the suction pipe 30a, the refueling tube Any material that can secure the free end of 38 may be used.

FIG. 4 is an enlarged sectional view of main parts showing another embodiment of the present invention, and the same parts are designated by the same reference numerals as in FIGS. 1 to 3. In the figure, reference numeral 42 denotes a stopper, which is formed by, for example, a permanent magnet with a hole 42a in the center. By forming it in this way, the free end of the oil supply tube 38 can be inserted and fixed into the suction pipe 30a formed from a magnetic material. Furthermore, by forming the stopper 42 with a permanent magnet, in addition to fixing the oil supply tube 38, it also prevents harmful substances such as iron powder mixed into the refrigerant or lubricating oil from entering the compressor main body 3. can be prevented. Note that the shape of the stopper 42 is not limited to the hollow cylindrical shape shown in FIG. 4, but may also be a hollow disc shape, a disc or cylinder having a plurality of through holes, etc.
Other shapes can be selected.

[Effect of idea]

Since the present invention has the structure and operation as described above, the oil supply tube is reliably fixed within the oil sump, and oil supply to the compressor body is ensured.
Therefore, there is no need to include a spring to prevent movement or jumping up. Furthermore, by inserting and fixing one end of the oil supply tube into the low-pressure refrigerant suction pipe, there is also the effect that the supply of lubricating oil is further promoted. As a result of the above, there is an effect that the reliability of the vibratory compressor can be greatly improved and the scope of application and fields can be expanded.

[Brief explanation of the drawing]

Fig. 1 is a vertical cross-sectional view showing a vibrating compressor that is the subject of the present invention, Fig. 2 is a longitudinal cross-sectional view of main parts showing an embodiment of the present invention, and Fig. 3 a, b, and c are respectively shown in Fig. 2. FIG. 4 is a partially enlarged sectional view showing an example of a fastener, and FIG. 4 is an enlarged sectional view of a main part showing another embodiment of the present invention. 3... Compressor main body, 30a, 30b... Suction pipe, 38... Oil supply tube, 39... Oil sump, 4
1,42...stop.

Claims (1)

[Claims for Utility Model Registration] A permanent magnet and a pole piece forming an annular gap between the permanent magnet and the permanent magnet in a casing consisting of a cylindrical yoke with one end closed and the other end closed with a closing member. are fixedly disposed, a drive coil energized by alternating power is disposed in the gap so as to be movable in the axial direction of the casing, and a piston substantially integral with the drive coil is disposed in the closing member. A vibratory compressor is provided with a compressor main body that is slidably engaged with a cylinder portion of the compressor, and is configured such that the compressor main body is supported by an elastic member on at least one end surface in the longitudinal direction, in which the fibers are braided. One end of the oil supply tube is fixed to the oil supply port of the compressor body, and the other end is inserted and fixed via a stopper into a low-pressure refrigerant suction pipe that opens into the oil reservoir. compressor.