JP3258856B2 - Stirling equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a stirling machine having a crank mechanism, and more particularly to a stirling machine suitable for preventing abrasion of a crankshaft.

[0002]

2. Description of the Related Art In general, a Stirling apparatus compresses or expands a working gas by reciprocating a piston in a cylinder by rotation of a crankshaft of a crank mechanism. It is essential to operate.

FIG. 2 shows a Stirling machine having such a crank mechanism.

[0004] In the figure, a crank mechanism 1 is formed in a case body 2, and a left body 2 a is provided inside a lower portion of the case body 2.
The left body 2a and the case body 2
The crankcase 3 is formed by the right body 2b and the bearing 4a fitted to the left body 2a and the bearing 4b fitted to the right body 2b.
Is mounted on the shaft. A spacer 5a is interposed between the outer wall of the left body 2a and the step of the crankshaft 7, and a spacer 5b is interposed between the inner wall of the left body 2a and the step of the crankshaft 7. . Further, a lubricating oil supply unit 8 is disposed on the left side body 2c of the case body 2. A balancer 10 is fixed to the crankshaft 7 for maintaining the balance of the entire rotating body as the crank arm 9 rotates.

The bottom of the crankcase 3 has lubricating oil 11
And an oil scraper 12 for scraping the lubricating oil 11 is attached to one end of the crankshaft 7.
The lubricating oil supply unit 8 communicates with an oil supply hole 13 formed in the axial direction of the crankshaft 7, and forms an oil supply system by the oil hole that supplies the lubricating oil 11.

Above the crank mechanism 1, there is provided a piston 14 which moves up and down by crank movement.
An expansion space 15 is formed in front of 4. A crankshaft 7 is extended outside the right side body 2b of the crank mechanism 1 and connected to the motor shaft 6, so that the motor rotor 16
Is covered by a motor cover 18. Reference numeral 19 denotes a heat regenerator.

Here, when the motor rotor 16 rotates,
The crankshaft 7 connected to the motor shaft 6 rotates, and the piston 14 is moved up and down by the interlocking crank arm 9.

On the other hand, the rotation of the crankshaft 7 causes the oil scraper 12 to rotate in conjunction therewith, and the oil scrapers provided at both ends of the oil scraper 12 lubricate the bottom of the case body 2.
The lubricating oil is stirred up and stored in the lubricating oil supply unit 8, and the lubricating oil 11 is supplied from the oil supply hole 13 of the crankshaft 7 to the bearings 4a and 4b. Thereby, the lubricating oil 11 is always supplied to each bearing, and each operation can be performed smoothly.

The crankshafts 7 at both ends of a bearing 4a disposed on the left body 2a forming the crankcase 3
The axial movement of the crankshaft 7 is prevented by the spacers 5a and 5b interposed therebetween, and the wear of the crankshaft 7 itself is prevented by abrading the spacers 5a and 5b made of a material that is relatively easily worn. are doing.

In the description of FIG. 2, the lubricating oil 11 is supplied from the lubricating oil supply unit 8 to each bearing such as the crankshaft 7.
There has been proposed a means for sucking the lubricating oil 11 from the bottom of the lubricating oil and supplying the lubricating oil 11 to each bearing such as a crankshaft. According to this means, the lubricating oil 11 can be efficiently supplied to the oil supply hole 13 and the space for the lubricating oil supply unit 8 and the like is not required.

[0011]

Means for supplying lubricating oil to a crankshaft or the like using an oil pump has recently been proposed as described above, but instead of an oil scraper 12 shown in FIG. If an oil pump requiring hermeticity is attached to the outer wall of the left body 2a, it becomes impossible to interpose the spacers 5a and 5b on both side walls of the left body 2a. In this case, if the spacer is not used at all, there is a problem that the crankshaft itself is worn.

Accordingly, an object of the present invention is to provide a Stirling machine which uses an oil pump and prevents wear of a crankshaft.

[0013]

According to the present invention, there is provided a crankcase having one side body in which one bearing is fitted and the other side body in which the other bearing is fitted, and which stores lubricating oil therein. A crankshaft having an oil supply system for supplying lubricating oil to each bearing and a crank arm for reciprocating a piston, one end of which is axially mounted on one bearing and the other end of which is axially mounted on the other bearing And an oil pump that rotates in conjunction with the crankshaft and supplies the internal lubricating oil of the crankcase to each bearing via an oil supply system of the crankshaft. To prevent axial movement of the crankshaft between the crankshaft and the stepped portion of the crankshaft provided correspondingly to the inner side walls of these two side bodies, and to wear the crankshaft. A spacer to prevent is obtained so as to interposed.

[0014]

According to the present invention, spacers are respectively interposed between the inner side walls of the one and the other side bodies and the step portions of the crankshaft provided corresponding to the respective side bodies. This prevents the crankshaft from moving in the axial direction, further wears out the spacers and allows them to be replaced as appropriate, preventing the crankshafts from contacting and abrading each side body.

[0015]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a partial sectional view of a crank mechanism of a Stirling machine according to an embodiment of the present invention, wherein 1A is a crank formed between a left body 2e and a right body 2f in a case body 2d. A crank mechanism mounted on case 3;
Reference numeral 7 denotes a crankshaft mounted on bearings 4a and 4b fitted to the left body 2e and right body 2f, respectively, and connected to a motor shaft (not shown). Reference numeral 9 denotes a crank arm provided at the center of the crankshaft 7 for performing a crank motion. A balancer 10 is provided on the crank arm 9.

Reference numeral 20 denotes an oil pump which is provided outside the left side body 2e and sucks the lubricating oil 11 at the bottom of the crankcase 3 and supplies it to each bearing through an oil supply hole 13 provided in the crankcase 3. The fixed portion 20a is fixed to the outer wall of the left body 2e, the shaft 20b is connected to one end of the crankshaft 7, and is composed of an oil feed portion 20d and a suction hose 20e together with a suction portion 20c interlocked by the rotation of the shaft 20b. I have. Note that, as the oil pump 20, a trochoid pump or the like is used.

Reference numeral 21a is interposed between the inner wall of the left body 2e forming the crankcase 3 and the step 22a provided corresponding to the left body 2e on the crankshaft 7 mounted on the bearing 4a. In one spacer, the spacer 21a is an annular body loosely fitted to the crankshaft, and is made of a high-tensile steel plate having a lower hardness than the left body 2e and the crankshaft 7 and being relatively easily worn.

The other side 21b is interposed between the inner wall of the right side body 2f similar to the spacer 21a and the step 22b provided corresponding to the right side body 2f on the crankshaft 7 mounted by the bearing 4b. Spacer 21b
Is made of the same material as the spacer 21a and of the same material. Reference numeral 23 denotes a piston shaft, and the piston and the like that make a crank motion by the crank mechanism 1A are the same as those in FIG.

With the above arrangement, the crankshaft 7 is mounted on the bearings 4a and 4b with the rotation of a motor (not shown).
Rotates, a piston (not shown) reciprocates via the piston shaft 23 by the interlocking crank arm 9.

At this time, the rotation of the crankshaft 7 causes the suction portion 20c to rotate via the shaft 20b of the oil pump 20, and the lubricating oil 11 at the bottom of the crankcase 3
Is sucked from the suction hose 20e and supplied from the oil feed section 20d to the oil supply hole 13 of the crankshaft 7, and the lubricating oil 11 is supplied to each bearing, so that the crank arm 9 and the like operate smoothly.

On the other hand, as the crankshaft 7 rotates, the crank arm 9 rotates to apply a load to the crankshaft 7, but the inner walls of the left and right bodies 2e and 2f into which the bearings 4a and 4b are inserted and The spacers 21a and 21b interposed between the stepped portions 22a and 22b of the crankshaft 7 provided correspondingly prevent the axial movement of the crankshaft 7, and a stable crank motion is performed.

Further, the spacers 21a and 21b are worn by the contact with the crankshaft 7 and are worn away. Thus, the crankshaft 7 itself and the left and right body 2e,
2f, and further, it is possible to prevent the bearings 4a, 4b from being worn away.

[0024]

As described above, according to the present invention, the oil pump is used to efficiently supply the lubricating oil to the crankshaft and the like, and while the oil pump is provided, the inner side walls of the left and right bodies are not removed. Spacers are provided between the corresponding step portions of the crankshaft to prevent the axial movement of the crankshaft, and furthermore, it is possible to prevent the crankshaft from being worn down due to wear of the spacer.

[Brief description of the drawings]

FIG. 1 is a schematic cross-sectional view of a crank mechanism of a Stirling machine showing one embodiment of the present invention.

FIG. 2 is a schematic sectional view of a crank mechanism of a Stirling device showing a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Crank mechanism 2 Case main body 2a, 2c Left side body 2b, 2e, 2f Right side body 2d Case main body 3 Crank case 4a, 4b Bearing 5a, 5b, 21a, 21b Spacer 6 Motor shaft 7 Crank shaft 8 Lubricating oil supply part 9 Crank arm REFERENCE SIGNS LIST 10 balancer 11 lubricating oil 12 oil scraping part 13 oil supply hole 14 piston 15 expansion space 16 motor rotor 17 motor stator 18 motor cover 19 heat regenerator 20 oil pump 20a fixing part 20b shaft 20c suction part 20d oil feeding part 20e suction Hose 22a, 22b Step 23 Piston shaft

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-64-87853 (JP, A) JP-A-1-249950 (JP, A) JP-A-4-125364 (JP, A) JP-A 8- 303894 (JP, A) Japanese Utility Model Hei 5-7915 (JP, U) (58) Field surveyed (Int. Cl. ⁷ , DB name) F25B 9/14 520 F02G 1/053

Claims (1)

(57) [Claims] 1. A crankcase having one side for fitting one bearing and the other side for fitting the other bearing and storing lubricating oil therein, and lubricating oil for each bearing. A crankshaft having a supply oil supply system and a crank arm for reciprocating a piston, one end of which is axially mounted on the one bearing, and the other end of which is axially mounted on the other bearing; An oil pump that rotates in conjunction with the oil supply that supplies the lubricating oil inside the crankcase to the bearings through the oil supply system of the crankshaft, wherein the inside of each of the one and the other side bodies is provided. An axial movement of the crankshaft is prevented between a wall and a stepped portion of the crankshaft provided respectively corresponding to the inner side walls of these two side bodies, and Stirling device being characterized in that interposed a spacer to prevent the abrasion of the rank shaft.