JP3469810B2 - Multistage compression device - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a multi-stage compression apparatus for compressing a required gas such as nitrogen gas to a high pressure in multiple stages, and more particularly to grease in a yoke. The present invention relates to a highly reliable multi-stage compression device capable of supplying the pressure. As this type of multistage compression apparatus, as the number of compression stages increases, the diameter of the reciprocating compression section, that is, the compression section formed by the cylinder and the piston, becomes smaller as the pressure becomes higher.・ W-type, semi-star-type, star-type, counter-balance type, etc., and multi-step by connecting and interlocking with the crankshaft so that each compression part operates in the stroke shifted to the required phase A configuration in which a mechanism for performing a compression operation is operated by a drive source such as an electric motor is disclosed (Japanese Society of Mechanical Engineers, September 15, 1970, "Handbook of Mechanical Engineering", Vol. 10, FIG. 30 to FIG. 32, etc.). Conventionally, as shown in FIG. 7, four reciprocating compression units 101, 102, 103, 104
The multi-stage compression apparatus 100 is arranged so as to reciprocate on the horizontal axis 5.106, and sequentially increases the pressure from the reciprocating compression section 101 to make the reciprocating compression section 104 the final high-pressure compression section. , 940, and the like. In the multi-stage compression apparatus 100, a pair of opposed pistons 51 and 53 are connected to a yoke 1A, and a cross slider 2A provided movably across a shaft 106 in the yoke 1A is a crank pin 3A. And is connected to the crankshaft 4. Further, another pair of opposed pistons 52 and 54 is connected to a yoke 1B arranged at a 90-degree offset from the yoke 1A, and a cross slider 2B is provided movably across the shaft 105 in the yoke 1B. It is connected to a crankshaft 4 via a crankpin 3. When the crankshaft 4 is rotated around the crankshaft 4 by rotating the crankshaft 4 by an electric motor (not shown), the displacement of the crankpin 3 in the direction of the shaft 105 in the yoke 1A is crossed. The slider 2A moves and responds, and the yoke 1A moves in the direction of the shaft 106.
1 and 53 reciprocate only in the direction of the axis 106. On the other hand, in the yoke 1B, the cross slider 2B moves in the direction of the axis 106,
Since the yoke 1B moves in the direction of 5, the pair of pistons 52 and 54 reciprocate only in the direction of the shaft 105. In order to convert the constant revolving motion of the crankshaft 4 into the smooth reciprocating motion of the pistons 51, 52, 53 and 54, the cross slider 2A slides smoothly in the yoke 1A, The cross slider 2B must slide smoothly within the yoke 1B. Therefore, the sliding portion is used after being filled with grease. However, there is a problem that the supply of grease to the sliding portion of the cross slider and the yoke is insufficient because grease is scattered during operation of the multi-stage compression device 100. there were. If the supply of grease to the sliding portion is insufficient, vibration, wear, and the like cannot be suppressed in long-term operation, and reliability is reduced. SUMMARY OF THE INVENTION An object of the present invention is to suppress vibration, wear, and the like by enabling grease to be supplied to a sliding portion of a cross slider and a yoke of a multistage compression device that compresses a required gas such as nitrogen gas to a high pressure in multiple stages. To provide a reliable multi-stage compression device with high reliability. According to the first aspect of the present invention, there is provided at least one or more pairs of opposed pistons, a yoke for fixing the piston, a cross slider for sliding within the yoke, and the like. A multi-stage compression device that is capable of converting the reciprocating motion of the piston from the rotational motion of the crankshaft by a Scotch yoke mechanism, wherein a grease supply through hole is provided from one end of the crankshaft to a crankpin in the yoke. The present invention relates to a multi-stage compression apparatus characterized in that at least one passage connecting the through hole and the inside of the yoke is provided in the crank pin, and the through hole and the passage are filled with grease in advance. FIG. 1 is a block diagram showing an embodiment of the present invention.
This will be described in detail with reference to FIG. FIG. 1 is an explanatory sectional view showing a main part of an embodiment of the multi-stage compression apparatus of the present invention. FIG. 2 is an explanatory longitudinal sectional view of the multi-stage compression apparatus of the present invention shown in FIG. FIG. 3 is an explanatory view showing a grease supply through-hole and a passage penetrating through a crankshaft and a crankpin of the multistage compression apparatus of the present invention shown in FIG. 1. FIG.
6 to 6 are explanatory views showing a grease supply through-hole and a passage penetrating through a crankshaft and a crankpin of another multistage compression device of the present invention. In these figures, the portions indicated by the same reference numerals as those in FIG. 7 are portions having the same functions as those described in the section of the related art, and the description thereof will be omitted within a range not to impair the understanding of the present invention. did. A multistage compression apparatus 1 according to the present invention shown in FIGS.
00A has four reciprocating compression units 101, 102, 103,
104 are arranged so as to reciprocate on orthogonal axes 105 and 106, and the gas compressed in each reciprocating compression section is supplied to pipes 5 to 8.
, The cover 10 is sequentially transferred through the yoke 1A.
And the yoke 1B are fixedly arranged so as to be sandwiched. A grease supply through hole 13 is provided from one end 13A of the crankshaft 4 to the crankpin 3 in the yoke 1A and the yoke 1B.
The configuration is the same as that of the multi-stage compression apparatus 100 shown in FIG. A is an explanatory view showing the yoke 1A in an enlarged manner. Reference numeral 9 denotes an opening provided at the center of the cover 10. As shown in FIG. 2, a motor section 16 is connected below each reciprocating compression section. The motor section 16 includes a stator 19 having a winding 18 and a rotor 20 provided inside the stator 19.
The crankshaft 4 is connected to the center of the shaft in a penetrating state.
The stator 19 is fixedly installed in the inner cylinder 21. Reference numeral 22 denotes a wiring portion, which has a structure in which gas inside the storage container 23 does not go outside from the wiring portion 22. Then, the electric motor 17 of the electric motor section 16 controls the crankshaft 4.
, The yoke 1A and the yoke 1B are mounted between the lower balancer 11 and the upper balancer 12 provided on the crankshaft 4 so that vibrations and the like are suppressed and stable operation is performed. As shown in FIGS. 2 and 3, the yoke 1A is connected to the crankpin 3 from one end 13A of the crankshaft 4.
And a grease supply through-hole 13 is provided in the crank pin 3 in the yoke 1B.
Are provided with a passage 14 communicating the through hole 13 with the inside of the yoke 1A and a passage 15 communicating the through hole 13 with the inside of the yoke 1B. And the multi-stage compression apparatus 100 of the present invention
At the time of assembling and manufacturing A, the inside of the grease supply through hole 13 and the passages 14 to 15 are sufficiently filled with grease, and the sliding parts of the respective cross sliders and the yoke are filled with grease. 12A is a grease stopper. [0013] The multistage compression apparatus 1 of the present invention having such a configuration.
When the operation of 00A is started, the cross slider 2A slides well in the yoke 1A and the cross slider 2B slides well in the yoke 1B by the action of grease filled in the sliding portion of each cross slider and each yoke. I do. And even in the long-term operation, even if the grease filled in the sliding portion becomes insufficient due to scattering or the like,
The grease filled in the grease supply through hole 13 and the like is supplied into the yoke 1A and the yoke 1B through the passages 14 and 15 by centrifugal force, respectively, so that the grease is supplied to the sliding portions of the cross slider and the yoke. Grease supply shortage can be prevented. In this way, the occurrence of vibration, wear and the like can be suppressed, and the reliability is improved. Arrows indicate the flow of grease. FIG. 4A is an explanatory view showing a grease supply through-hole and a passage penetrating through a crankshaft and a crankpin of another multi-stage compression apparatus of the present invention, and FIG.
It is B section explanatory drawing. In the example shown in FIGS. 4A and 4B, a grease supply through hole 13 is provided from one end 13A of the crankshaft 4 to the crankpin 3 in the yoke 1A and the yoke 1B. Have four passages 14 communicating the through holes 13 and the inside of the yoke 1A.
Are radially provided at regular intervals, and four passages 15 communicating the through hole 13 and the inside of the yoke 1B are provided radially at regular intervals. 12A is a grease stopper.
With such a configuration, the grease filled in the grease supply through-hole 13 and the like passes through the four passages 14 and the four passages 15 due to centrifugal force, and the yoke 1A
The grease is satisfactorily supplied to the inside and the yoke 1B, respectively, so that it is possible to prevent insufficient supply of grease to the sliding portion of each cross slider and yoke. In this way, the occurrence of vibration, wear and the like can be suppressed, and the reliability is improved. Arrows indicate the flow of grease. In the example shown in FIG. 5, the crankshaft 4
A grease supply through hole 13 is provided spirally from one end 13A of the yoke 1A and the crank pin 3 in the yoke 1B, and the crank pin 3 has a passage 14 communicating the through hole 13 with the inside of the yoke 1A. A passage 15 is provided to communicate between the through hole 13 and the inside of the yoke 1B. 12A is a grease stopper. With such a configuration, the grease filled in the grease supply through hole 13 or the like can be removed by the centrifugal force.
And the passage 15 and the yoke 1A and the yoke 1B are satisfactorily supplied into the yoke 1A and the yoke 1B respectively. In this way, the occurrence of vibration and wear can be suppressed,
Reliability is improved. Arrows indicate the flow of grease. In the example shown in FIG. 6, the crankshaft 4
A grease supply through-hole 13 is provided in the crank pin 3 in the yoke 1A and the yoke 1B from one end 13A of the yoke 1A. The crank pin 3 has a through hole 13 and a yoke 1.
A groove 14 </ b> A is provided on the surface of the crankpin 3 in communication with the passage 14 and the passage 14.
The crankpin 3 has a passage 15 communicating the through hole 13 and the inside of the yoke 1B, and a groove 15A provided on the surface of the crankpin 3 in connection with the passage 15. 12A
Is grease stop. The grease filled in the through hole 13 and the like passes through the passages 14 and 15 and the grooves 14A and 15A.
Is supplied into the yokes 1A and 1B. With such a configuration, the grease filled in the grease supply through hole 13 and the like can be removed by centrifugal force.
4, since it is supplied well into the yoke 1A and the yoke 1B via the passage 15, the groove 14A, and the groove 15A, respectively.
Insufficient supply of grease to the sliding portions of each cross slider and yoke can be prevented. In this way, the occurrence of vibration, wear and the like can be suppressed, and the reliability is improved. Arrows indicate the flow of grease. Since the present invention is not limited to the above embodiment, various modifications can be made without departing from the spirit of the appended claims. For example, a multistage compression device having a configuration in which a plurality of reciprocating compression units are arranged in the above-described semi-star type , star type, counterbalance type, or the like may be used. According to the present invention, a grease supply through hole is provided from one end of the crankshaft to a crank pin in the yoke, and at least one passage communicating the through hole with the inside of the yoke is provided. The multi-stage compression device of the present invention, which is pre-filled with grease, can supply grease previously filled in the grease supply through hole to the sliding portion of the cross slider and the yoke by centrifugal force, so that vibration, abrasion, etc. can be suppressed. High reliability. When the grease previously filled in the grease supply through hole or the like runs out, it can be refilled and replenished at the time of maintenance or inspection.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an explanatory view showing a cross section of an embodiment of a multistage compression apparatus of the present invention. FIG. 2 is an explanatory view showing a longitudinal section of the multistage compression apparatus of the present invention shown in FIG. FIG. 3 is an explanatory view showing grease supply through holes and passages passing through a crankshaft and a crankpin of the multistage compression device of the present invention shown in FIG. 1; FIG. 4A is an explanatory view showing a grease supply through hole and a passage penetrating a crankshaft and a crankpin of another multistage compression device of the present invention, and FIG. 4B is a sectional view taken along line BB. is there. FIG. 5 is an explanatory view showing a grease supply through-hole and a passage penetrating a crankshaft and a crankpin of another multistage compression device of the present invention. FIG. 6 is an explanatory view showing a grease supply through-hole and a passage penetrating a crankshaft and a crankpin of another multistage compression device of the present invention. FIG. 7 is an explanatory sectional view of a conventional multistage compression apparatus. DESCRIPTION OF SYMBOLS 100, 100A Multistage compressor 101 Reciprocating compressor 102 Reciprocating compressor 103 Reciprocating compressor 104 Reciprocating compressor 105, 106 Shafts 1A, 1B Yoke 2A, 2B Cross sliders 51-54 Piston 3 Crank pin 4 Crankshaft 13 Grease supply through holes 14, 15 passage

Continued on the front page. (72) Makoto Ma, Inventor 2-5-5-Keihanhondori, Moriguchi-shi, Osaka Sanyo Electric Co., Ltd. (72) Kazuya Sato 2-5-5-1 Keihanhondori, Moriguchi-shi, Osaka Sanyo Inside Electric Co., Ltd. (72) Inventor Yasuo Sakamoto 2-5-5-Keihanhondori, Moriguchi-shi, Osaka Sanyo Electric Co., Ltd. (56) References JP-A-10-274155 (JP, A) JP-A-10- 89255 (JP, A) JP-A-10-103238 (JP, A) JP-A-10-61491 (JP, A) JP-A 62-154371 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) F04B 35/01 F04B 27/02 F04B 37/12 F25B 9/00 F04B 39/00 107 F04B 35/01

Claims (1)

(57) [Claim 1] At least one pair of opposed pistons, a yoke for fixing the piston, a cross slider that slides in the yoke, and the like are provided. A multi-stage compression device capable of converting a rotational movement of a crankshaft by a scotch yoke mechanism, wherein a grease supply through-hole is provided from one end of the crankshaft to a crankpin in the yoke, and the crankpin is provided with the through-hole and the yoke. A multi-stage compression apparatus, wherein at least one passage communicating with the inside is provided, and the through-hole and the passage are filled with grease in advance.