JPH04119370U - compressor - Google Patents

Abstract

(57) [Summary] [Purpose] To prevent noise and vibration caused by the discharge valve. [Structure] A disk body 22 extending in the radial direction is attached to the main shaft 12, and the disk body 22 is manually and closely attached to the valve plate 18a so as to partition the discharge hole 20a and the discharge chamber 20. It is located on the discharge chamber 20 side. One hole 22a is formed in the disc body 22. Disc body 2 on main shaft 12
2, when the piston reaches near the top dead center due to the rotation of the main shaft 12, the discharge hole 20a and the disc body 22
The disk body 22 is attached to the main shaft 12 so that the hole portions 22a of the disk body 22 overlap with each other. In other words, in the discharge stroke, the discharge hole 20
The disc body 22 is attached to the main shaft 12 so that a corresponds to the hole 22a.
can be attached to.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

This invention relates to compressors, and in particular can reduce noise when discharging compressed fluid. related to compressors.

0002

[Conventional technology]

Various structures have been known as compressors, but here we will discuss the so-called oblique type. The structure of a compressor will be outlined using a plate compressor as an example. Referring to FIG. 3, the illustrated compressor includes a cylinder block 11 and a main shaft. 12 is supported by a bearing 12a and its rear end is supported by a bearing 12b. It is held and rotatably supported by the cylinder block 11. Crank chamber 13 A swash plate (rotor) 14 is disposed at and connected to the main shaft 12 . rotor 14 A rocking plate 15 is disposed on the inclined surface, and a protrusion 15a is formed in a part of the rocking plate 15. This protrusion 15a is a slider section attached to the cylinder block 11. 11a is held between them.

0003 A piston rod 16a is connected to the rocking plate 15 by a ball connection. A piston 16 is attached to the other end of the connecting rod 16a. cylinder block A cylinder 17 is formed in 11b, and a piston 16 is inserted into the cylinder 17. has been done. Note that the cylinder 17 has multiple cylinders arranged at predetermined angular intervals around the main shaft 12. Therefore, a plurality of piston rods 16a are attached to the rocking plate 15. The pistons 16 attached to these piston rods 16a are attached to each series. This means that it has been inserted into the reader 17.

0004 A cylinder head 18 is attached to the cylinder block 11 via a valve plate 18a. The cylinder head 18 defines a suction chamber 19 and a discharge chamber 20. has been done. The valve plate 18a has a suction hole 19a connecting the suction chamber 19 and the cylinder 17. is formed, and the suction chamber 19 and cylinder 17 communicate through a suction valve (not shown). are doing. Similarly, the valve plate 18a has a discharge port connecting the discharge chamber 20 and the cylinder 17. An exit hole 20a is formed.

[0005] Here, referring also to FIG. 4, the valve plate 18a has a discharge hole that defines opening and closing of the discharge hole 20a. A retainer is provided with a valve 21a and further restricts movement of the discharge valve 21a in the opening direction. 21 is attached.

[0006] Referring again to FIG. 3, when a driving force is applied to the main shaft 12, the rotation of the main shaft 12 causes The rotor 14 rotates. At this time, the protrusion 15a slides along the slider 11a. Since the swing plate 15 rotates, rotation of the swing plate 15 is prevented, and as a result, the swing plate 15 is prevented from rotating due to the rotation of the main shaft. A so-called oscillating motion is performed in response to this. The piston is moved by the rocking motion of the rocking plate 15. The suction hole 16 moves back and forth, thereby causing the suction hole 19 to flow from the suction chamber 19 during the suction stroke. The fluid (gas) sucked into the cylinder 17 through a is compressed in the compression stroke. In the discharge stroke, the compressed gas is discharged into the discharge chamber 20 through the discharge hole 20a.

[0007]

[Problem that the idea aims to solve]

By the way, due to the reciprocating movement of the piston 16, the cylinder internal pressure and the discharge chamber pressure Then, the discharge valve 21a opens and closes. In other words, when discharging compressed gas, the discharge valve 21a open. When the discharge valve 21a is opened, the discharge valve 21a is reset by high pressure compressed gas. On the other hand, when the discharge valve 21a closes, the discharge valve 21a It collides with the valve plate 18a. In other words, the discharge valve 21a is operated on the main shaft in response to the operation of the compressor. The cylinders open and close at multiple times the rotation speed, resulting in noise and noise caused by the above collision. There are problems in that vibrations and vibrations occur. The purpose of this invention is to provide a compressor that does not generate noise or vibration due to the discharge valve. It's about doing.

[0008]

[Means to solve the problem]

According to the present invention, a main shaft, a cylinder block in which a cylinder portion is formed, a piston that reciprocates within the cylinder portion in response to rotational drive of the main shaft; A suction hole and a discharge hole are formed in the valve plate in contact with the cylinder part, and the front The suction stroke, compression stroke, and discharge stroke are performed according to the reciprocating movement of the piston, and the above-mentioned In the suction stroke, fluid is sucked into the cylinder part from the suction hole, and in the discharge stroke, the fluid is sucked into the cylinder part through the suction hole. In a compressor that discharges compressed fluid from a discharge hole into a discharge chamber, a hole is formed. a plate portion disposed to partition the discharge hole and the discharge chamber; The hole portion faces the discharge hole during the discharge stroke of the plate portion about an axis parallel to the A compressor is obtained which is characterized by having a control means for rotationally driving the compressor in accordance with the compressor. . In this case, the control means may control the control means by connecting the plate portion to the main shaft. The plate portion is rotationally driven in synchronization with the rotation of the main shaft.

[0009]

[Effect]

In this invention, the plate part is rotated in synchronization with the main shaft, and the discharge hole and the hole part are connected in the discharge stroke. The compressed gas is discharged from the cylinder into the discharge chamber by matching the In other words, since the discharge valve never collides with the valve plate or retainer, noise and It is possible to completely prevent vibrations and vibrations.

0010

【Example】

The present invention will be explained below with reference to examples. Here, as an example of a compressor, The basic structure of the plate compressor is the same as shown in Figure 3, so we will explain the compressor itself. is omitted. Referring to FIG. 1, here, the main shaft 12 is located at the position of the bearing 12b shown in FIG. The rib also extends further rearward, passing through the valve plate 18a and having its rear end facing the discharge chamber 20. are doing. The main shaft 12 has a shaft extending perpendicularly to the main shaft 12 (i.e., radially). A disk body 22 (extending) is attached (the main shaft 12 and the disk body 22 are, for example, They are joined by press-fitting or bolting, and the main shaft 12 has a non-slip structure as shown in the figure. 12c is formed), and the disc body 22 closes the discharge hole 20a. The valve plate 18a is closely spaced so as to partition the discharge hole 20a and the discharge chamber 20. It is located on the discharge chamber 20 side. Therefore, depending on the rotation of the main shaft 12, the position of the disc body 20 is While the surface slides on the valve plate 18a, the disk body 22 uses the main shaft 12 as the central axis (rotation axis). It will rotate. As shown in FIG. 2, one hole 22a is formed in the disc body 22 as described later. (The hole 22a is preferably a long hole as shown in the figure).

[0011] In FIG. 1, the rear end of the main shaft 12 is supported by a holding member 23 fixed to the valve plate 18a. The other surface of the disc body 22 is pressed by this pressing member 23, and thereby, Shaking such as vibration of the disc body 22 is prevented. The presser member 23 has a discharge hole 20. A communication hole 23a is formed corresponding to a. Note that the other surface of the disc body 22 is a presser part. Needless to say, it slides on the material 23.

0012 By the way, when attaching the disk body 22 to the main shaft 12, due to the rotation of the main shaft 12, When the piston reaches near the top dead center, the discharge hole 20a and the hole 22a of the disc body 22 The disc body 22 is attached to the main shaft 12 so that they overlap. In other words, in the discharge stroke The disk body 22 is attached to the main shaft 12 so that the discharge hole 20a corresponds to the hole 22a. I get kicked.

[0013] By attaching the disc body 22 to the main shaft 12 as described above, the main shaft 1 The disc body 22 rotates in synchronization with the rotation of 20a, the hole 22a, and the communication hole 23a to be discharged into the discharge chamber 20. (If the hole 22a is made into a long hole as described above, the compressed gas will gradually flow through the compression stroke.) ). In this way, by discharging compressed gas, This eliminates the need for a discharge valve and retainer, thereby reducing noise and vibration caused by the discharge valve. It can be prevented. In addition, in this embodiment, connecting the disc body 22 to the main shaft 12 means that the disc body 22 is connected to the main shaft 12. This corresponds to rotational drive control. In other words, it constitutes a control means. In addition, the above-mentioned presser member is not an essential component, and even if the presser member is not provided. Effects similar to those of the embodiment can be obtained. One stroke of suction compression is performed in each cylinder in a chain for each revolution of the main shaft. Therefore, the hole on the disk body faces the discharge hole corresponding to the cylinder that has entered the discharge stroke. Therefore, it is sufficient to have one hole. Furthermore, in the hole Various shapes are possible, and the shape is selected depending on the required change in discharge amount.

[0014]

[Effect of the idea]

As explained above, in this invention, the disc part is rotated in synchronization with the main shaft to discharge During the stroke, the compressed gas is discharged from the cylinder into the discharge chamber by matching the discharge hole with the hole. This eliminates the need for a discharge valve and retainer, reducing noise and noise caused by the discharge valve. This has the effect of completely preventing vibration.

[Brief explanation of drawings]

FIG. 1 is a diagram for explaining an embodiment of a fluid discharge structure of a compressor according to the present invention.

FIG. 2 is a diagram for explaining the position of a hole provided in a disc body in FIG. 1;

FIG. 3 is a diagram showing a swash plate compressor as an example of a compressor.

FIG. 4 is a diagram showing a fluid discharge structure in a conventional compressor.

[Explanation of symbols]

11 Cylinder block 12 Main shaft 13 Crank chamber 14 Swash plate (rotor) 15 Rocking plate 16 Piston 17 cylinder 18 Cylinder head 19 Suction chamber 20 Discharge chamber 21 Retainer 22 Disc body 23 Holding member

Claims (2)

[Scope of utility model registration request] 1. A main shaft, a cylinder block in which a cylinder section is formed, and a piston that reciprocates within the cylinder section in accordance with the rotational drive of the main shaft, and a valve plate in contact with the cylinder section has an inlet valve. A hole and a discharge hole are formed, and according to the reciprocating movement of the piston, the suction stroke,
In a compressor that performs a compression stroke and a discharge stroke, sucks fluid into the cylinder portion from the suction hole in the suction stroke, and discharges compressed fluid from the discharge hole into the discharge chamber in the discharge stroke, the hole portion is formed and arranged to partition the discharge hole and the discharge chamber, the plate portion is moved around an axis parallel to the main axis in the discharge stroke, and the hole corresponds to the discharge hole. A compressor characterized by having a control means for rotationally driving the compressor so as to rotate the compressor. Claim 2: The compressor according to claim 1,
The compressor, wherein the control means connects the plate portion to the main shaft to rotate the plate portion in synchronization with rotation of the main shaft.