TW202007863A - Screw compressor - Google Patents

Abstract

A screw compressor includes a main body, a compression screw and an adjusting component. The main body has a low pressure region, a compression region and a high pressure region. The compression screw is disposed at the compression region and has an air inlet portion and an air outlet portion opposite to each other, wherein the air inlet portion is connected to the low pressure region, and the air outlet portion is connected to the high pressure region. The adjusting component covers a part of the compression screw, wherein an end of the adjusting component has a concave portion and a stopping flange. At least a part of the concave portion is overlapped to the air outlet portion, such that an air outlet opening is formed between the concave portion and the air outlet portion, and the stopping flange leans against the main body to limit the overlapping amount of the concave and the air outlet portion.

Description

Screw compressor

The invention relates to a compressor, and in particular to a screw compressor.

With the development of industrialization, the demand for air conditioners and refrigeration equipment is increasing day by day, and many types of compressors have been developed. In the case of a screw compressor, the screw compresses the gas and covers the adjusting member with the screw. The concave part of the adjusting member corresponds to the exhaust part of the screw, and the volume can be adjusted by changing the size of the concave part ratio. Under this adjustment method, additional mold openings are required to manufacture adjustment parts with recesses of different sizes, which increases manufacturing costs.

The invention provides a screw compressor, which can save the manufacturing cost.

The screw compressor of the present invention includes a main body, a compression screw group and an adjusting member. The main body has a low pressure area, a compression area and a high pressure area. The compression screw group is arranged in the compression area and has an intake portion and an exhaust portion opposite to each other, wherein the intake portion is connected to the low-pressure area, and the exhaust portion is connected to the high-pressure area. The adjusting member covers part of the compression screw set, wherein one end of the adjusting member has a concave portion and a stop flange, at least part of the concave portion overlaps the exhaust portion to form an exhaust port between the concave portion and the exhaust portion, the stop convex The rim abuts the body to limit the amount of overlap between the recess and the exhaust.

In an embodiment of the present invention, the above-mentioned concave portion extends from the end of the adjustment member to the other end of the adjustment member to have a first extension length, and the stop flange extends from the end of the adjustment member to the other end of the adjustment member The second extension length is greater than the second extension length.

In an embodiment of the present invention, the aforementioned adjusting member has a first extension length in an extension direction, and the stop flange has a second extension length along the extension direction, and the extension direction is parallel to the rotation axis of the compression screw set.

In an embodiment of the present invention, the difference between the total length of the adjusting member in the extension direction and the second extension length is smaller than the total length of the compression screw set in the extension direction.

In an embodiment of the invention, the main body has a stop surface, the stop surface is flush with one end of the exhaust portion, and the stop flange abuts the stop surface.

In an embodiment of the invention, the screw compressor described above includes a driving unit, wherein the driving unit is adapted to drive the adjustment member to move, so that the stop flange moves toward the stop surface.

In an embodiment of the invention, the above-mentioned driving unit is adapted to drive the adjustment member to move in a direction parallel to the rotation axis of the compression screw group.

In an embodiment of the invention, the above-mentioned adjusting member has a guide groove, and the main body has a guide convex portion, and the adjusting member is slidably disposed on the guide convex portion through the guide groove.

In an embodiment of the present invention, the above-mentioned compression screw set includes two adjacent screws, and the pair of adjusting members are located at the adjoining positions of the two screws.

In an embodiment of the invention, the above-mentioned concave portion has an open end and a closed end opposite to each other. The open end is located at the end of the adjusting member, and the closed end has a V-shaped profile.

Based on the above, in the screw compressor of the present invention, the stop flange of the adjusting member is used to stop each other with the main body of the compressor to limit the relative position of the adjusting member and the compression screw set, thereby restricting the concave portion of the adjusting member from The amount of overlap of the exhaust parts of the compression screw group makes the screw compressor have the required volume ratio. With this design method, as long as the size of the stop flange of the adjusting member is changed, the volume ratio of the screw compressor can be changed according to requirements to optimize power consumption and exhaust gas. In this way, it is only necessary to grind the stop flanges of different sizes during the existing grinding process of the adjustment member, so that the adjustment member can be adapted to the working environment with different volume ratio requirements, without the need to re The mold is opened to make the adjustment parts with the concave parts of different sizes, so the manufacturing cost can be reduced.

In order to make the above-mentioned features and advantages of the present invention more obvious and understandable, the embodiments are specifically described below in conjunction with the accompanying drawings for detailed description as follows.

FIG. 1 is a perspective view of some components of a screw compressor according to an embodiment of the present invention. FIG. 2 is a schematic side view of the screw compressor of FIG. 1. To make the drawing clear, the housing 116 of FIGS. 1 and 2 is shown in broken lines. Please refer to FIGS. 1 and 2. The screw compressor 100 of this embodiment includes a main body 110 and a compression screw set 120. The main body 110 has a low-pressure region R1, a compression region R2, and a high-pressure region R3. The compression screw group 120 is disposed in the compression region R1 and has an intake portion 122 and an exhaust portion 124 opposite to each other. The intake portion 122 is connected to the low-pressure region R1 and the exhaust portion 124 is connected to the high-pressure region R3. The low-pressure gas input from the air inlet 122 is compressed by the rotation of the compression screw group 120 to form high-pressure gas.

Fig. 3 is a bottom view of the adjusting member of the screw compressor of Fig. 2. Please refer to FIGS. 1 to 3. The screw compressor 100 of this embodiment further includes an adjusting member 130. The adjusting member 130 covers a part of the compression screw set 120, and one end E1 of the adjusting member 130 has a concave portion 132 and a stop flange 134. At least part of the concave portion 132 overlaps the exhaust portion 124 to form an exhaust port O between the concave portion 132 and the exhaust portion 124, and the size of the exhaust port O is related to the volume ratio of the screw compressor 100. The stop flange 134 abuts a casing 116 of the main body 110 to limit the relative position of the adjusting member 130 and the compression screw set 120, thereby limiting the amount of overlap of the recess 132 and the exhaust portion 124, so that the screw compressor 100 has The required volume ratio.

With this design, as long as the size of the stop flange 134 of the adjusting member 130 is changed, the volume ratio of the screw compressor 100 can be changed according to requirements to optimize power consumption and exhaust gas. In this way, it is only necessary to grind the stop flange 134 of different sizes during the existing grinding process of the adjustment member 130, so that the adjustment member 130 can be adapted to the working environment with different volume ratio requirements, and There is no need to re-open the mold to make the adjustment member 130 with the recesses 132 of different sizes, so the manufacturing cost can be reduced.

FIG. 4 illustrates the size change of the stop flange of the adjusting member of FIG. 1. For example, if the screw compressor 100 is to be adjusted to have a different volume ratio, the adjusting member 130 shown in FIG. 1 can be replaced with the adjusting member 130' shown in FIG. 4, and the stop flange of the adjusting member 130' The length of 134' is less than the length of the stop flange 134 of the adjustment member 130 of FIG. 1, so that the recess 132 of the adjustment member 130' overlaps the exhaust portion 124 of the compression screw group 120 by a large amount to achieve the adjustment of the volume ratio effect.

1 and 2, the concave portion 132 of this embodiment extends from the end E1 of the adjustment member 130 to the other end E2 of the adjustment member 130 along an extension direction D parallel to the rotation axes A1 and A2 of the compression screw set. It has a first extension length L1 in the extension direction D, and the stop flange 134 extends from the end E1 of the adjustment member 130 to the other end E2 of the adjustment member 130 along the extension direction D and has a second extension in the extension direction D The length L2, and the first extension length L1 of the recess 132 is greater than the second extension length L2 of the stop flange 134, so that the recess 132 can overlap the compression screw group 120.

In this embodiment, the housing 116 of the main body 110 has a stop surface 112 which is flush with one end E3 of the exhaust portion 124 of the compression screw set 120 and is used for the stop flange 134 to resist by. Moreover, the difference between the total length L3 of the adjusting member 130 in the extension direction D and the second extension length L2 is smaller than the total length L4 of the compression screw group 120 in the extension direction D. Therefore, the compression screw group 120 is exposed by the adjusting member 130 at the intake portion 122 thereof, and the effect of reducing the compression amount of the screw compressor 100 can be achieved.

Referring to FIG. 3, in this embodiment, the concave portion 132 has an open end 132a and a closed end 132b opposite to each other. The open end 132a is located at the end E1 of the adjusting member 130, and the closed end 132b has a V-shaped profile. Fig. 5 is a plan view of the compression screw group of Fig. 1. Please refer to FIG. 1, FIG. 2 and FIG. 5, the compression screw group 120 of this embodiment includes two adjacent screws 120a and 120b. The spiral structure of the two screws 120a and 120b forms a V-shaped profile from the perspective of FIG. The V-shaped profile of the concave portion 132 of the adjusting member 130, which is located adjacent to the two screws 120a and 120b, is used to match the V-shaped profile of the two screws 120a and 120b, so as to accurately control the shape of the two. The volume ratio of the screw compressor 100.

Please refer to FIG. 1. The screw compressor 100 of this embodiment further includes a driving unit 140. The driving unit 140 is used to drive the adjustment member 130 along the extending direction D, so that the stop flange 134 of the adjustment member 130 moves toward the stop surface 112. Move and abut against the stop surface 112. The driving unit 140 is, for example, an appropriate type of actuator, and the present invention is not limited thereto. In addition, the adjusting member 132 of this embodiment has a guide groove 136 as shown in FIG. 1, and the main body 110 has a guide convex portion 114. The adjusting member 130 is slidably disposed on the guide convex portion 114 through the guide groove 136 to borrow Thereby, the sliding relationship moves steadily.

It must be noted here that the screw compressors of other embodiments are listed below for description, wherein the same or similar components will be marked with the same or similar symbols, and the description of the same or similar technical content is omitted. For the description of the omitted parts, reference may be made to the foregoing embodiments, and the following embodiments will not be repeated.

As described in the foregoing embodiment, the compression screw group 120 is exposed by the adjusting member 130 at the intake portion 122 thereof to reduce the compression amount of the screw compressor 100, but the present invention is not limited to this. Give an example of this. 6 is a perspective view of some components of a screw compressor according to another embodiment of the present invention. Please refer to FIG. 6, the screw compressor 100A of this embodiment is substantially similar to the screw compressor 100 of the previous embodiment, the difference between the two is that the total length of the adjusting member 130 ″ in the extending direction D is greater than that of the adjusting member 130 in the extending direction The total length of D, so that the compression screw group 120 is completely covered by the adjusting member 130 at its air inlet 122. The length of the stop flange 134 shown in FIG. 6 is the same as that shown in FIG. 1, but it can also be the same as the figure As shown in 4, the present invention does not limit this.

In summary, in the screw compressor of the present invention, the stop flange of the adjusting member is used to stop each other with the main body of the compressor to limit the relative position of the adjusting member and the compression screw group, thereby restricting the adjustment member The amount of overlap between the recessed portion and the exhaust portion of the compression screw set allows the screw compressor to have the required volume ratio. With this design method, as long as the size of the stop flange of the adjusting member is changed, the volume ratio of the screw compressor can be changed according to requirements to optimize power consumption and exhaust gas. In this way, it is only necessary to grind the stop flanges of different sizes during the existing grinding process of the adjustment member, so that the adjustment member can be adapted to the working environment with different volume ratio requirements, without the need to re The mold is opened to make the adjustment parts with the concave parts of different sizes, so the manufacturing cost can be reduced.

Although the present invention has been disclosed as above with examples, it is not intended to limit the present invention. Any person with ordinary knowledge in the technical field can make some changes and modifications without departing from the spirit and scope of the present invention. The scope of protection of the present invention shall be subject to the scope defined in the appended patent application.

100, 100A ‧ ‧ ‧ screw compressor 110 ‧ ‧ ‧ main body 112 ‧ ‧ ‧ stop surface 114 ‧ ‧ ‧ guide convex part 116 ‧ ‧ ‧ housing 120 ‧ ‧ ‧ compression screw group 120a, 120b ‧ ‧ ‧ screw 122‧‧‧ Intake part 124‧‧‧Exhaust part 130, 130', 130''‧‧‧Adjustment 132‧‧‧Concave part 132a‧‧‧Open end 132b‧‧‧Closed end 134,134′‧‧ ‧Stop flange 136‧‧‧Guide groove 140‧‧‧Drive unit A1, A2‧‧‧Rotary axis D‧‧‧ Extension direction E1, E2, E3‧‧‧End L1‧‧‧First extension length L2 ‧‧‧Second extension length L3, L4‧‧‧ Total length O‧‧‧Exhaust port R1‧‧‧Low pressure area R2‧‧‧Compression area R3‧‧‧High pressure area

FIG. 1 is a perspective view of some components of a screw compressor according to an embodiment of the present invention. FIG. 2 is a schematic side view of the screw compressor of FIG. 1. Fig. 3 is a bottom view of the adjusting member of the screw compressor of Fig. 2. FIG. 4 illustrates the size change of the stop flange of the adjusting member of FIG. 1. Fig. 5 is a plan view of the compression screw group of Fig. 1. 6 is a perspective view of some components of a screw compressor according to another embodiment of the present invention.

100‧‧‧screw compressor

110‧‧‧Main

112‧‧‧stop surface

114‧‧‧Guided convex part

116‧‧‧Housing

120‧‧‧Compression screw set

120a, 120b‧‧‧screw

122‧‧‧Air intake

124‧‧‧Exhaust Department

130‧‧‧Adjustment

132‧‧‧recess

134‧‧‧stop flange

136‧‧‧Guide groove

A1, A2‧‧‧rotational axis

E1, E2, E3 ‧‧‧ end

O‧‧‧Exhaust

R1‧‧‧Low pressure area

R2‧‧‧Compression area

R3‧‧‧High pressure area

Claims (10)

A screw compressor includes: a main body having a low-pressure area, a compression area and a high-pressure area; a compression screw set disposed in the compression area and having an intake portion and an exhaust portion opposed to each other, wherein the The intake part is connected to the low-pressure region, and the exhaust part is connected to the high-pressure region; and an adjusting member covering part of the compression screw set, wherein one end of the adjusting member has a recess and a stop flange, at least part of the recess Overlap the exhaust portion to form an exhaust port between the recess and the exhaust portion, and the stop flange abuts the body to limit the amount of overlap between the recess and the exhaust portion. The screw compressor as described in item 1 of the patent application range, wherein the recess extends from the end of the adjusting member to the other end of the adjusting member to have a first extension length, and the stop flange is adjusted from the The end of the member extends toward the other end of the adjustment member to have a second extension length, the first extension length is greater than the second extension length. The screw compressor as described in item 2 of the patent application range, wherein the adjusting member has the first extension length in an extension direction, and the stop flange has the second extension length along the extension direction, the extension direction Parallel to the axis of rotation of the compression screw set. The screw compressor as described in item 3 of the patent application range, wherein the difference between the total length of the adjusting member in the extension direction and the second extension length is smaller than the total length of the compression screw set in the extension direction. The screw compressor as described in item 1 of the patent application range, wherein the main body has a stop surface, the stop surface is flush with one end of the exhaust portion, and the stop flange abuts against the stop surface. The screw compressor as described in item 5 of the patent application includes a driving unit, wherein the driving unit is adapted to drive the adjustment member to move, so that the stop flange moves toward the stop surface. The screw compressor as described in item 6 of the patent application range, wherein the drive unit is adapted to drive the adjustment member to move in a direction parallel to the rotation axis of the compression screw group. The screw compressor as described in item 1 of the patent application range, wherein the adjusting member has a guide groove, the main body has a guide convex portion, and the adjusting member is slidably disposed on the guide convex portion by the guide groove . The screw compressor as described in item 1 of the scope of the patent application, wherein the compression screw set includes two adjacent screws, and the pair of adjusting members are located adjacent to the two screws. The screw compressor as described in item 1 of the patent application range, wherein the concave portion has an open end and a closed end opposite to each other, the open end is located at the end of the adjusting member, and the closed end has a V-shaped profile.

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