Two-stage bearing housing for two-stage screw air compressor

Abstract

The utility model discloses a two -stage bearing seat for two -stage screw air compressor, and the rear side of bearing seat main part is casing connecting surface, and the lower part of bearing seat main part inside is provided with the air outlet channel, and the one side of bearing seat main part is provided with the air outlet, and the air outlet and casing connecting surface are integral structure, and the air outlet channel and air outlet intercommunication, and the periphery of bearing seat main part one end at casing connecting surface is provided with a plurality of connecting holes, and the inside of air outlet is provided with counterbore close to the one side of casing connecting surface, and counterbore and casing connecting surface outside intercommunication, and the cover plate connecting surface is provided with a plurality of first screw holes, and the one side of cover plate connecting surface is provided with extension boss, and extension boss is provided with second screw hole, and second screw hole penetrates in the lateral wall of air outlet, and second screw hole and counterbore are located same axis, and the utility model discloses reasonable structure, and the integral type structure of air outlet and the casing connecting surface of bearing seat main part is shorter than the overall length of traditional air outlet and casing connecting surface separation type structure, and is more space -saving.

Description

Technical Field

[0001] This utility model relates to the technical field of air compressor bearing housings, specifically a two-stage bearing housing for a two-stage screw air compressor. Background Technology

[0002] A two-stage compressor is a mechanical device that compresses gas stage by stage through low-pressure and high-pressure cylinders. Its structural design effectively reduces the single-stage compression ratio and exhaust temperature. This equipment is widely used in the field of air compression in industrial production.

[0003] A two-stage screw air compressor has a primary bearing housing and a secondary bearing housing installed at one end. The secondary bearing housing has an air outlet on one side. Currently, the air outlet on the secondary bearing housing side generally leaves a certain gap with the housing connection surface of the secondary bearing housing. This allows the housing connection surface of the secondary bearing housing to be connected to the housing of the two-stage screw air compressor by bolts even when the housing connection surface is located at the air outlet. However, this structure results in a longer length of the entire secondary bearing housing, thus increasing the space occupied. Therefore, an improved technology is urgently needed to solve this problem existing in the current technology. Utility Model Content

[0004] The purpose of this invention is to provide a two-stage bearing housing for a two-stage screw air compressor, in order to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a two-stage bearing housing for a two-stage screw air compressor, comprising a bearing housing body, a bearing mounting cavity formed at the upper part of the outer end of the bearing housing body, a cover plate connecting surface at the outer end of the bearing housing body located outside the bearing mounting cavity, a housing connecting surface at the end of the bearing housing body away from the cover plate connecting surface, an air outlet channel formed at the end of the bearing housing body away from the bearing mounting cavity and below the bearing mounting cavity, an air outlet provided on one side of the bearing housing body, the air outlet being integrally connected to the near-housing connecting surface, the air outlet channel communicating with the air outlet, and the outer end of the bearing housing body located at the end of the housing connecting surface... The enclosure is provided with several connecting holes. A countersunk hole is provided inside the air outlet near the housing connecting surface. The countersunk hole communicates with the outside of the housing connecting surface. A number of first screw holes are provided on the connecting surface of the cover plate. An extension boss is provided on one side of the connecting surface of the cover plate. The extension boss has a second screw hole. The second screw hole passes through the side wall of the air outlet. The second screw hole and the countersunk hole are located on the same axis. A protrusion is provided on one side of the bearing housing body located in the bearing mounting cavity. An oil passage is provided in the protrusion. A groove is provided on the inner wall of the bearing mounting cavity. The groove communicates with one end of the oil passage. The other end of the oil passage extends to the outside of the bearing housing body away from the bearing mounting cavity.

[0006] Preferably, the present invention provides a two-stage bearing housing for a two-stage screw air compressor, wherein two bearing mounting grooves are formed in the bearing mounting cavity.

[0007] Preferably, the present invention provides a two-stage bearing housing for a two-stage screw air compressor, wherein the bottom of the bearing housing body is provided with several fixed seats.

[0008] Preferably, the present invention provides a two-stage bearing housing for a two-stage screw air compressor, wherein the bearing housing body is provided with reinforcing ribs on the periphery of the bearing mounting cavity.

[0009] Compared with the prior art, the beneficial effects of this utility model are:

[0010] (1) The air outlet and the housing connection surface are connected as an integral structure. A countersunk hole is provided inside the air outlet and near the housing connection surface. An extension boss is provided on the outside of the air outlet and coaxial with the countersunk hole. A second screw hole is provided at the extension boss to facilitate the tool to pass through the second screw hole to screw the bolt at the countersunk hole. On the one hand, it is convenient to operate. The air outlet can also be connected to the housing of the two-stage screw air compressor through the cooperation of the countersunk hole and the bolt, ensuring the connection between the secondary bearing seat and the compressor housing. On the other hand, the integral structure of the air outlet and the housing connection surface of the bearing seat body is shorter in overall length than the traditional separate structure of the air outlet and the housing connection surface, which saves more space.

[0011] (2) The single oil passage structure makes the processing simpler. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of this utility model;

[0013] Figure 2 For the appendix Figure 1 Schematic diagram of the angle transformation structure;

[0014] Figure 3 For the appendix Figure 2 Schematic diagram of the angle transformation structure;

[0015] Figure 4 This is a front view structural diagram of the present invention;

[0016] Figure 5 This is a schematic diagram of the structure of this utility model from below;

[0017] Figure 6 This is a top view of the structure of this utility model.

[0018] In the figure: 1. Bearing housing body; 2. Bearing mounting cavity; 3. Cover plate connecting surface; 4. Housing connecting surface; 5. Air outlet; 6. Connecting hole; 7. Countersunk hole; 8. First screw hole; 9. Extension boss; 10. Second screw hole; 11. Protrusion; 12. Oil passage; 13. Groove; 14. Bearing mounting groove; 15. Fixing seat; 16. Reinforcing rib; 17. Detailed Implementation

[0019] The technical solution of this utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0020] It should be noted that in the description of this utility model, the terms "inner", "outer", "upper", "lower", "both sides", "one end", "the other end", "left", "right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0021] Please see Figure 1-6This utility model provides a technical solution: a two-stage bearing housing for a two-stage screw air compressor, comprising a bearing housing body 1, a bearing mounting cavity 2 formed at the upper part of the outer end of the bearing housing body 1, and two bearing mounting grooves 15 formed in the bearing mounting cavity 2 for mounting two bearings respectively. These two bearings cooperate with the female rotor and the male rotor respectively. The bearing housing body 1 is provided with reinforcing ribs 17 on the periphery of the bearing mounting cavity 2 to ensure the structural strength of the bearing housing body 1 in the bearing mounting cavity 2 and to avoid deformation during long-term operation. The outer end of the bearing housing body 1 in the bearing mounting cavity 2 is a cover plate connecting surface 3, and the end of the bearing housing body 1 away from the cover plate connecting surface 3 is a housing connecting surface 4. An air outlet channel 5 is formed at the end of the bearing housing body 1 away from the bearing mounting cavity 2 and below the bearing mounting cavity 2. An air outlet 6 is provided on one side of the bearing housing body 1. The side of the air outlet 6 near the housing connecting surface 4 is connected to the bearing housing body 1 as an integral structure. The air outlet channel 5 and the air outlet are connected as an integral structure. The bearing housing body 1 is interconnected with the outer periphery of the housing connecting surface 4 at one end. A countersunk hole 8 is provided inside the air outlet 6 near the housing connecting surface 4. The countersunk hole 8 is interconnected with the outer periphery of the housing connecting surface 4. A number of first screw holes 9 are provided on the cover plate connecting surface 3. An extension boss 10 is provided on one side of the cover plate connecting surface 3. A second screw hole 11 is provided on the extension boss 10. The second screw hole 11 penetrates the side wall of the air outlet 6. The second screw hole 11 and the countersunk hole 8 are located on the same axis. A protrusion 12 is provided on one side of the bearing housing body 1 located in the bearing mounting cavity 2. An oil passage 13 is provided in the protrusion 12. A groove 14 is provided on the inner wall of the bearing mounting cavity 2. The groove 14 is interconnected with one end of the oil passage 13. The other end of the oil passage 13 extends to the outer periphery of the bearing housing body 1 away from the bearing mounting cavity 2. A number of fixing seats 16 are provided at the bottom of the bearing housing body 1 to connect the bottom of the bearing housing body 1 with the external base or foundation to fix the bearing housing body 1.

[0022] Installation method and operating principle: The bearing housing body 1 is manufactured by sand casting. Two bearing mounting grooves 15 are pre-reserved on the outer side of the upper part of the bearing housing body 1, forming bearing mounting cavities 2. A groove 14 is formed on one side of the bearing mounting cavity 2, along with an oil passage 13. One end of the oil passage 13 communicates with the groove 14. When the bearing housing body 1 is connected to the housing of the two-stage screw air compressor, the other end of the oil passage 13 communicates with the oil passage 13 inside the housing of the two-stage screw air compressor. A countersunk hole 8 is pre-reserved at the air outlet 6 of the bearing housing body 1. One end of the countersunk hole 8 communicates with the outside of the housing connection surface 4. When the bearing housing body 1 is connected to the housing of the two-stage screw air compressor, a bolt is passed through the countersunk hole 8 and tightened to the connection surface of the housing of the two-stage screw air compressor. Before use, install the bearings into the bearing mounting slot 15, connect one end of the female rotor and the male rotor to the two bearings respectively, and fasten the bearing cover plate to the first screw hole 9 of the connecting surface 3 of the outer end cover plate of the bearing mounting cavity 2 with bolts. One of the bolts is fastened to the second screw hole 11 of the boss, completing the preparation work. During use, the two-stage female rotor and the male rotor inside the two-stage screw air compressor perform two compressions, and the finally compressed air is ejected from the air outlet 6. This utility model has a reasonable structure. The air outlet 6 and the housing connection surface 4 are connected as an integral structure. A countersunk hole 8 is provided inside the air outlet 6 and near the housing connection surface 4. An extension boss 10 is provided on the outside of the air outlet 6 and coaxially with the countersunk hole 8. A second screw hole 11 is provided at the extension boss 10, which facilitates the tool to pass through the second screw hole 11 to screw the bolt at the countersunk hole 8. On the one hand, it is easy to operate. The air outlet 6 can also be connected to the housing of the two-stage screw air compressor through the cooperation of the countersunk hole 8 and the bolt, ensuring the connection between the secondary bearing seat and the compressor housing. On the other hand, the integral structure of the air outlet 6 and the housing connection surface 4 of the bearing seat body 1 is shorter in overall length than the traditional separate structure of the air outlet and the housing connection surface, which saves more space. The single oil passage structure makes the processing simpler.

[0023] Any aspects of this utility model not described in detail are well-known technologies to those skilled in the art.

[0024] Finally, it should be noted that the above specific embodiments are only used to illustrate the technical solution of this utility model and not to limit it. Although this utility model has been described in detail with reference to the embodiments, those skilled in the art should understand that modifications and equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications and substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A two-stage bearing housing for a two-stage screw air compressor, characterized in that: The bearing housing includes a bearing housing body (1), with a bearing mounting cavity (2) at the upper part of the outer end of the bearing housing body (1). The outer end of the bearing housing body (1) located outside the bearing mounting cavity (2) is a cover plate connecting surface (3). The end of the bearing housing body (1) away from the cover plate connecting surface (3) is a housing connecting surface (4). An air outlet channel (5) is provided at the end of the bearing housing body (1) away from the bearing mounting cavity (2) and below the bearing mounting cavity (2). An air outlet (6) is provided on one side of the bearing housing body (1). The air outlet (6) is connected to the housing connecting surface (4) as an integral structure. The air outlet channel (5) and the air outlet (6) are interconnected. Several connecting holes (7) are provided on the periphery of the end of the bearing housing body (1) located on the housing connecting surface (4). An air outlet (6) is provided inside the side of the air outlet (6) near the housing connecting surface (4). There is a countersunk hole (8), which is connected to the outside of the housing connecting surface (4). The cover plate connecting surface (3) is provided with several first screw holes (9). An extension boss (10) is provided on one side of the cover plate connecting surface (3). The extension boss (10) is provided with a second screw hole (11). The second screw hole (11) penetrates the side wall of the air outlet (6). The second screw hole (11) and the countersunk hole (8) are located on the same axis. The bearing seat body (1) is provided with a protrusion (12) on one side of the bearing mounting cavity (2). An oil passage (13) is provided in the protrusion (12). A groove (14) is provided on the inner wall of the bearing mounting cavity (2). The groove (14) is connected to one end of the oil passage (13). The other end of the oil passage (13) extends to the outside of the bearing seat body (1) away from the bearing mounting cavity (2).

2. The secondary bearing housing for a two-stage screw air compressor according to claim 1, characterized in that: Two bearing mounting slots (15) are provided inside the bearing mounting cavity (2).

3. The secondary bearing housing for a two-stage screw air compressor according to claim 1, characterized in that: The bearing housing body (1) has several fixed seats (16) at its bottom.

4. The secondary bearing housing for a two-stage screw air compressor according to claim 1, characterized in that: The bearing housing body (1) is provided with reinforcing ribs (17) on the periphery of the bearing mounting cavity (2).

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