Sealing type screw air compressor shell

Abstract

The utility model discloses a sealed screw air compressor shell, which comprises a main shell, a machine head shell and an end shell which are respectively locked and connected at two ends of the main shell, and further comprises a sealing ring, one of the main shell and the machine head shell and one of the main shell and the end shell are respectively provided with a groove, each groove comprises a bottom groove and an open groove which are communicated with each other, and the bottom groove and the open groove are communicated with each other. The width of the opening groove is smaller than that of the bottom groove, the sealing ring is embedded into the bottom groove, and part of the sealing ring extends out of the opening groove and is blocked by the opening groove. The sealing ring is positioned through the structure that the groove is in the closed-up shape, no matter which part the groove and the sealing ring are formed on, the sealing ring cannot move or lose position, installation can be carried out more conveniently to achieve the sealing effect, and the structure is simpler and more durable.

Description

Technical Field

[0001] This utility model relates to the technical field of screw air compressor devices, and in particular to a sealed screw air compressor housing. Background Technology

[0002] An air compressor is a device that compresses gas, converting the mechanical energy of an electric motor into the pressure energy of gas. Screw air compressors utilize pre-assembled screw-type air compressors, providing high-quality compressed air to various industries due to their high efficiency and high performance. Their working principle mainly consists of three processes: intake, compression, and exhaust. Because screw air compressors generate gas pressure energy, their casings require excellent sealing performance.

[0003] In the prior art, sealing after connection is generally ensured by creating an embedding groove at the housing connection and inserting a sealing ring. However, after the sealing ring is inserted into the embedding groove, if the positioning of the sealing ring in the embedding groove is unstable during the assembly and docking of various components, the sealing ring may fall out of the embedding groove, affecting normal assembly. Moreover, in order to further improve the sealing performance, corresponding mechanisms are added, such as the screw air compressor housing with a sealing mechanism in application number 201821075960.4, which is relatively complex in structure and not conducive to assembly. Utility Model Content

[0004] The purpose of this utility model is to provide a sealed screw air compressor housing. The groove has a constricted structure to position the sealing ring. No matter which part the groove and sealing ring are formed on, the sealing ring will not shift or become misaligned. This makes installation easier and achieves a sealing effect. The structure is also simpler and more durable.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a sealed screw air compressor housing, including a main housing, and a head housing and an end housing respectively locked and connected to both ends of the main housing, and also including a sealing ring. Grooves are provided on one of the main housing and the head housing, and on one of the main housing and the end housing. Each groove includes a connected bottom groove and an opening groove. The width of the opening groove is smaller than the width of the bottom groove. The sealing ring is embedded in the bottom groove and partially extends out of the opening groove and is blocked by the opening groove. When the main housing is connected to the head housing and the end housing, the sealing ring makes interference contact with the main housing and the head housing, and the main housing and the end housing, respectively.

[0006] As a further optimization, sealing plates are formed on both sides of the upper end of the bottom groove, and the opening groove is formed between a pair of sealing plates; part of the sealing ring abuts against the sealing plate, that is, the sealing plate restricts the sealing ring from leaving the groove.

[0007] As a further optimization, the sidewalls of the bottom groove are inclined or curved.

[0008] As a further optimization, the spacing between the pair of sidewalls gradually decreases, and the spacing on the side away from the opening groove is greater than the spacing on the side closer to the opening groove, which can provide a better squeezing effect on the sealing ring.

[0009] As a further optimization, a cut communicating with the groove is also included to facilitate the entry of the tool into the post-processing forming bottom groove.

[0010] As a further optimization, a convex ring is provided on one of the main housing and the head housing, and on the other of the main housing and the end housing. The width of the convex ring is smaller than the width of the opening groove. The convex ring abuts against the sealing ring and is embedded in the groove. The sealing effect is improved by squeezing the sealing ring and forming a misaligned space.

[0011] As a further optimization, the convex ring includes a straight body portion and an arcuate portion portion, the straight body portion being embedded in the opening groove, and the arcuate portion portion extending into the bottom groove.

[0012] As a further optimization, the grooves are formed at both ends of the main housing.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] 1. The groove's constricted shape positions the sealing ring. Regardless of which component the groove and sealing ring are formed on, it will not cause the sealing ring to shift or become misaligned. This makes installation easier and achieves a sealing effect, and the structure is simpler and more durable.

[0015] 2. In one specific embodiment, by cooperating with the convex ring, the groove, and the sealing ring, the sealing ring can be further compressed to ensure an interference fit effect, and the sealing effect is further improved by the misaligned spatial structure. Attached Figure Description

[0016] Figure 1 This is a structural diagram of the present invention.

[0017] Figure 2 This is a structural diagram showing the groove of this utility model located on the head housing.

[0018] Figure 3 for Figure 2 Enlarged view of point A in the middle.

[0019] Figure 4 This is a structural diagram showing the sealing ring of this utility model located within the groove.

[0020] Figure 5 This is a structural diagram showing the sealing ring located in a groove in another embodiment of the present invention.

[0021] Figure 6 This is a structural diagram showing the convex ring located on the main housing in another embodiment of the present invention.

[0022] Figure 7 This is a schematic diagram of the contact between the convex ring and the sealing ring in another embodiment of the present invention. Detailed Implementation

[0023] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0024] like Figures 1 to 4 As shown, a sealed screw air compressor housing includes a main housing 10 and a head housing 20 and an end housing 30 respectively locked and connected to both ends of the main housing 10. Grooves 40 are provided on one of the main housing 10 and the head housing 20, and on one of the main housing 10 and the end housing 30. The groove 40 includes a bottom groove 401 and an opening groove 402 that are connected. The width of the opening groove 402 is smaller than the width of the bottom groove 401. A sealing ring 50 is embedded in the bottom groove 401 and partially extends out of the opening groove 402 and is blocked by the opening groove 402 and cannot be removed from the bottom groove 401. When both ends of the main housing 10 are connected to the head housing 20 and the end housing 30, one sealing ring 50 is in interference fit with the main housing 10 and the head housing 20, and the other sealing ring 50 is in interference fit with the main housing 10 and the end housing 30. It should be noted that the specific internal structure of the main housing 10, the head housing 20 and the end housing 30 in this utility model is not shown. For example, the two through holes on the main housing 10 for inserting screws and other components are not shown. Only the structure at the connection of the main housing 10, the head housing 20 and the end housing 30 for achieving the sealing effect is specifically shown.

[0025] In this invention, for example, a groove 40 is provided on the end face of the head housing 20 that is connected to the main housing 10. The bottom groove 401 and the opening groove 402 of the groove 40 form a constricted structure, that is, the width of the opening groove 402 is smaller than the width of the bottom groove 401. The sealing ring 50 can pass through the opening groove 402 and be embedded in the bottom groove 401 after being squeezed by the elasticity of its body. And due to the obstruction of the constricted structure, the sealing ring 50 will not fall out of the bottom groove 401, thereby reliably positioning the sealing ring 50 in the groove 40. The part of the sealing ring 50 that protrudes from the opening groove 402 (i.e. protrudes from the groove 40) can abut against the main housing 10 and have a sealing effect after being squeezed. Based on the above configuration, the main housing 10 and the sealing ring 50 can function in two different ways. The first way is that the main housing 10 does not have an auxiliary groove; that is, the end face of the main housing 10 connected to the head housing 20 is a planar structure. The planar structure of the main housing 10's end face compresses the sealing ring 50, causing it to deform entirely within the groove 40. The reaction force of the inner wall of the groove 40 on the sealing ring 50, along with the deformation recovery ability of the sealing ring 50 itself, ensures that the sealing ring 50 always maintains an interference fit with the main housing 10, achieving a sealing effect. The second way is that the main housing 10 has an auxiliary groove. The auxiliary groove is smaller than the groove 40, meaning it can accommodate the portion of the sealing ring 50 that protrudes from the groove 40. However, when this portion is embedded in the auxiliary groove, the inner wall of the auxiliary groove also compresses it, creating an interference fit. Therefore, the sealing ring 50 simultaneously interferes with both the groove 40 and the auxiliary groove, and it is located between them, achieving a sealing effect. Of the two methods described above, the first method eliminates the step of machining the auxiliary groove, which can improve the machining efficiency of the main housing 10. The second method can achieve a better sealing effect. However, in both methods, the sealing ring 50 can be positioned by the constricted structure of the groove 40 during assembly. Regardless of which component the groove 40 and the sealing ring 50 are formed on, the sealing ring 50 will not shift or become displaced due to hoisting, docking, or other processes, making installation and sealing more convenient. Similarly, another groove 40 can be provided on the end face of the end shell 30 that connects to the main housing 10. The sealing ring 50 is placed in this groove 40 and abuts against the main housing 10 to achieve the same function and sealing effect.

[0026] like Figure 5 As shown, in another embodiment of the present invention, in order to further ensure the stability of the sealing ring 50 located in the groove 40, sealing plates 42 are respectively formed on both sides of the upper end of the bottom groove 401, and an opening groove 402 is formed between the pair of sealing plates 42, and part of the sealing ring 50 abuts against the sealing plate 42.

[0027] The sidewalls 41 of the bottom groove 401 are inclined or arc-shaped. Preferably, the distance between a pair of sidewalls 41 gradually decreases, and the distance on the side away from the opening groove 402 is greater than the distance on the side closer to the opening groove 402. The pair of sidewalls 41 with inclined or narrowed structures can better form an interference fit with the sealing ring 50 by reducing the distance between them, thus ensuring the sealing effect.

[0028] In addition, a cutout 40a communicating with the groove 40 is provided on the side of the groove 40. Since the groove 40 has a constricted structure, that is, it is wider inside and narrower outside, and the groove 40 itself has a narrow gap in order to adapt to the shape of the sealing ring 50, when processing the groove 40 of this utility model, it is necessary to replace the tool after changing the tool to form a cutout 40a communicating with the groove on the side of the groove, so that the tool can enter the side wall of the groove. Then, the side wall of the groove is removed by the transverse movement of the tool driven by the CNC machine tool, thereby forming a bottom groove 41 with a large internal space and its side wall 41, and forming a sealing plate 42 that forms the opening groove 402.

[0029] Combination Figure 6 and Figure 7 As shown, in another embodiment of this utility model, when grooves 40 are formed on the head shell 20 and end shell 30 respectively to accommodate the sealing ring 50, to improve the sealing effect, convex rings 60 are formed on both ends of the main shell 10 respectively. The width of the convex ring 60 is smaller than the width of the opening groove 402, and it can extend into the opening groove 402. When sealing is achieved, the convex ring 60 abuts against the sealing ring 50 and is embedded in the groove 40. On the one hand, the convex ring 60 can further compress the sealing ring 50, and on the other hand, the main shell 10 is at least partially embedded in the groove 40. Both aspects are conducive to forming a better sealing effect. The forming of the convex ring 60 can be carried out in various ways. For example, when the main shell 10, head shell 20 and end shell 30 are cast, a pre-made groove can be formed in a sand mold (assembled from an upper sand mold and a lower sand mold). The structure of the pre-made groove is the same as that of the convex ring and is used to form the convex ring 60.

[0030] Preferably, the convex ring 60 includes a straight portion 61 and an arcuate portion 62. The straight portion 61 is embedded in the opening groove 402, and the arcuate portion 62 extends into the bottom groove 401. The straight portion 61 can occupy the space provided by the opening groove 402, so that the compressed sealing ring 50 can be moved away from the sealing plate 42, avoiding the damage to the structure of the sealing ring 50 caused by any burrs that may be present on the sealing plate 42 (which cannot be chamfered due to machining).

[0031] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

Claims

1. A sealed screw air compressor housing, comprising a main housing, and a head housing and an end housing respectively locked and connected to both ends of the main housing, characterized in that, It also includes a sealing ring. Grooves are provided on one of the main housing and the head housing, and on one of the main housing and the end housing. The groove includes a bottom groove and an opening groove that are connected. The width of the opening groove is smaller than the width of the bottom groove. The sealing ring is embedded in the bottom groove and partially extends out of the opening groove and is blocked by the opening groove. When the main housing is connected to the head housing and the end housing, the sealing ring is in interference fit with the main housing and the head housing, and the main housing and the end housing, respectively.

2. The sealed screw air compressor housing according to claim 1, characterized in that, The upper end of the bottom groove is formed with sealing plates on both sides, and the opening groove is formed between a pair of sealing plates; the sealing ring abuts against the sealing plates.

3. The sealed screw air compressor housing according to claim 1 or 2, characterized in that, The sidewalls of the bottom groove are inclined or curved.

4. The sealed screw air compressor housing according to claim 3, characterized in that, The spacing between the pair of sidewalls gradually decreases, and the spacing on the side away from the opening slot is greater than the spacing on the side closer to the opening slot.

5. The sealed screw air compressor housing according to claim 1, characterized in that, It also includes a cut that communicates with the groove.

6. The sealed screw air compressor housing according to claim 1, characterized in that, A protruding ring is provided on one of the main housing and the head housing, and on the other of the main housing and the end housing. The width of the protruding ring is smaller than the width of the opening groove. The protruding ring abuts against the sealing ring and is embedded in the groove.

7. The sealed screw air compressor housing according to claim 6, characterized in that, The convex ring includes a straight body portion and an arcuate portion portion, the straight body portion being embedded in the opening groove, and the arcuate portion portion extending into the bottom groove.

8. The sealed screw air compressor housing according to claim 1 or 6, characterized in that, The grooves are formed at both ends of the main housing.

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