Screw compressor with open-type structure

Abstract

The utility model relates to a screw compressor with an open-type structure, a compressor shell is a casting part, one side of the compressor shell is provided with a hole for the shaft end of a male screw rotor to pass through, the male screw rotor and a female screw rotor are respectively and rotatably arranged in the compressor shell, are arranged up and down and are meshed with each other; one shaft end of the male screw rotor penetrates through a hole in the compressor shell and extends to the outside of the compressor shell, and a coupler is installed at the shaft end, extending to the outside of the compressor shell, of the male screw rotor. According to the compressor, one end of the male screw rotor is led out of the compressor shell, the coupler is assembled, the male screw rotor can be connected with output shafts of motors of various models through the coupler, the universal adaptability is high, the reliability and stability of connection can be improved through connection of the coupler, and therefore the performance of the whole compressor is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to screw compressor technical field, concretely is a screw compressor of open structure. BACKGROUND

[0002] The open screw compressor is a kind of refrigeration equipment, is widely used in industry and commercial field.It adopts the compression mode of screw, and the refrigerant is compressed by the rotation of two intermeshing screw rotors, so as to realize the refrigeration effect.The open screw compressor has the advantages of simple structure, high reliability and high efficiency, and is widely used in air conditioning system, refrigeration and freezing equipment, chemical refrigeration and other fields.

[0003] The traditional open screw compressor and the semi-closed screw compressor have great difference in structural design, and the parts cannot be used universally, which increases the development and production cost, and also complicates the inventory management of parts.In addition, the existing open screw compressor usually adopts flange connection or direct mechanical connection at the suction end, which not only has poor universality, but also may have problems of unstable connection and easy loosening and wear in long-term operation, affecting the performance and reliability of the compressor. SUMMARY

[0004] The utility model aims at providing a kind of open structure's screw compressor, effectively solve the problem raised in the above background technology.

[0005] To achieve the above object, the utility model provides the following technical scheme.

[0006] An open structure's screw compressor, including compressor shell, male screw rotor and female screw rotor, the compressor shell is a cast part, one side of the compressor shell is provided with the hole for the male screw rotor shaft end to pass through, the male screw rotor and the female screw rotor are rotatably installed in the compressor shell, and are arranged above and below and intermeshed, one shaft end of the male screw rotor extends to the outside of the compressor shell through the hole on the compressor shell, and a shaft end of the male screw rotor extending to the outside of the compressor shell is provided with a shaft coupling.

[0007] Therefore, the open structure's screw compressor can be connected with the output shaft of various models of motor by the shaft coupling installed on the male screw rotor, has high universal adaptability, and the reliability and stability of connection can be improved by the shaft coupling, so as to improve the performance of the whole compressor.

[0008] Most of the parts in the open structure's screw compressor are universal with the parts in the semi-closed compressor, the existing production line and inventory can be effectively utilized, the production process is more efficient, the investment of new equipment and the time cost of production adjustment are reduced, the development cost is reduced, and the universalization of product parts is improved.

[0009] Preferably, a mechanical seal is arranged between the male screw rotor and the hole through which the male screw rotor is led to the outside of the compressor housing.

[0010] Preferably, the compressor housing is sequentially provided with a first cylindrical bearing, a second cylindrical bearing and a first spherical bearing, one axial end of the male screw rotor is matched and inserted into the first cylindrical bearing, and the other axial end is sequentially matched and inserted into the second cylindrical bearing and the first spherical bearing.

[0011] Preferably, a male rotor positioning sleeve is arranged in the compressor housing away from the side of the coupling, and one end of the male screw rotor away from the coupling is matched and inserted into the male rotor positioning sleeve.

[0012] Preferably, the compressor housing is sequentially provided with a third cylindrical bearing, a fourth cylindrical bearing and a second spherical bearing above the male screw rotor, one axial end of the female screw rotor is matched and inserted into the third cylindrical bearing, and the other axial end is sequentially matched and inserted into the fourth cylindrical bearing and the second spherical bearing.

[0013] Preferably, a female rotor positioning sleeve is arranged in the compressor housing above the male rotor positioning sleeve, and one end of the female screw rotor away from the coupling is matched and inserted into the female rotor positioning sleeve.

[0014] Compared with the prior art, the screw compressor has the following beneficial effects.

[0015] The screw compressor with the open structure has one end of the male screw rotor led to the outside of the compressor housing and assembled with the coupling, the coupling can be connected with output shafts of various types of motors, has high universal adaptability, and can improve the reliability and stability of the connection through the coupling connection, thereby improving the performance of the entire compressor.

[0016] Most of the parts in the screw compressor with the open structure are universal with the parts in the semi-closed compressor, the existing production line and inventory can be effectively utilized, the production process is more efficient, the investment in new equipment and the time cost of production adjustment are reduced, the development cost is reduced, and the universalization of product parts is improved.

[0017] The ball bearing is used for processing radial load and ensuring stable rotation of the rotor, and the cylindrical bearing is used for processing axial load, such as thrust in the compression process, and provides comprehensive support and protection, so that the load bearing capacity of the two rotors in the radial and axial directions can be optimized respectively, and the stability and efficiency of the overall operation of the compressor are effectively improved.

[0018] The utility model discloses a positioning sleeve is arranged respectively at one axle end of two rotors, ensures the position accuracy of rotor in axial and radial, prevents axial movement, provides support to scatter the stress and vibration produced when operating simultaneously, ensures the stability and precision of rotor in high -speed rotation, thereby improves the overall performance and service life of compressor. BRIEF DESCRIPTION OF DRAWINGS

[0019] Fig. 1 It is whole structure perspective schematic drawing of the utility model;

[0020] Fig. 2 It is part sectional structure schematic drawing of the utility model. DETAILED DESCRIPTION

[0021] As Figs. 1-2 The utility model discloses a kind of open structure's screw compressor, including compressor shell 1, male screw rotor 2, first cylindrical bearing 21, second cylindrical bearing 22, first ball bearing 23, male rotor positioning sleeve 24, female screw rotor 3, third cylindrical bearing 31, fourth cylindrical bearing 32, second ball bearing 33, female rotor positioning sleeve 34, shaft coupling 4 and mechanical seal part 5.

[0022] The technical scheme in the embodiments of the utility model will be described clearly and completely in connection with the drawings in the embodiments of the utility model, and obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art without making creative labor belong to the range of protection of the utility model.

[0023] In the description of the embodiments of the utility model, it needs to be explained that, unless there is explicit provision and limitation, term, "connect", "install" should be broad-sense understanding, for example, "connect" can be detachably connected, can also be inseparably connected;It can be direct connection, also can be indirectly connected through intermediate medium. In addition, "communication" can be direct communication, also can be indirectly communicated through intermediate medium. Wherein, "fix" refers to each other connection and the relative position relationship of connection is invariable. The orientation language mentioned in the embodiments of the utility model, for example, "in", "out", "top", "bottom" etc. are only the direction of reference drawing, therefore, the orientation language used is for better, more clearly illustrate and understand the embodiments of the utility model, and is not indicated or implied that the device or element referred to must have a particular orientation, with a particular orientation structure and operation, therefore, it cannot be understood as the restriction of the embodiments of the utility model.

[0024] In the embodiments of the present application, the terms "first" and "second" are only used for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first" and "second" can explicitly or implicitly include one or more of the features.

[0025] The compressor shell 1 is a casting part, one side of the compressor shell 1 is provided with a hole for the shaft end of the male screw rotor 2 to pass through, the male screw rotor 2 and the female screw rotor 3 are rotatably installed in the compressor shell 1, and are arranged above and below and meshed with each other, one shaft end of the male screw rotor 2 extends to the outside of the compressor shell 1 through the hole on the compressor shell 1, and a shaft end of the male screw rotor 2 extending to the outside of the compressor shell 1 is provided with a shaft coupling 4.

[0026] The screw compressor with the open structure provided by the present application has the advantages that one end of the male screw rotor 2 is led out to the outside of the compressor shell 1 and assembled with the shaft coupling 4, the shaft coupling 4 can be connected with output shafts of various types of motors, has high universal adaptability, and the reliability and stability of the connection can be improved through the shaft coupling 4, thereby improving the performance of the whole compressor.

[0027] Specifically, a mechanical sealing part 5 is arranged between the male screw rotor 2 and the hole for the male screw rotor 2 to pass through to the outside of the compressor shell 1 for mechanical sealing, the mechanical sealing part 5 is used to mechanically seal the male screw rotor 2 and the hole for the male screw rotor 2 to pass through, which can provide reliable sealing effect, effectively prevent leakage of compressed gas, and improve the working efficiency and stability of the compressor, the mechanical sealing part 5 adopts existing conventional technology and will not be described in detail.

[0028] Specifically, the first cylindrical bearing 21, the second cylindrical bearing 22 and the first ball bearing 23 are sequentially arranged in the compressor shell 1, one shaft end of the male screw rotor 2 is matched and inserted into the first cylindrical bearing 21, and the other shaft end is sequentially matched and inserted into the second cylindrical bearing 22 and the first ball bearing 23, the first cylindrical bearing 21, the second cylindrical bearing 22 and the first ball bearing 23 are arranged to provide the male screw rotor 2 with rotation ability, and ensure that the male screw rotor 2 is smooth and stable during rotation.

[0029] Specifically, the third cylindrical bearing 31, the fourth cylindrical bearing 32 and the second ball bearing 33 are sequentially arranged above the male screw rotor 2 in the compressor shell 1, one shaft end of the female screw rotor 3 is matched and inserted into the third cylindrical bearing 31, and the other shaft end is sequentially matched and inserted into the fourth cylindrical bearing 32 and the second ball bearing 33, the third cylindrical bearing 31, the fourth cylindrical bearing 32 and the second ball bearing 33 are arranged to provide the female screw rotor 3 with rotation ability, and ensure that the female screw rotor 3 is smooth and stable during rotation.

[0030] In addition, the ball bearing and the cylindrical bearing are arranged on one side at the same time to rotatably install one end of the two rotors, the ball bearing is used for processing radial load and ensuring stable rotation of the rotor, and the cylindrical bearing is used for processing axial load such as thrust in the compression process, comprehensive support and protection are provided, so that the load bearing capacity of the two rotors in the radial and axial directions can be optimized respectively, and the stability and efficiency of the overall operation of the compressor are effectively improved.

[0031] Specifically, the male rotor positioning sleeve 24 is installed on the side of the compressor shell 1 away from the shaft coupling 4, and the male screw rotor 2 is matched and inserted into the male rotor positioning sleeve 24 at the end away from the shaft coupling 4.

[0032] The female rotor positioning sleeve 34 is installed above the male rotor positioning sleeve 24 in the compressor shell 1, and the female screw rotor 3 is matched and inserted into the female rotor positioning sleeve 34 at the end away from the shaft coupling 4.

[0033] By arranging the positioning sleeves at the shaft end of the two rotors respectively, the position of the rotors in the axial and radial directions is ensured to be accurate, axial movement is prevented, support is provided to disperse stress and vibration generated during operation, the stability and precision of the rotors in high-speed rotation are ensured, and the overall performance and service life of the compressor are improved.

[0034] In addition, most of the parts in the open structure screw compressor provided by the application are universal with the parts in the semi-closed compressor, the existing production line and inventory can be effectively utilized, the production process is more efficient, the investment in new equipment and the time cost of production adjustment are reduced, the development cost is reduced, and the universalization of product parts is improved.

[0035] It is obvious for those skilled in the art that the present application is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or essential characteristics of the present application. Therefore, the embodiments should be regarded as exemplary and non-limiting, the scope of the present application is defined by the appended claims rather than the above description, and all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present application.

Claims

1. A screw compressor of open construction, characterized in that: The screw compressor comprises a compressor shell (1), a male screw rotor (2) and a female screw rotor (3). The compressor shell (1) is a casting, one side of the compressor shell (1) is provided with a hole for the shaft end of the male screw rotor (2) to pass through. The male screw rotor (2) and the female screw rotor (3) are respectively rotatably installed in the compressor shell (1) and arranged in an upper-lower manner and engaged with each other. One shaft end of the male screw rotor (2) extends to the outside of the compressor shell (1) through the hole in the compressor shell (1). A shaft coupling (4) is installed on the shaft end of the male screw rotor (2) extending to the outside of the compressor shell (1).

2. A screw compressor of the open type according to claim 1, characterized in that: A mechanical seal part (5) is arranged between the male screw rotor (2) and the hole for the male screw rotor (2) to pass through to the outside of the compressor shell (1) to perform mechanical sealing.

3. A screw compressor of the open type according to claim 1, characterized in that: A first cylindrical bearing (21), a second cylindrical bearing (22) and a first spherical bearing (23) are sequentially arranged in the compressor shell (1). One shaft end of the male screw rotor (2) is matched and inserted into the first cylindrical bearing (21), and the other shaft end is sequentially matched and inserted into the second cylindrical bearing (22) and the first spherical bearing (23).

4. A screw compressor of the open type according to claim 1, characterized in that: A male rotor positioning sleeve (24) is installed on the side of the compressor shell (1) away from the shaft coupling (4). One end of the male screw rotor (2) away from the shaft coupling (4) is matched and inserted into the male rotor positioning sleeve (24).

5. A screw compressor of the open type according to claim 1, characterized in that: A third cylindrical bearing (31), a fourth cylindrical bearing (32) and a second spherical bearing (33) are sequentially arranged above the male screw rotor (2) in the compressor shell (1). One shaft end of the female screw rotor (3) is matched and inserted into the third cylindrical bearing (31), and the other shaft end is sequentially matched and inserted into the fourth cylindrical bearing (32) and the second spherical bearing (33).

6. A screw compressor of the open type according to claim 4, characterized in that: A female rotor positioning sleeve (34) is installed above the male rotor positioning sleeve (24) in the compressor shell (1). One end of the female screw rotor (3) away from the shaft coupling (4) is matched and inserted into the female rotor positioning sleeve (34).

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