CN215860800U

CN215860800U - Refrigerating machine oil adding device of screw compressor

Info

Publication number: CN215860800U
Application number: CN202122484188.XU
Authority: CN
Inventors: 何建人
Original assignee: WUXI WOYO SUPERDO COMPRESSOR CO Ltd
Current assignee: WUXI WOYO SUPERDO COMPRESSOR CO Ltd
Priority date: 2021-10-14
Filing date: 2021-10-14
Publication date: 2022-02-18
Anticipated expiration: 2031-10-14

Abstract

The utility model provides a refrigerating machine oil adding device of a screw compressor, which mainly comprises a machine body of the screw compressor and is characterized in that the machine body is provided with an inner cavity; the inner cavity comprises a female rotor cavity and a male rotor cavity; arc-shaped oil distribution pipes are respectively arranged outside the cavity of the female rotor and the cavity of the male rotor; the two oil distribution pipes are arranged in a mirror symmetry manner; two ends of the oil distribution pipe are closed, and an oil distribution groove is formed in the center of the oil distribution pipe; a plurality of spray heads are embedded in the oil distribution pipes outside the cavity of the female rotor and the cavity of the male rotor; the spray heads are uniformly distributed along the pipe diameter direction of the oil distribution pipe; the spray head is communicated with the oil distribution groove and the inner cavity; an oil injection head is arranged in the machine body; the inlet of the oil injection head is arranged outside the machine body; the outlet of the oil injection head is respectively communicated with the two oil distribution grooves through a three-way pipe. The utility model can realize multi-directional simultaneous oiling, realize the uniform distribution of the refrigerating machine oil in the inner cavity and accelerate the refrigerating efficiency.

Description

Refrigerating machine oil adding device of screw compressor

Technical Field

The utility model mainly relates to the technical field of screw compressors, in particular to a refrigerating machine oil adding device of a screw compressor.

Background

In the screw compressor, the refrigerant gas is sucked into the elementary volume formed by a pair of meshed male and female rotors, and is discharged after being sealed and compressed to form the high-temperature and high-pressure refrigerant gas. According to the physical properties of the gas, the temperature of the gas is up to 150-200 ℃ at the end of compression, and if a cooling medium is not sprayed into a compression cavity in the gas compression process, the high temperature cannot be borne by parts such as a common compressor shell, a bearing and the like. Therefore, the screw compressor must inject a proper amount of refrigerating machine oil into the compression chamber during the compression process to lower the temperature of the refrigerant vapor so that the compressor can normally operate.

In addition, the sprayed refrigerating machine oil can form oil films on the tooth meshing surfaces of the male rotor and the female rotor to separate the tooth surfaces of the male rotor and the female rotor from each other, so that the tooth surfaces of the male rotor and the female rotor are not directly contacted with each other in the meshing and transmission processes, and the abrasion of the tooth surfaces is reduced. Meanwhile, the sprayed refrigerating machine oil can also fill a gap between the rotor and the machine body hole, so that gas leakage is reduced, the energy of irregular vibration of gas is absorbed, and the effect of reducing airflow noise is achieved.

At present, the existing screw compressor is generally provided with a refrigerating machine oil injection hole only at one side of a cavity of a male rotor and a female rotor of a machine body. In this case, the refrigerant oil injected into the compression chamber is too concentrated and cannot be uniformly distributed in the entire cell volume, so that the refrigerant oil cannot be sufficiently mixed with the refrigerant gas, and thus heat exchange cannot be sufficiently performed. Especially for large compressors, the temperature of the compressor discharge is still high.

SUMMERY OF THE UTILITY MODEL

The utility model provides a refrigerating machine oil adding device of a screw compressor, aiming at the technical problem that refrigerating machine oil cannot be fully contacted and mixed with refrigerating working medium gas in the conventional screw compressor, so that heat exchange cannot be fully carried out.

The technical scheme provided by the utility model is as follows:

the utility model provides a refrigerating machine oil adding device of a screw compressor, which comprises a machine body of the screw compressor and is characterized in that the machine body is provided with an inner cavity; the inner cavity comprises a female rotor cavity and a male rotor cavity; arc-shaped oil distribution pipes are respectively arranged outside the cavity of the female rotor and the cavity of the male rotor; the two oil distribution pipes are arranged in a mirror symmetry manner; two ends of the oil distribution pipe are closed, and an oil distribution groove is formed in the center of the oil distribution pipe; a plurality of spray heads are embedded in the oil distribution pipes outside the cavity of the female rotor and the cavity of the male rotor; the spray heads are uniformly distributed along the pipe diameter direction of the oil distribution pipe; the spray head is communicated with the oil distribution groove and the inner cavity; an oil injection head is arranged in the machine body; the inlet of the oil injection head is arranged outside the machine body; the outlet of the oil injection head is respectively communicated with the two oil distribution grooves through a three-way pipe.

Preferably, the machine body is also provided with a sliding valve cavity; the sliding valve cavity is arranged at the bottom of the inner cavity and is communicated with the inner cavity; and a distance is reserved between the tail end of the oil distribution pipe and the wall surface of the sliding valve cavity.

Preferably, the oil injection head is arranged right above the inner cavity and opposite to the sliding valve cavity.

Preferably, the three-way pipe is embedded in the inner wall of the machine body and is made of fluororubber.

Preferably, a threaded joint is arranged at an inlet of the oil injection head; the oil injection head is fixed on the inner wall of the machine body through the threaded joint; the outlet end of the oil injection head is connected with the three-way pipe in a sleeved mode.

The utility model has the beneficial effects that:

the refrigerating machine oil adding device of the screw compressor provided by the utility model has the advantages that the refrigerating machine oil is uniformly injected into the two oil distribution grooves through the oil injection head and the three-way pipe, the spray head is communicated with the oil distribution grooves and the inner cavity, when the oil distribution grooves are filled with the refrigerating machine oil, the refrigerating machine oil is sprayed to the surfaces of the female rotor, the male rotor and the inner cavity through the spray head, and meanwhile, the spray head is provided with a plurality of spray heads which are uniformly distributed along the pipe diameter direction of the oil distribution pipe, namely, the spray heads are arranged along the wall surfaces of the cavity of the female rotor and the cavity of the male rotor in an arc manner, so that the multi-direction simultaneous oiling can be realized, the uniform distribution of the refrigerating machine oil in the inner cavity is realized, and the refrigerating efficiency is accelerated.

Drawings

The utility model and its features, aspects and advantages will become more apparent from reading the following detailed description of non-limiting embodiments with reference to the accompanying drawings. Like reference symbols in the various drawings indicate like elements. The drawings are not necessarily to scale, emphasis instead being placed upon illustrating the principles of the utility model.

Fig. 1 is an internal perspective view of a screw compressor according to the present invention;

FIG. 2 is a cross-sectional view of the present invention;

Detailed Description

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application.

It will be understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.

As used herein, the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," "outer," and the like are used in the positional or orientational relationship illustrated in the figures to facilitate the description of the utility model and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be construed as limiting the utility model.

The appearances of the terms first, second, and third, if any, are used for descriptive purposes only and are not intended to be limiting or imply relative importance.

Unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are intended to be inclusive and mean, for example, that they may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The technical solutions in the embodiments of the present invention are described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the utility model without making creative efforts, belong to the protection scope of the utility model.

Example 1

The utility model provides a refrigerating machine oil adding device of a screw compressor, aiming at the technical problem that refrigerating machine oil cannot be fully contacted and mixed with refrigerating working medium gas in the existing screw compressor, so that heat exchange cannot be fully carried out, and the refrigerating machine oil adding device comprises a machine body 1 of the screw compressor, and is characterized in that the machine body 1 is provided with an inner cavity 2; the inner cavity 2 comprises a female rotor cavity 201 and a male rotor cavity 202; arc-shaped oil distribution pipes 3 are respectively arranged outside the female rotor cavity 201 and the male rotor cavity 202; the two oil distribution pipes 3 are arranged in mirror symmetry; two ends of the oil distribution pipe 3 are closed, and an oil distribution groove 4 is arranged in the center; a plurality of nozzles 5 are embedded in the oil distribution pipes 3 outside the cavity 201 of the female rotor and the cavity 202 of the male rotor; the spray heads 5 are uniformly distributed along the pipe diameter direction of the oil distribution pipe 3; the spray head 5 is communicated with the oil distribution groove 4 and the inner cavity 2; an oil injection head 6 is arranged in the machine body 1; the inlet of the oil injection head 6 is arranged outside the machine body 1; the outlet of the oil injection head 6 is respectively communicated with the two oil distribution grooves 4 through a three-way pipe 7.

When the screw compressor's that this embodiment relates to refrigerator oil adds device during operation, refrigerator oil is through annotating oil head 6, evenly pour into two oil distribution grooves 4 via three-way pipe 7, because shower nozzle 5 intercommunication oil distribution groove 4 and inner chamber 2, fill full refrigerator oil in oil distribution groove 4, refrigerator oil sprays to cloudy through shower nozzle 5, positive rotor surface and inner chamber 2 surfaces, simultaneously because shower nozzle 5 is equipped with a plurality ofly and along the pipe diameter direction evenly distributed of oil distribution pipe 3, arrange along the wall arc of negative rotor cavity 201 and positive rotor cavity 202 promptly, consequently, can realize diversified oiling simultaneously, realize refrigerator oil evenly distributed in inner chamber 2, accelerate refrigeration efficiency.

The machine body 1 is also provided with a sliding valve cavity 8; the sliding valve cavity 8 is arranged at the bottom of the inner cavity 2 and is communicated with the inner cavity 2; in the screw compressor, a slide valve 9 which can translate back and forth is arranged in a slide valve cavity 8, in order to add refrigerating machine oil and not to hinder the normal work of the slide valve 9, a distance is reserved between the tail end of an oil distribution pipe 3 and the wall surface of the slide valve cavity 8, and the friction caused by the contact of the oil distribution pipe 3 and the slide valve 9 in the slide valve cavity 8 is avoided; the oil injection head 6 is arranged right above the inner cavity 2 and is opposite to the sliding valve cavity 8, so that the oil distribution pipe 3 is prevented from contacting the sliding valve 9, and the sliding valve 9 cannot work normally.

In the embodiment, the three-way pipe 7 is preferably embedded in the inner wall of the machine body 1, and the temperature of the gas after the compression of the screw compressor is finished is up to 150-200 ℃ according to the physical properties of the gas, so that the material of the three-way pipe 7 is required to resist high temperature, and the material of the three-way pipe 7 is fluororubber.

In order to facilitate replacement of the oil filling head 6, in the present embodiment, it is preferable that a threaded joint 10 is provided at an inlet of the oil filling head 6; the oil injection head 6 is fixed on the inner wall of the machine body 1 through a threaded joint 10; the connection mode of the outlet end of the oil injection head 6 and the three-way pipe 7 is in sleeve joint, when the oil injection head 6 is disassembled, the threaded joint 10 of the inlet end is screwed off, the oil injection head 6 originally sleeved in the three-way pipe 7 is pulled out, when a new oil injection head 6 is installed, the oil injection head 6 is sleeved in the three-way pipe 7, and the threaded joint 10 of the inlet end is screwed down.

The above-described embodiments are merely illustrative of the principles and utilities of the present patent application and are not intended to limit the present patent application. Modifications and variations can be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of this patent application. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical concepts disclosed in the present application shall be covered by the claims of the present application.

Claims

1. A refrigerating machine oil adding device of a screw compressor comprises a machine body of the screw compressor, and is characterized in that the machine body is provided with an inner cavity; the inner cavity comprises a female rotor cavity and a male rotor cavity; arc-shaped oil distribution pipes are respectively arranged outside the cavity of the female rotor and the cavity of the male rotor; the two oil distribution pipes are arranged in a mirror symmetry manner; two ends of the oil distribution pipe are closed, and an oil distribution groove is formed in the center of the oil distribution pipe;

a plurality of spray heads are embedded in the oil distribution pipes outside the cavity of the female rotor and the cavity of the male rotor; the spray heads are uniformly distributed along the pipe diameter direction of the oil distribution pipe; the spray head is communicated with the oil distribution groove and the inner cavity;

an oil injection head is arranged in the machine body; the inlet of the oil injection head is arranged outside the machine body; the outlet of the oil injection head is respectively communicated with the two oil distribution grooves through a three-way pipe.

2. The refrigerator oil adding device of a screw compressor according to claim 1, wherein: the machine body is also provided with a sliding valve cavity; the sliding valve cavity is arranged at the bottom of the inner cavity and is communicated with the inner cavity; and a distance is reserved between the tail end of the oil distribution pipe and the wall surface of the sliding valve cavity.

3. The refrigerator oil adding device of a screw compressor according to claim 2, wherein: the oil injection head is arranged right above the inner cavity and is opposite to the sliding valve cavity.

4. The refrigerator oil adding device of a screw compressor according to claim 3, wherein: the three-way pipe is embedded in the inner wall of the machine body and is made of fluororubber.

5. The refrigerator oil adding device of a screw compressor according to claim 4, wherein: a threaded joint is arranged at the inlet of the oil injection head; the oil injection head is fixed on the inner wall of the machine body through the threaded joint; the outlet end of the oil injection head is connected with the three-way pipe in a sleeved mode.