A centralized oil supply and return screw compressor

Abstract

The application discloses a screw compressor with centralized oil supply and return, which comprises a shell, a first oil tank arranged on the shell, a second oil tank arranged on the shell, and a pipeline assembly arranged between the first oil tank and the second oil tank and in the shell. The oil supply system originally requiring the pipeline to transport lubricating oil is simplified into the shell, the oil supply work for various oil points of the compressor is completed in the shell, and the high-temperature lubricating oil is returned to the oil tank through a total return pipeline. The technical scheme of the application removes the oil supply pipeline with a large floor area, becomes smaller in size, is not prone to failure, and is more stable in structure.

Description

TECHNICAL FIELD

[0001] Embodiments of the present application relate to the technical field of mechanical manufacturing, in particular to a screw compressor with centralized oil supply and return. BACKGROUND

[0002] A twin screw machine includes a twin screw compressor and a twin screw expander. In the prior art, the bearing and the synchronization gear of each rotor of the twin screw compressor need to be connected to a lubricating oil system through a pipe. This results in too many pipes connecting the lubricating oil system to the compressor, making the lubricating oil system too bulky. Further, it increases the floor area occupied by the compressor unit and also increases the cost and failure points of the lubricating oil system. At the same time, depending on the type of unit, the working condition, and other site project conditions, the lubricating oil system of the non-standard compressor needs to be designed frequently, which not only increases the workload of the engineering design personnel, resulting in a longer delivery time, but also reduces the efficiency of factory research and production due to the excessive customization, and also brings a considerable cost investment in installation and maintenance. SUMMARY

[0003] Embodiments of the present application provide a screw compressor with centralized oil supply and return to solve the technical problem of too many pipes and large floor area of the lubricating oil system of the compressor in the prior art.

[0004] To solve the above technical problems, embodiments of the present application disclose the following technical solutions:

[0005] The present application provides a screw compressor with centralized oil supply and return, comprising:

[0006] a housing;

[0007] a first oil tank arranged on the housing;

[0008] a second oil tank arranged on the housing;

[0009] the first oil tank and the second oil tank are connected through a pipeline assembly;

[0010] wherein the pipeline assembly is embedded in the housing.

[0011] Further, the pipeline assembly comprises an oil supply pipeline and an oil return pipeline, the oil supply pipeline is in communication with the first oil tank, and the oil return pipeline is in communication with the second oil tank;

[0012] wherein a throttle plug is arranged in the oil supply pipeline, and the throttle plug is provided with a throttling hole.

[0013] Further, the side wall of the first oil tank is provided with a first oil supply hole, a second oil supply hole, a third oil supply hole and a fourth oil supply hole, the oil supply pipeline comprises a horizontal oil supply pipeline and a vertical oil supply pipeline, the horizontal oil supply pipeline comprises a first horizontal oil supply pipe, a second horizontal oil supply pipe, a third horizontal oil supply pipe, a fourth horizontal oil supply pipe, a fifth horizontal oil supply pipe and a sixth horizontal oil supply pipe;

[0014] The first horizontal oil supply pipe is in communication with the first oil supply hole, the second horizontal oil supply pipe is in communication with the third oil supply hole, the third horizontal oil supply pipe is in communication with the second oil supply hole, the fourth horizontal oil supply pipe is in communication with the fourth oil supply hole, the fifth horizontal oil supply pipe is in communication with the first horizontal oil supply pipe, and the sixth horizontal oil supply pipe is in communication with the third horizontal oil supply pipe.

[0015] Further, the side wall of the second oil tank is provided with a first oil return hole, a second oil return hole, a third oil return hole and a fourth oil return hole, the oil return pipeline comprises a horizontal oil return pipeline and a vertical oil return pipeline, the horizontal oil return pipeline comprises a first horizontal oil return pipe, a second horizontal oil return pipe, a third horizontal oil return pipe, a fourth horizontal oil return pipe, a fifth horizontal oil return pipe and a sixth horizontal oil return pipe;

[0016] The first horizontal oil return pipe is in communication with the second oil supply hole, the second horizontal oil return pipe is in communication with the fourth oil supply hole, the third horizontal oil return pipe is in communication with the first oil return hole, the fourth horizontal oil return pipe is in communication with the third oil supply hole, the fifth horizontal oil return pipe is in communication with the first horizontal oil return pipe, and the sixth horizontal oil return pipe is in communication with the third horizontal oil return pipe.

[0017] Further, the shell comprises:

[0018] A rotor cavity;

[0019] A first end seat provided on one side of the rotor cavity;

[0020] A second end seat provided on a side of the rotor cavity away from the first end seat; a first end cover is provided on a side of the first end seat away from the rotor cavity, and a second end cover is provided on a side of the second end seat away from the rotor cavity;

[0021] The second horizontal oil supply pipe, the second horizontal oil return pipe, the fourth horizontal oil supply pipe and the fourth horizontal oil return pipe are provided on the first end seat;

[0022] The first horizontal oil supply pipe, the first vertical oil return pipe, the first horizontal oil return pipe, the third horizontal oil supply pipe, the third horizontal oil return pipe, the fifth horizontal oil supply pipe, the fifth horizontal oil return pipe, the sixth horizontal oil supply pipe and the sixth horizontal oil return pipe are provided on the second end seat.

[0023] Further, the first end seat is provided with a first hole, the second end seat is provided with a second hole, the rotor cavity is provided with a male rotor and a female rotor which are engaged with each other, one end of the male rotor is rotatably connected with the inner wall of the first hole, and the other end of the male rotor is rotatably connected with the inner wall of the second hole.

[0024] One end of the female rotor is rotatably connected with the inner wall of the first hole, and the other end of the female rotor is rotatably connected with the inner wall of the second hole.

[0025] Further, the first end seat is provided with a first seal, the second end seat is provided with a second seal, the first seal is connected with one side end of the male rotor, and the second seal is connected with the other side end of the male rotor.

[0026] Further, the first end seat is provided with a third seal, the second end seat is provided with a fourth seal, the third seal is connected with one side end of the male rotor, and the fourth seal is connected with the other side end of the male rotor.

[0027] Further, the first end seat is provided with a first bearing, the second end seat is provided with a second bearing, the first bearing is connected with one side end of the male rotor, and the second bearing is connected with the other side end of the male rotor.

[0028] Further, the first end seat is provided with a third bearing, the second end seat is provided with a fourth bearing, the third bearing is connected with one side end of the female rotor, and the fourth bearing is connected with the other side end of the female rotor.

[0029] Further, the second end seat is provided with a first gear and a second gear, the first gear is connected with the end of the male rotor, the second gear is connected with the end of the female rotor, and the first gear and the second gear are engaged with each other.

[0030] Further, the vertical oil supply pipeline comprises a first vertical oil supply pipeline, a second vertical oil supply pipeline, a third vertical oil supply pipeline, a fourth vertical oil supply pipeline, a fifth vertical oil supply pipeline and a sixth vertical oil supply pipeline.

[0031] The second vertical oil supply pipeline and the fourth vertical oil supply pipeline are arranged in the first end seat.

[0032] The first vertical oil supply pipeline, the third vertical oil supply pipeline, the fifth vertical oil supply pipeline and the sixth vertical oil supply pipeline are arranged in the second end seat.

[0033] One end of the first vertical oil supply pipe is in communication with the first horizontal oil supply pipe, and the other end of the first vertical oil supply pipe is in communication with the accommodating cavity of the first bearing. One end of the second vertical oil supply pipe is in communication with the third horizontal oil supply pipe, and the other end of the second vertical oil supply pipe is in communication with the accommodating cavity of the second bearing. One end of the third vertical oil supply pipe is in communication with the second horizontal oil supply pipe, and the other end of the third vertical oil supply pipe is in communication with the accommodating cavity of the third bearing. One end of the fourth vertical oil supply pipe is in communication with the fourth horizontal oil supply pipe, and the other end of the fourth vertical oil supply pipe is in communication with the accommodating cavity of the fourth bearing. One end of the fifth vertical oil supply pipe is in communication with the fifth horizontal oil supply pipe, and the other end of the fifth vertical oil supply pipe is in communication with the accommodating cavity of the first gear. One end of the sixth vertical oil supply pipe is in communication with the sixth horizontal oil supply pipe, and the other end of the sixth vertical oil supply pipe is in communication with the accommodating cavity of the second gear.

[0034] Further, the vertical oil return pipes include a first vertical oil return pipe, a second vertical oil return pipe, a third vertical oil return pipe, a fourth vertical oil return pipe, a fifth vertical oil return pipe and a sixth vertical oil return pipe.

[0035] The second vertical oil return pipe and the fourth vertical oil return pipe are arranged at the first end seat.

[0036] The first vertical oil return pipe, the third vertical oil return pipe, the fifth vertical oil return pipe and the sixth vertical oil return pipe are arranged at the second end seat.

[0037] One end of the first vertical oil return pipe is in communication with the third horizontal oil return pipe, and the other end of the first vertical oil return pipe is in communication with the accommodating cavity of the first bearing. One end of the second vertical oil return pipe is in communication with the fourth horizontal oil return pipe, and the other end of the second vertical oil return pipe is in communication with the accommodating cavity of the second bearing. One end of the third vertical oil return pipe is in communication with the first horizontal oil return pipe, and the other end of the third vertical oil return pipe is in communication with the accommodating cavity of the third bearing. One end of the fourth vertical oil return pipe is in communication with the second horizontal oil return pipe, and the other end of the fourth vertical oil return pipe is in communication with the accommodating cavity of the fourth bearing. One end of the fifth vertical oil return pipe is in communication with the sixth horizontal oil return pipe, and the other end of the fifth vertical oil return pipe is in communication with the accommodating cavity of the first gear. One end of the sixth vertical oil return pipe is in communication with the fifth horizontal oil return pipe, and the other end of the sixth vertical oil return pipe is in communication with the accommodating cavity of the second gear.

[0038] Further, the first oil tank is provided with a first cover plate, and the first cover plate is provided with a first oil hole. The second oil tank is provided with a second cover plate, and the second cover plate is provided with a second oil hole.

[0039] One of the above technical solutions has the following advantages or beneficial effects:

[0040] Compared with the prior art, the screw compressor of the present application has the following advantages or beneficial effects: The present application simplifies the oil circuit system originally requiring the delivery of lubricating oil through a pipeline to the inside of the shell, completes the oil supply work for each oil point of the compressor in the shell, and returns the high-temperature lubricating oil to the oil tank through a total return pipeline. The technical solution of the present application removes the oil supply pipeline which occupies a large area, becomes smaller in size, is less likely to fail, and is more stable in structure.

[0041] In the present application, the pipeline assembly includes an oil supply pipeline and an oil return pipeline, the oil supply pipeline is in communication with the first oil tank, and the oil return pipeline is in communication with the second oil tank; wherein the oil supply pipeline is provided with a throttle plug, and the throttle plug is provided with a flow limiting hole. The flow of lubricating oil is controlled by the throttle plug with different diameters in the shell, thereby adapting to the compressor unit with different amounts of lubricating oil, batch production of equipment can be realized, different throttle plugs are replaced for different customized compressor units, flow control of lubricating oil is realized, and thus it is possible to use a non-customized oil supply system in a customized unit. BRIEF DESCRIPTION OF DRAWINGS

[0042] The technical solutions and other beneficial effects of the present application will become apparent through the following detailed description of the specific embodiments of the present application in conjunction with the accompanying drawings.

[0043] Figure 1 The front view structural schematic diagram provided for the embodiment of the present application is shown in the figure;

[0044] Figure 2 The front view structural schematic diagram provided for the embodiment of the present application is shown in the figure; Figure 1 The cross-sectional structural schematic diagram along the AA direction is shown in the figure;

[0045] Figure 3 The front view structural schematic diagram provided for the embodiment of the present application is shown in the figure;

[0046] Figure 4 The front view structural schematic diagram provided for the embodiment of the present application is shown in the figure;

[0047] Figure 5 The front view structural schematic diagram provided for the embodiment of the present application is shown in the figure;

[0048] Figure 6 The front view structural schematic diagram provided for the embodiment of the present application is shown in the figure;

[0049] Figure 7 The front view structural schematic diagram provided for the embodiment of the present application is shown in the figure;

[0050] Figure 8 A perspective top view structural schematic diagram of the second end seat provided for the embodiment of the present application;

[0051] Figure 9 A perspective top view structural schematic diagram of the first end seat provided for the embodiment of the present application;

[0052] Figure 10 A perspective bottom view structural schematic diagram of the first end seat provided for the embodiment of the present application;

[0053] Figure 11 A structural schematic diagram of the throttle plug provided for the embodiment of the present application.

[0054] The reference signs are as follows:

[0055] 100-compressor, 110-rotor cavity, 120-first oil tank, 121-first cover plate, 122-first oil hole, 123-first oil supply hole, 124-second oil supply hole, 125-third oil supply hole, 126-fourth oil supply hole, 130-second oil tank, 131-second cover plate, 132-second oil hole, 133-first oil return hole, 134-second oil return hole, 135-third oil return hole, 136-fourth oil return hole, 140-first end seat, 141-first end cover, 142-first distribution hole, 150-second end seat, 151-second end cover, 152-second distribution hole, 160-male rotor, 161-first sealing member, 162-second sealing member, 163-first bearing, 1631-first vertical oil supply pipe, 1632-first horizontal oil supply pipe, 1633-first vertical oil return pipe, 1634-first horizontal oil return pipe, 164-second bearing, 1641-second vertical oil supply pipe, 1642-second horizontal oil supply pipe, 1643-second vertical oil return pipe, 1644-second horizontal oil return pipe, 165-first gear, 1651-fifth vertical oil supply pipe, 1652-fifth horizontal oil supply pipe, 1653-fifth vertical oil return pipe, 1654-fifth horizontal oil return pipe, 170-female rotor, 171-third sealing member, 172-fourth sealing member, 173-third bearing, 1731-third vertical oil supply pipe, 1732-third horizontal oil supply pipe, 1733-third vertical oil return pipe, 1734-third horizontal oil return pipe, 174-fourth bearing, 1741-fourth vertical oil supply pipe, 1742-fourth horizontal oil supply pipe, 1743-fourth vertical oil return pipe, 1744-fourth horizontal oil return pipe, 175-second gear, 1751-sixth vertical oil supply pipe, 1752-sixth horizontal oil supply pipe, 1753-sixth vertical oil return pipe, 1754-sixth horizontal oil return pipe, 180-throttle plug, 190-housing. DETAILED DESCRIPTION

[0056] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. In the description of this application, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this application and simplifying the description. They 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, and therefore should not be construed as a limitation of this application. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of the stated features. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0057] The specific implementation methods of this application are illustrated below through examples:

[0058] Please see Figure 1 This application provides a centralized oil supply and return screw compressor, including a housing 190, a first oil tank 120, a second oil tank 130, and a piping assembly. The first oil tank 120 is disposed on the housing 190; the second oil tank 130 is disposed on the housing 190; the first oil tank 120 and the second oil tank 130 are connected by the piping assembly, which is embedded within the housing 190. It is understood that the first oil tank 120 and the second oil tank 130 are connected by the piping assembly embedded in the housing 190. During compressor operation, the lubricating oil in the first oil tank 120 and the second oil tank 130 is transported back and forth through the piping assembly. Because the connection of external pipes is reduced, the compressor's shape is more concise. It should be noted that in order to arrange the pipes within the housing 190, the housing 190 needs to be increased in thickness and strength to ensure stable lubricating oil delivery and prevent contamination caused by pipe rupture.

[0059] Please see Figure 3 , Figure 4 and Figure 11 In this embodiment of the application, the pipeline assembly includes an oil supply pipeline and an oil return pipeline. The oil supply pipeline is connected to the first oil tank 120, and the oil return pipeline is connected to the second oil tank 130.

[0060] The oil supply pipeline includes a throttle plug 180 with a flow-limiting orifice 181. It is understood that different compressor models have different power outputs and therefore different lubricating oil requirements. Therefore, the flow rate of the lubricating oil can be controlled by changing the inner diameter of the flow-limiting orifice 181 on the throttle plug 180 inside the oil supply pipeline. Increasing the orifice diameter increases the flow rate of lubricating oil through the throttle plug 180, thus increasing the compressor's lubricating oil demand; conversely, decreasing the orifice diameter reduces the flow rate. By controlling the orifice diameter of the flow-limiting orifice 181, mass production of the compressor body can be achieved, while adding the throttle plug 180 to the oil supply pipeline to limit the lubricating oil flow allows for the creation of different models. It is conceivable that the throttle plug 180 can be installed not only in the oil supply pipeline but also in the oil return pipeline, depending on the ease of installation and maintenance. Meanwhile, in order to facilitate control and meet production requirements, the throttle plug 180 can be set as an electronic valve, which changes the orifice diameter of the flow limiting orifice 181 through an electrical signal, thereby satisfying the arbitrary control of the size of the flow limiting orifice 181 and thus realizing dynamic control of the flow rate of lubricating oil.

[0061] Please see Figure 3 , Figure 5 and Figure 7 In this embodiment of the application, the side wall of the first oil tank 120 is provided with a first oil supply hole 123, a second oil supply hole 124, a third oil supply hole 125 and a fourth oil supply hole 126. The oil supply pipeline includes a horizontal oil supply pipeline and a vertical oil supply pipeline. The horizontal oil supply pipeline includes a first horizontal oil supply pipe 1632, a second horizontal oil supply pipe 1642, a third horizontal oil supply pipe 1732, a fourth horizontal oil supply pipe 1742, a fifth horizontal oil supply pipe 1652 and a sixth horizontal oil supply pipe 1752.

[0062] Specifically, the first horizontal oil supply pipe 1632 is connected to the first oil supply hole 123, the second horizontal oil supply pipe 1642 is connected to the third oil supply hole 125, the third horizontal oil supply pipe 1732 is connected to the second oil supply hole 124, the fourth horizontal oil supply pipe 1742 is connected to the fourth oil supply hole 126, the fifth horizontal oil supply pipe 1652 is connected to the first horizontal oil supply pipe 1632, and the sixth horizontal oil supply pipe 1752 is connected to the third horizontal oil supply pipe 1732. It can be understood that the first oil tank 120 is an oil supply tank, which delivers lubricating oil to the workpiece requiring lubrication through connection with an external oil pump. The first oil tank 120 includes four oil supply holes: the first oil supply hole 123 and the second oil supply hole 124 are located on the same side, and the third oil supply hole 125 and the fourth oil supply hole 126 are located on the other side. After the oil pump is started, the lubricating oil inside the first oil tank 120 is delivered to the first horizontal oil supply pipe 1632 and the fifth horizontal oil supply pipe 1652 through the first oil supply hole 123, the second oil supply hole 124 delivers the lubricating oil to the third horizontal oil supply pipe 1732 and the sixth horizontal oil supply pipe 1752, the third oil supply hole 125 delivers the lubricating oil to the second horizontal oil supply pipe 1642, and the fourth oil supply hole 126 delivers the lubricating oil to the fourth horizontal oil supply pipe 1742; the horizontal delivery of the first oil tank 120 is completed through the four oil supply holes.

[0063] Please see Figure 2 , Figure 3 , Figure 5 and Figure 7 In this embodiment of the application, the vertical oil supply pipeline includes a first vertical oil supply pipe 1631, a second vertical oil supply pipe 1642, a third vertical oil supply pipe 1731, a fourth vertical oil supply pipe 1742, a fifth vertical oil supply pipe 1651, and a sixth vertical oil supply pipe 1751.

[0064] Specifically, one end of the first vertical oil supply pipe 1631 is connected to the first horizontal oil supply pipe 1632, and the other end of the first vertical oil supply pipe 1631 is connected to the receiving cavity of the first bearing 163. One end of the second vertical oil supply pipe 1642 is connected to the third horizontal oil supply pipe 1732, and the other end of the second vertical oil supply pipe 1642 is connected to the receiving cavity of the second bearing 164. One end of the third vertical oil supply pipe 1731 is connected to the second horizontal oil supply pipe 1642, and the other end of the third vertical oil supply pipe 1731 is connected to the receiving cavity of the third bearing 173. The fourth vertical oil supply pipe 1742 is connected at one end to the fourth horizontal oil supply pipe 1742, and at the other end to the receiving cavity of the fourth bearing 174. The fifth vertical oil supply pipe 1651 is connected at one end to the fifth horizontal oil supply pipe 1652, and at the other end to the receiving cavity of the first gear 165. The sixth vertical oil supply pipe 1751 is connected at one end to the sixth horizontal oil supply pipe 1752, and at the other end to the receiving cavity of the second gear 175. Understandably, driven by the oil pump, lubricating oil enters the first horizontal oil supply pipe 1632, the second horizontal oil supply pipe 1642, the third horizontal oil supply pipe 1732, the fourth horizontal oil supply pipe 1742, the fifth horizontal oil supply pipe 1652, and the sixth horizontal oil supply pipe 1752 respectively. Subsequently, the lubricating oil in the first horizontal oil supply pipe 1632 enters the first vertical oil supply pipe 1631 and flows along it into the receiving cavity of the first bearing 163. The lubricating oil in the third horizontal oil supply pipe 1732 enters the second vertical oil supply pipe 1642 and flows along it into the receiving cavity of the second bearing 164. The lubricating oil in the second horizontal oil supply pipe 1642... Lubricating oil enters the third vertical oil supply pipe 1731 and flows along it into the receiving cavity of the third bearing 173; lubricating oil in the fourth horizontal oil supply pipe 1742 enters the fourth vertical oil supply pipe 1742 and flows along it into the receiving cavity of the fourth bearing 174; lubricating oil in the fifth horizontal oil supply pipe 1652 enters the fifth vertical oil supply pipe 1651 and flows along it into the receiving cavity of the first gear 165; lubricating oil in the sixth horizontal oil supply pipe 1752 enters the sixth vertical oil supply pipe 1751 and flows along it into the receiving cavity of the second gear 175. It is conceivable that the lubricating oil in the first oil tank 120 is transported to the first bearing 163, the second bearing 164, the third bearing 173, the fourth bearing 174, the first gear 165, and the second gear 175 for lubrication through the cooperation of horizontal and vertical oil supply pipelines. The combination of the two types of pipelines reduces the amount of pipeline exposed on the outside, increases the transport capacity between pipelines, improves the stability of the pipeline, and avoids contamination caused by pipeline rupture.

[0065] Please see Figure 2 , Figure 4 , Figure 8 and Figure 10 In this embodiment of the application, the vertical return oil pipeline includes a first vertical return oil pipe 1633, a second vertical return oil pipe 1643, a third vertical return oil pipe 1733, a fourth vertical return oil pipe 1743, a fifth vertical return oil pipe 1653, and a sixth vertical return oil pipe 1753.

[0066] Specifically, one end of the first vertical oil return pipe 1633 is connected to the third horizontal oil return pipe 1734, and the other end of the first vertical oil return pipe 1633 is connected to the receiving cavity of the first bearing 163; one end of the second vertical oil return pipe 1643 is connected to the fourth horizontal oil return pipe 1744, and the other end of the second vertical oil return pipe 1643 is connected to the receiving cavity of the second bearing 164; one end of the third vertical oil return pipe 1733 is connected to the first horizontal oil return pipe 1634, and the other end of the third vertical oil return pipe 1733 is connected to the receiving cavity of the third bearing 173. The fourth vertical oil return pipe 1743 is connected at one end to the second horizontal oil return pipe 1644, and at the other end to the receiving cavity of the fourth bearing 174. The fifth vertical oil return pipe 1653 is connected at one end to the sixth horizontal oil return pipe 1754, and at the other end to the receiving cavity of the first gear 165. The sixth vertical oil return pipe 1753 is connected at one end to the fifth horizontal oil return pipe 1654, and at the other end to the receiving cavity of the second gear 175. Understandably, the lubricating oil system is a circulating system. After the lubricating oil lubricates the various workpiece parts, the lubricating oil in the cavity containing the first bearing 163 flows into the first vertical return oil pipe 1633, and then enters the third horizontal return oil pipe 1734 along the first vertical return oil pipe 1633; the lubricating oil in the cavity containing the second bearing 164 flows into the second vertical return oil pipe 1643, and then enters the fourth horizontal return oil pipe 1744 along the second vertical return oil pipe 1643; the lubricating oil in the cavity containing the third bearing 173 flows into the third vertical return oil pipe 1733, and then enters the fourth horizontal return oil pipe 1744 along the third vertical return oil pipe 1734. 733 enters the first horizontal return oil pipe 1634; the lubricating oil in the cavity where the fourth bearing 174 is located flows into the fourth vertical return oil pipe 1743, and then the lubricating oil enters the second horizontal return oil pipe 1644 along the fourth vertical return oil pipe 1743; the lubricating oil in the cavity where the first gear 165 is located flows into the fifth vertical return oil pipe 1653, and then the lubricating oil enters the sixth horizontal return oil pipe 1754 along the fifth vertical return oil pipe 1653; the lubricating oil in the cavity where the second gear 175 is located flows into the sixth vertical return oil pipe 1753, and then the lubricating oil enters the fifth horizontal return oil pipe 1654 along the sixth vertical return oil pipe 1753.

[0067] Please refer to the figure.Figure 4 , Figure 6 , Figure 8 and Figure 10 In this embodiment of the application, the side wall of the second oil tank 130 is provided with a first oil return hole 133, a second oil return hole 134, a third oil return hole 135 and a fourth oil return hole 136. The oil return pipeline includes a horizontal oil return pipeline and a vertical oil return pipeline. The horizontal oil return pipeline includes a first horizontal oil return pipe 1634, a second horizontal oil return pipe 1644, a third horizontal oil return pipe 1734, a fourth horizontal oil return pipe 1744, a fifth horizontal oil return pipe 1654 and a sixth horizontal oil return pipe 1754.

[0068] Specifically, the first horizontal return oil pipe 1634 is connected to the second oil supply hole 134, the second horizontal return oil pipe 1644 is connected to the fourth oil supply hole 136, the third horizontal return oil pipe 1734 is connected to the first return oil hole 133, the fourth horizontal return oil pipe 1744 is connected to the third oil supply hole 135, the fifth horizontal return oil pipe 1654 is connected to the first horizontal return oil pipe 1634, and the sixth horizontal return oil pipe 1754 is connected to the third horizontal return oil pipe 1734. Understandably, as the oil pump drives the lubricating oil, the lubricating oil entering the third horizontal return oil pipe 1734 enters the second oil tank 130 along the first return oil hole 133; the lubricating oil entering the fourth horizontal return oil pipe 1744 enters the second oil tank 130 along the third supply oil hole 135; the lubricating oil entering the first horizontal return oil pipe 1634 enters the second oil tank 130 along the second supply oil hole 134; the lubricating oil entering the second horizontal return oil pipe 1644 enters the second oil tank 130 along the fourth supply oil hole 136; the lubricating oil entering the sixth horizontal return oil pipe 1754 first enters the third horizontal return oil pipe 1734 and then enters the second oil tank 130 along the first return oil hole 133; the lubricating oil entering the fifth horizontal return oil pipe 1654 first enters the first horizontal return oil pipe 1634 and then enters the second oil tank 130 along the second supply oil hole 134.

[0069] As can be seen, the entire flow process described above allows the lubricating oil in the first oil tank 120 to pass sequentially through a horizontal oil supply pipe, a vertical oil supply pipe, the workpiece's receiving cavity, a vertical oil return pipe, and a horizontal oil return pipe before finally entering the second oil tank 130. This process achieves cooling and lubrication of the workpiece. The lubricating oil in the second oil tank 130 is then processed by an oil pump, an oil filter, and an oil cooler before being reintroduced into the first oil tank 120 for recycling. The steps of filtering and cooling the lubricating oil are standard techniques in this field and will not be elaborated upon further here.

[0070] Please see Figure 1 and Figure 2In this embodiment of the application, the housing 190 includes a rotor cavity 110, a first end seat 140, and a second end seat 150. The first end seat 140 is disposed on one side of the rotor cavity 110. The second end seat 150 is disposed on the side of the rotor cavity 110 away from the first end seat 140. A first end cap 141 is provided on the side of the first end seat 140 away from the rotor cavity 110, and a second end cap 151 is provided on the side of the second end seat 150 away from the rotor cavity 110. It can be understood that the first end seat 140 and the second end seat 150 are respectively disposed on both sides of the rotor cavity 110, while the first end cap 141 covers the other side of the first end seat 140, and the second end cap 151 covers the other side of the second end seat 150. In the embodiments of this application, the first end cover 141 and the first end seat 140 are separate, the second end cover 151 and the second end seat 150 are separate, the first end seat 140 and the rotor cavity 110 are separate, and the second end seat 150 and the rotor cavity 110 are separate. In some other embodiments, the first end cover 141 and the first end seat 140 can be integrated; the second end cover 151 and the second end seat 150 can be integrated; the first end seat 140 and the rotor cavity 110 can be integrated; and the corresponding second end seat 150 and the rotor cavity 110 can be integrated. Furthermore, depending on the model and function of the compressor, two or three adjacent parts of the first end cover 141, the first end seat 140, the rotor cavity 110, the second end seat 150, and the second end cover 151 can be designed as an integrated unit, while the other parts are designed as separate units.

[0071] Please see Figure 7 , Figure 8 , Figure 9 , Figure 10 In this embodiment, the first end seat 140 is provided with a first cloth hole 142, the second end seat 150 is provided with a second cloth hole 152, and the rotor cavity 110 is provided with a male rotor 160 and a female rotor 170. One end of the male rotor 160 is rotatably connected to the inner wall of the first cloth hole 142, and the other end of the male rotor 160 is rotatably connected to the inner wall of the second cloth hole 152; one end of the female rotor 170 is rotatably connected to the inner wall of the first cloth hole 142, and the other end of the female rotor 170 is rotatably connected to the inner wall of the second cloth hole 152. It can be understood that the twin-screw compressor includes a male rotor 160 and a female rotor 170 that mesh with each other, and compresses air through the meshing rotation of the male rotor 160 and the female rotor 170; both ends of the male rotor 160 and the female rotor 170 are provided with ends, and the ends of both are rotatably connected to the first cloth hole 142 provided on the first end seat 140 and the second cloth hole 152 provided on the second end seat 150, respectively. Driven by an external motor, the male rotor 160 and the female rotor 170 can rotate.

[0072] Please see Figure 2In this embodiment, a first sealing element 161 is provided in the first end seat 140, and a second sealing element 162 is provided in the second end seat 150. The first sealing element 161 is connected to one end of the male rotor 160, and the second sealing element 162 is connected to the other end of the male rotor 160. A third sealing element 171 is provided in the first end seat 140, and a fourth sealing element 172 is provided in the second end seat 150. The third sealing element 171 is connected to one end of the male rotor 160, and the fourth sealing element 172 is connected to the other end of the male rotor 160. Understandably, the first seal 161 and the second seal 162 are respectively disposed at both ends of the male rotor 160 to seal the two ends of the male rotor 160; similarly, the third seal 171 and the fourth seal 172 are disposed at both ends of the female rotor 170 to seal the two ends of the female rotor 170; by sealing the ends of the male rotor 160 and the female rotor 170 with four seals respectively, it is possible to effectively prevent the air to be compressed from leaking out from the ends of the male rotor 160 or the female rotor 170, thereby reducing the compression performance of the compressor.

[0073] Please see Figure 2 In this embodiment, a first bearing 163 is provided in the first end seat 140, and a second bearing 164 is provided in the second end seat 150. The first bearing 163 is connected to one end of the male rotor 160, and the second bearing 164 is connected to the other end of the male rotor. A third bearing 173 is provided in the first end seat 140, and a fourth bearing 174 is provided in the second end seat 150. The third bearing 173 is connected to one end of the female rotor 170, and the fourth bearing 174 is connected to the other end of the female rotor 170. Understandably, the first bearing 163 and the second bearing 164 are respectively disposed at the two ends of the male rotor 160 to reduce the friction between the two ends of the male rotor 160 and the first end seat 140 and the second end seat 150, thereby increasing the air compression efficiency. Similarly, the third bearing 173 and the fourth bearing 174 are respectively disposed at the two ends of the female rotor 170 to reduce the friction between the two ends of the female rotor 170 and the first end seat 140 and the second end seat 150, thereby increasing the rotation speed of the female rotor 170. By reducing the friction between the male rotor 160 and the female rotor 170 and the first end seat 140 and the second end seat 150 through the four bearings, the rotation between the male rotor 160 and the female rotor 170 is made smoother, thereby increasing the air compression efficiency.

[0074] Please see Figure 2In this embodiment, the second end seat 150 is provided with a first gear 165 and a second gear 175. The first gear 165 is connected to the end of the male rotor 160, and the second gear 175 is connected to the end of the female rotor 170. The first gear 165 and the second gear 175 mesh with each other. It can be understood that the male rotor 160 and the female rotor 170 need to mesh and rotate synchronously. Therefore, after the external motor drives the male rotor 160 or the female rotor 170 to rotate, the male rotor 160 or the female rotor 170 is then driven to rotate by the meshing first gear 165 and the second gear 175. This reduces the pressure on the main shaft of the male rotor 160 and the female rotor 170, and avoids slippage of the male rotor 160 and the female rotor 170 during rotation, which would result in the inability to compress air.

[0075] In this embodiment, the second vertical oil supply pipe 1641, the second horizontal oil supply pipe 1642, the second vertical oil return pipe 1643, the second horizontal oil return pipe 1644, the fourth vertical oil supply pipe 1741, the fourth horizontal oil supply pipe 1742, the fourth vertical oil return pipe 1743, and the fourth horizontal oil return pipe 1744 are disposed on the first end seat 140.

[0076] The first vertical oil supply pipe 1631, the first horizontal oil supply pipe 1632, the first vertical oil return pipe 1633, the first horizontal oil return pipe 1634, the third vertical oil supply pipe 1731, the third horizontal oil supply pipe 1732, the third vertical oil return pipe 1733, the third horizontal oil return pipe 1734, the fifth vertical oil supply pipe 1651, the fifth horizontal oil supply pipe 1652, the fifth vertical oil return pipe 1653, the fifth horizontal oil return pipe 1654, the sixth vertical oil supply pipe 1751, the sixth horizontal oil supply pipe 1752, the sixth vertical oil return pipe 1753, and the sixth horizontal oil return pipe 1754 are provided at the second end seat 150. Understandably, the oil supply and return pipelines are respectively installed on the first end seat 140 and the second end seat 150. The oil pump drives the lubricating oil from the first oil tank 120 along the oil supply pipeline into the receiving cavity of each workpiece for lubrication. Subsequently, the lubricating oil returns to the second oil tank 130 via the return pipeline. By embedding the oil supply and return pipelines on the first end seat 140 and the second end seat 150, the volume occupied by the pipelines is reduced, which also facilitates production and processing, and brings convenience to subsequent maintenance and upkeep.

[0077] Please see Figure 1 , Figure 3 and Figure 4In this embodiment, the first oil tank 120 is provided with a first cover plate 121, and the first cover plate 121 is provided with a first oil hole 122. The second oil tank 130 is provided with a second cover plate 131, and the second cover plate 131 is provided with a second oil hole 132. It can be understood that the first oil tank 120 is closed by the first cover plate 121, and the second oil tank 130 is closed by the second cover plate 131. The first oil hole 122 and the second oil hole 132 are connected to an oil pump, an oil filter, and an oil cooler. The oil pump provides power to the lubricating oil of the entire system, and the lubricating oil in the second oil tank 130 is processed by the oil filter and the oil cooler before entering the first oil tank 120 for a second circulation, thus realizing the dynamic circulation of the lubricating oil.

[0078] The above provides a detailed description of a centralized oil supply and return screw compressor provided in the embodiments of this application. Specific examples have been used to illustrate the principles and implementation methods of this application. The description of the above embodiments is only for the purpose of helping to understand the technical solutions and core ideas of this application. Those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A screw compressor with centralized oil supply and return, characterized in that, include: Casing (190); The first oil tank (120) is disposed on the housing (190); The second oil tank (130) is disposed on the housing (190); The first oil tank (120) and the second oil tank (130) are connected by a pipe assembly. When the compressor is running, the lubricating oil in the first oil tank (120) and the second oil tank (130) is transported back and forth through the pipe assembly. The pipeline assembly is embedded within the housing (190); the pipeline assembly includes an oil supply pipeline and an oil return pipeline, the oil supply pipeline being connected to the first oil tank (120), and the oil return pipeline being connected to the second oil tank (130); the oil return pipeline includes a horizontal oil return pipeline and a vertical oil return pipeline, the horizontal oil return pipeline including a first horizontal oil return pipe (1634), a second horizontal oil return pipe (1644), a third horizontal oil return pipe (1734), a fourth horizontal oil return pipe (1744), a fifth horizontal oil return pipe (1654), and a sixth horizontal oil return pipe (1754), the fifth horizontal oil return pipe (1654) being connected to the first horizontal oil return pipe (1634), and the sixth horizontal oil return pipe (1754) being connected to the third horizontal oil return pipe (1734); the vertical oil return pipeline includes a first vertical oil return pipe (1633). The system comprises a second vertical return oil pipe (1643), a third vertical return oil pipe (1733), a fourth vertical return oil pipe (1743), a fifth vertical return oil pipe (1653), and a sixth vertical return oil pipe (1753). One end of the first vertical return oil pipe (1633) is connected to the third horizontal return oil pipe (1734). One end of the second vertical return oil pipe (1643) is connected to the fourth horizontal return oil pipe (1744). One end of the third vertical return oil pipe (1733) is connected to the first horizontal return oil pipe (1634). One end of the fourth vertical return oil pipe (1743) is connected to the second horizontal return oil pipe (1644). One end of the fifth vertical return oil pipe (1653) is connected to the sixth horizontal return oil pipe (1754). The housing (190) includes: Rotor cavity (110); The first end seat (140) is disposed on one side of the rotor cavity (110); The second end seat (150) is located on the side of the rotor cavity (110) away from the first end seat (140); the oil supply pipe and the oil return pipe are located on the first end seat (140) and the second end seat (150).

2. The screw compressor with centralized oil supply and return as described in claim 1, characterized in that, The oil supply pipeline is provided with a throttle plug (180), and the throttle plug (180) is provided with a flow limiting orifice (181).

3. The screw compressor with centralized oil supply and return as described in claim 2, characterized in that, The side wall of the first oil tank (120) is provided with a first oil supply hole (123), a second oil supply hole (124), a third oil supply hole (125) and a fourth oil supply hole (126). The oil supply pipeline includes a horizontal oil supply pipeline and a vertical oil supply pipeline. The horizontal oil supply pipeline includes a first horizontal oil supply pipe (1632), a second horizontal oil supply pipe (1642), a third horizontal oil supply pipe (1732), a fourth horizontal oil supply pipe (1742), a fifth horizontal oil supply pipe (1652) and a sixth horizontal oil supply pipe (1752). The first horizontal oil supply pipe (1632) is connected to the first oil supply hole (123), the second horizontal oil supply pipe (1642) is connected to the third oil supply hole (125), the third horizontal oil supply pipe (1732) is connected to the second oil supply hole (124), the fourth horizontal oil supply pipe (1742) is connected to the fourth oil supply hole (126), the fifth horizontal oil supply pipe (1652) is connected to the first horizontal oil supply pipe (1632), and the sixth horizontal oil supply pipe (1752) is connected to the third horizontal oil supply pipe (1732).

4. The screw compressor with centralized oil supply and return as described in claim 3, characterized in that, The side wall of the second oil tank (130) is provided with a first oil return hole (133), a second oil return hole (134), a third oil return hole (135) and a fourth oil return hole (136). The first horizontal return oil pipe (1634) is connected to the second return oil hole (134), the second horizontal return oil pipe (1644) is connected to the fourth return oil hole (136), the third horizontal return oil pipe (1734) is connected to the first return oil hole (133), and the fourth horizontal return oil pipe (1744) is connected to the third return oil hole (135).

5. The screw compressor with centralized oil supply and return as described in claim 4, characterized in that, The first end seat (140) is provided with a first end cover (141) on the side away from the rotor cavity (110), and the second end seat (150) is provided with a second end cover (151) on the side away from the rotor cavity (110). The second horizontal oil supply pipe (1642), the second horizontal oil return pipe (1644), the fourth horizontal oil supply pipe (1742) and the fourth horizontal oil return pipe (1744) are located on the first end seat (140). The first horizontal oil supply pipe (1632), the first horizontal oil return pipe (1634), the third horizontal oil supply pipe (1732), the third horizontal oil return pipe (1734), the fifth horizontal oil supply pipe (1652), the fifth horizontal oil return pipe (1654), the sixth horizontal oil supply pipe (1752), and the sixth horizontal oil return pipe (1754) are disposed on the second end seat (150).

6. The screw compressor with centralized oil supply and return as described in claim 5, characterized in that, The first end seat (140) is provided with a first cloth hole (142), and the second end seat (150) is provided with a second cloth hole (152). The rotor cavity (110) is provided with a male rotor (160) and a female rotor (170) that mesh with each other. One end of the male rotor (160) is rotatably connected to the inner wall of the first cloth hole (142), and the other end of the male rotor (160) is rotatably connected to the inner wall of the second cloth hole (152). One end of the female rotor (170) is rotatably connected to the inner wall of the first cloth hole (142), and the other end of the female rotor (170) is rotatably connected to the inner wall of the second cloth hole (152).

7. The screw compressor with centralized oil supply and return as described in claim 6, characterized in that, The first end seat (140) is provided with a first seal (161), and the second end seat (150) is provided with a second seal (162). The first seal (161) is connected to one end of the male rotor (160), and the second seal (162) is connected to the other end of the male rotor (160).

8. The screw compressor with centralized oil supply and return as described in claim 7, characterized in that, The first end seat (140) is provided with a third seal (171), and the second end seat (150) is provided with a fourth seal (172). The third seal (171) is connected to one end of the male rotor (160), and the fourth seal (172) is connected to the other end of the male rotor (160).

9. The screw compressor with centralized oil supply and return as described in claim 8, characterized in that, The first end seat (140) is provided with a first bearing (163), and the second end seat (150) is provided with a second bearing (164). The first bearing (163) is connected to one side of the male rotor (160), and the second bearing (164) is connected to the other side of the male rotor (160).

10. The screw compressor with centralized oil supply and return as described in claim 9, characterized in that, The first end seat (140) is provided with a third bearing (173), and the second end seat (150) is provided with a fourth bearing (174). The third bearing (173) is connected to one end of the female rotor (170), and the fourth bearing (174) is connected to the other end of the female rotor (170).

11. The screw compressor with centralized oil supply and return as described in claim 10, characterized in that, The second end seat (150) is provided with a first gear (165) and a second gear (175). The first gear (165) is connected to the end of the male rotor (160), and the second gear (175) is connected to the end of the female rotor (170). The first gear (165) and the second gear (175) mesh with each other.

12. The screw compressor with centralized oil supply and return as described in claim 11, characterized in that, The vertical oil supply pipeline includes a first vertical oil supply pipe (1631), a second vertical oil supply pipe (1641), a third vertical oil supply pipe (1731), a fourth vertical oil supply pipe (1741), a fifth vertical oil supply pipe (1651), and a sixth vertical oil supply pipe (1751). The second vertical oil supply pipe (1641) and the fourth vertical oil supply pipe (1741) are located on the first end seat (140). The first vertical oil supply pipe (1631), the third vertical oil supply pipe (1731), the fifth vertical oil supply pipe (1651) and the sixth vertical oil supply pipe (1751) are provided on the second end seat (150). One end of the first vertical oil supply pipe (1631) is connected to the first horizontal oil supply pipe (1632), and the other end of the first vertical oil supply pipe (1631) is connected to the receiving cavity of the first bearing (163). One end of the second vertical oil supply pipe (1641) is connected to the third horizontal oil supply pipe (1732), and the other end of the second vertical oil supply pipe (1641) is connected to the receiving cavity of the second bearing (164). One end of the third vertical oil supply pipe (1731) is connected to the second horizontal oil supply pipe (1642), and the other end of the third vertical oil supply pipe (1731) is connected to the receiving cavity of the third bearing (173). One end of the fourth vertical oil supply pipe (1741) is connected to the fourth horizontal oil supply pipe (1742), and the other end of the fourth vertical oil supply pipe (1741) is connected to the receiving cavity of the fourth bearing (174). One end of the fifth vertical oil supply pipe (1651) is connected to the fifth horizontal oil supply pipe (1652), and the other end of the fifth vertical oil supply pipe (1651) is connected to the receiving cavity of the first gear (165). One end of the sixth vertical oil supply pipe (1751) is connected to the sixth horizontal oil supply pipe (1752), and the other end of the sixth vertical oil supply pipe (1751) is connected to the receiving cavity of the second gear (175).

13. The screw compressor with centralized oil supply and return as described in claim 12, characterized in that, The second vertical return oil pipe (1643) and the fourth vertical return oil pipe (1743) are provided on the first end seat (140). The first vertical return oil pipe (1633), the third vertical return oil pipe (1733), the fifth vertical return oil pipe (1653) and the sixth vertical return oil pipe (1753) are provided on the second end seat (150). The other end of the first vertical oil return pipe (1633) is connected to the receiving cavity of the first bearing (163), the other end of the second vertical oil return pipe (1643) is connected to the receiving cavity of the second bearing (164), the other end of the third vertical oil return pipe (1733) is connected to the receiving cavity of the third bearing (173), the other end of the fourth vertical oil return pipe (1743) is connected to the receiving cavity of the fourth bearing (174), the other end of the fifth vertical oil return pipe (1653) is connected to the receiving cavity of the first gear (165), and the other end of the sixth vertical oil return pipe (1753) is connected to the receiving cavity of the second gear (175).

14. The screw compressor with centralized oil supply and return as described in claim 5, characterized in that, The first oil tank (120) is provided with a first cover plate (121) and a first oil hole (122) is provided on the first cover plate (121). The second oil tank (130) is provided with a second cover plate (131) and a second oil hole (132) is provided on the second cover plate (131).

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