An integrated lubrication method for ultra-compact high-speed centrifugal compressors

Abstract

The application provides an integrated lubricating method for an ultra-compact high-speed centrifugal compressor, and belongs to the technical field of centrifugal compressors.The ultra-compact high-speed centrifugal compressor comprises a high-speed permanent magnet synchronous motor, a gear speed-increasing box, a pneumatic working element and an oil filter, the high-speed permanent magnet synchronous motor is fixedly connected with the gear speed-increasing box, the gear speed-increasing box is fixedly connected with the pneumatic working element, the oil filter is fixedly arranged on the high-speed permanent magnet synchronous motor, the high-speed permanent magnet synchronous motor is provided with a motor casing, the motor casing is provided with a motor casing oil flow channel, the high-speed permanent magnet synchronous motor is communicated with the oil filter through a motor oil circuit collection block, the oil filter is communicated with the gear speed-increasing box, the high-speed permanent magnet synchronous motor is provided with a motor oil inlet, and the gear speed-increasing box is provided with an oil pressure sensor and an oil temperature sensor.The high-speed centrifugal compressor is compact in structure, can reduce the risk of oil leakage at pipelines and pipe joints, and is simple and beautiful in appearance.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of centrifugal compressor, in particular to an integrated lubrication method for super-compact high-speed centrifugal compressor. BACKGROUND

[0002] The high-speed centrifugal compressor is a key equipment of industrial equipment. The super-compact high-speed centrifugal compressor driven by gears integrates a high-speed permanent magnet synchronous motor, a gear speed-increasing box and a pneumatic working element as a whole unit, has a compact structure, a small size and a low manufacturing cost. The high-speed permanent magnet synchronous motor and the gear speed-increasing box are cooled and lubricated by clean lubricating oil when they are in high-speed operation.

[0003] The high-speed permanent magnet synchronous motor is cooled by an oil-cooled motor shell. After flowing through a heat dissipation flow channel of the motor shell of the high-speed permanent magnet synchronous motor, the lubricating oil passes through a high-precision oil filter, filters impurities in the oil and then enters the gear speed-increasing box to be lubricated and cooled. The motor, the oil filter and the gear speed-increasing box are connected by oil pipes, and there is a risk of lubricating oil leakage at the pipe joints. In addition, the arrangement of the oil pipes affects the appearance of the whole machine. Therefore, it is necessary to provide an integrated lubrication method for the super-compact high-speed centrifugal compressor. SUMMARY

[0004] The present application aims to provide an integrated lubrication method for a super-compact high-speed centrifugal compressor, which solves the technical problems of lubricating oil leakage at the pipe joints and the influence of the external oil pipes of the lubrication system on the appearance of the whole machine. The high-speed centrifugal compressor provided by the present application has a compact structure, a simple and beautiful appearance, is safe and reliable, and is suitable for wide use.

[0005] In order to achieve the above-mentioned purpose, the technical scheme adopted by the present application is as follows:

[0006] A super-compact high-speed centrifugal compressor comprises a high-speed permanent magnet synchronous motor, a gear speed-increasing box, a pneumatic working element and an oil filter. The high-speed permanent magnet synchronous motor is fixedly connected with the gear speed-increasing box, the gear speed-increasing box is fixedly connected with the pneumatic working element, and the oil filter is fixedly arranged on the high-speed permanent magnet synchronous motor. The high-speed permanent magnet synchronous motor is provided with a motor shell, and a motor shell oil flow channel is arranged in the motor shell. The high-speed permanent magnet synchronous motor is in communication with the oil filter through a motor oil collection block. The oil filter is in communication with the gear speed-increasing box. An oil inlet is arranged on the high-speed permanent magnet synchronous motor. The gear speed-increasing box is provided with a gear speed-increasing box oil return hole, a lubricating oil pressure sensor and a lubricating oil temperature sensor.

[0007] Further, the motor oil collection block is provided with a motor oil outlet and a motor and gear speed-increasing box oil inlet. The motor oil outlet is in communication with the oil filter and one end of the motor shell oil flow channel, respectively. The motor and gear speed-increasing box oil inlet is in communication with the oil filter.

[0008] Further, the high-speed permanent magnet synchronous motor is provided with a motor oil inlet flange on one side, and a motor oil inlet is arranged on the motor oil inlet flange.

[0009] Further, the motor oil circuit collection block is arranged on one side of the high-speed permanent magnet synchronous motor, and the lubricating oil filter is fixedly connected to the motor oil circuit collection block by external screws.

[0010] Further, the lubricating oil filter is provided with a filter oil inlet and a filter oil outlet, the filter oil inlet is communicated with the motor oil outlet, an O-shaped rubber sealing ring is arranged between the communication positions of the filter oil inlet and the motor oil outlet, the filter oil outlet is communicated with the motor and the gear speed-up box oil inlet, and an O-shaped rubber sealing ring is arranged between the communication positions of the filter oil outlet and the motor and the gear speed-up box oil inlet.

[0011] Further, the gear speed-up box comprises a gear speed-up box body and a gear speed-up box cover, the gear speed-up box cover is arranged on the gear speed-up box body, and oil holes are arranged in the interiors of the gear speed-up box body and the gear speed-up box cover.

[0012] Further, the gear speed-up box body is provided with a gear speed-up box oil inlet, the gear speed-up box oil inlet is communicated with the motor and the gear speed-up box oil inlet, an O-shaped rubber sealing ring is arranged between the communication positions of the gear speed-up box oil inlet and the motor and the gear speed-up box oil inlet, the lubricating oil pressure sensor and the lubricating oil temperature sensor are arranged on the gear speed-up box body, and the lubricating oil pressure sensor and the lubricating oil temperature sensor are communicated with the gear speed-up box oil inlet.

[0013] Further, the gear speed-up box body is provided with a gear speed-up box oil return port, the gear speed-up box oil return port is communicated with the gear speed-up box oil inlet and an external oil tank respectively, and an O-shaped rubber sealing ring is arranged between the communication positions of the gear speed-up box oil return port and the external oil tank.

[0014] An integrated lubrication method for an ultra-compact high-speed centrifugal compressor, comprising the following steps:

[0015] (1) Start the high-speed centrifugal compressor, lubricating oil flows into the high-speed permanent magnet synchronous motor through the motor oil inlet, flows through the lubricating oil flow channel of the motor shell, and then flows out of the high-speed permanent magnet synchronous motor through the motor oil outlet after cooling the high-speed permanent magnet synchronous motor;

[0016] (2) The lubricating oil flowing out of the high-speed permanent magnet synchronous motor flows into the lubricating oil filter through the filter oil inlet, and then flows through the filter element of the lubricating oil filter, so that the filter element filters out iron filings, impurities and the like in the lubricating oil, and clean lubricating oil flows out through the filter oil outlet;

[0017] (3) The lubricating oil flowing out of the oil outlet of the oil filter flows into the oil inlet of the motor and the gear speed-up box, the lubricating oil flowing out of the oil inlet of the motor and the gear speed-up box flows into the gear speed-up box, after the lubricating oil flows through the oil hole inside the gear speed-up box, the lubricating oil lubricates and cools the gears and bearings and other precision parts inside the gear speed-up box, and finally the lubricating oil flows into the external oil tank through the oil return port of the gear speed-up box.

[0018] The present application has the following beneficial effects due to the adoption of the above technical solutions:

[0019] 1. The high-speed permanent magnet synchronous motor, the gear speed-up box and the oil filter are arranged in an integrated structure, which is compact, safe and reliable, effectively reduces the external oil pipes and pipe joints of the lubricating system, thereby reducing the risk of oil leakage at the pipes and pipe joints, reducing the cost of the lubricating pipeline, and the appearance of the whole machine is simple and beautiful.

[0020] 2. The oil filter of the present application adopts a plate type mounting interface and is fixed on the high-speed permanent magnet synchronous motor through screws, and the oil filter is simple to install and dismount, and the filter element is convenient to replace.

[0021] 3. The O-shaped rubber sealing ring is used for reliable sealing between the oil port communication portions, there is no external oil pipe and pipe joint connection, and the lubricating oil realizes the heat dissipation and cooling of the high-speed permanent magnet synchronous motor, the oil filtering of the oil filter and the lubrication and heat dissipation and cooling of the gear speed-up box through the internal pipeline.

[0022] 4. The lubricating system pipeline of the present application is simple, and the problems of oil leakage, pipeline aging and poor maintenance of the lubricating oil cooling of the high-speed centrifugal compressor are solved. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 is a structural schematic view of the high-speed centrifugal compressor of the present application;

[0024] Figure 2 is a sectional view of the high-speed permanent magnet synchronous motor of the present application;

[0025] Figure 3 is a sectional view of the high-speed permanent magnet synchronous motor and the gear speed-up box of the present application.

[0026] In the drawings, 1 is a high-speed permanent magnet synchronous motor, 11 is a motor oil inlet flange, 12 is a motor oil circuit collection block, 13 is a motor casing, 101 is a motor oil inlet, 102 is a motor casing lubricating oil flow channel, 103 is a motor oil outlet, 104 is a motor and gear speed-increasing box oil inlet, 2 is a gear speed-increasing box, 21 is a gear speed-increasing box body, 22 is a gear speed-increasing box cover, 201 is a gear speed-increasing box oil return port, 202 is a gear speed-increasing box oil inlet, 3 is a pneumatic working element, 4 is a lubricating oil filter, 401 is a filter oil inlet, 402 is a filter oil outlet, 5 is a lubricating oil pressure sensor, 6 is a lubricating oil temperature sensor, and 7 is an O-shaped rubber sealing ring. DETAILED DESCRIPTION

[0027] To make the objectives, technical solutions and advantages of the present application clearer, further detailed description will be made below with reference to the drawings and preferred embodiments. However, it should be noted that many details listed in the description are only to make the reader have a thorough understanding of one or more aspects of the present application, and the aspects of the present application can be realized even without these specific details.

[0028] As shown in Figures 1-3 , a super-compact high-speed centrifugal compressor includes a high-speed permanent magnet synchronous motor 1, a gear speed-increasing box 2, a pneumatic working element 3 and a lubricating oil filter 4. The high-speed permanent magnet synchronous motor 1 is fixedly connected with the gear speed-increasing box 2, the gear speed-increasing box 2 is fixedly connected with the pneumatic working element 3, and the lubricating oil filter 4 is fixedly arranged on the high-speed permanent magnet synchronous motor 1. The high-speed permanent magnet synchronous motor 1, the gear speed-increasing box 2 and the lubricating oil filter 4 are arranged as an integrated structure. The high-speed permanent magnet synchronous motor 1 is provided with a motor casing 13, and the motor casing 13 is provided with a motor casing lubricating oil flow channel 102. The high-speed permanent magnet synchronous motor 1 is in communication with the lubricating oil filter 4 through a motor oil circuit collection block 12. The lubricating oil filter 4 is in communication with the gear speed-increasing box 2. The high-speed permanent magnet synchronous motor 1 is provided with a motor oil inlet 101, and the gear speed-increasing box 2 is provided with a lubricating oil pressure sensor 5 and a lubricating oil temperature sensor 6. The high-speed permanent magnet synchronous motor 1, the gear speed-increasing box 2 and the lubricating oil filter 4 of the present application are arranged as an integrated structure, which is compact, safe and reliable. The external oil pipes and pipe joints of the lubricating system are effectively reduced, thereby reducing the lubricating oil leakage risk at the pipes and pipe joints, reducing the cost of the lubricating pipes, and making the appearance of the whole machine simple and beautiful.

[0029] As shown in Figure 1As shown, the high-speed permanent magnet synchronous motor 1 is provided with a motor oil inlet flange 11 on one side, and the motor oil inlet 101 is arranged on the motor oil inlet flange 11. The motor oil collection block 12 is arranged on one side of the high-speed permanent magnet synchronous motor 1, the oil filter 4 adopts a plate type mounting interface, and the oil filter 4 is fixedly connected to the motor oil collection block 12 through external screws; the motor oil inlet 101 and the motor oil collection block 12 are arranged on the same side of the high-speed permanent magnet synchronous motor 1. The oil filter 4 of the present application adopts a plate type mounting interface and is fixed on the high-speed permanent magnet synchronous motor 1 through screws, and the oil filter 4 is simple to install and disassemble, and convenient to replace the filter element.

[0030] As shown in Figure 2 As shown, the motor oil collection block 12 is respectively provided with a motor oil outlet 103 and a motor and gear speed-up box oil inlet 104, the motor oil outlet 103 is respectively communicated with the oil filter 4 and one end of the motor housing oil flow channel 102, and the motor and gear speed-up box oil inlet 104 is communicated with the oil filter 4. The lubricating oil flows into the high-speed permanent magnet synchronous motor 1 through the motor oil inlet 101, flows through the motor housing oil flow channel 102, and the lubricating oil cools the high-speed permanent magnet synchronous motor 1, and then flows out of the high-speed permanent magnet synchronous motor 1 through the motor oil outlet 103. The oil filter 4 is provided with a filter oil inlet 401 and a filter oil outlet 402, the filter oil inlet 401 is communicated with the motor oil outlet 103, an O-shaped rubber sealing ring 7 is arranged between the filter oil inlet 401 and the motor oil outlet 103, the filter oil outlet 402 is communicated with the motor and gear speed-up box oil inlet 104, and an O-shaped rubber sealing ring 7 is arranged between the filter oil outlet 402 and the motor and gear speed-up box oil inlet 104. The lubricating oil flowing out of the high-speed permanent magnet synchronous motor 1 flows into the oil filter 4 through the filter oil inlet 401, the lubricating oil flows through the filter element of the oil filter 4, the filter element filters out iron filings, impurities and the like in the oil, and the clean lubricating oil flows out of the filter oil outlet 402.

[0031] As shown in Figure 3As shown, the gear speed-increasing box 2 comprises a gear speed-increasing box body 21 and a gear speed-increasing box cover 22, the gear speed-increasing box cover 22 is arranged on the gear speed-increasing box body 21, and the inside of the gear speed-increasing box body 21 and the gear speed-increasing box cover 22 is provided with an oil hole. The gear speed-increasing box body 21 is provided with a gear speed-increasing box oil inlet 202, the gear speed-increasing box oil inlet 202 is communicated with the motor and the gear speed-increasing box oil inlet 104, and an O-shaped rubber sealing ring 7 is arranged between the communication position of the gear speed-increasing box oil inlet 202 and the motor and the gear speed-increasing box oil inlet 104. The oil pressure sensor 5 and the oil temperature sensor 6 are arranged on the gear speed-increasing box body 21, and the oil pressure sensor 5 and the oil temperature sensor 6 are communicated with the gear speed-increasing box oil inlet 202, so as to monitor the oil pressure and the oil temperature of the lubricating oil in real time. The gear speed-increasing box body 21 is provided with a gear speed-increasing box oil return port 201, the gear speed-increasing box oil return port 201 is communicated with the gear speed-increasing box oil inlet 202 and an external oil tank respectively, and an O-shaped rubber sealing ring 7 is arranged between the communication position of the gear speed-increasing box oil return port 201 and the external oil tank. The lubricating oil flows into the gear speed-increasing box oil inlet 202 of the gear speed-increasing box 2 from the motor and the gear speed-increasing box oil inlet 104, and after flowing through the oil hole in the inside of the gear speed-increasing box 2, the lubricating oil lubricates and cools the gears, bearings and other precision parts in the inside of the gear speed-increasing box 2, and finally flows into the oil tank from the gear speed-increasing box oil return port 201. The O-shaped rubber sealing ring 7 is arranged between the communication positions of the oil ports of the present application, and the lubricating oil realizes the lubrication and cooling of the high-speed permanent magnet synchronous motor 1 and the gear speed-increasing box 2 through the internal pipeline, and the lubricating oil is kept clean through the oil filter 4 between the high-speed permanent magnet synchronous motor 1 and the gear speed-increasing box 2.

[0032] An integrated lubrication method for an ultra-compact high-speed centrifugal compressor, comprising the following steps:

[0033] (1) Start the high-speed centrifugal compressor, the lubricating oil flows into the high-speed permanent magnet synchronous motor 1 from the motor oil inlet 101, flows through the motor shell oil flow channel 102, and then flows out of the high-speed permanent magnet synchronous motor 1 from the motor oil outlet 103 after cooling the high-speed permanent magnet synchronous motor 1;

[0034] (2) The lubricating oil flowing out of the high-speed permanent magnet synchronous motor 1 flows into the oil filter 4 from the filter oil inlet 401, and then flows out of the filter oil outlet 402 after the filter core of the oil filter 4 filters out the iron filings and impurities in the lubricating oil;

[0035] (3) The lubricating oil flowing out of the oil outlet 402 of the oil filter flows into the motor and gear speed-up box inlet 104, and the lubricating oil flowing out of the motor and gear speed-up box inlet 104 flows into the gear speed-up box 2 through the gear speed-up box inlet 202. After flowing through the oil hole inside the gear speed-up box 2, the lubricating oil lubricates and cools the precision parts such as gears and bearings inside the gear speed-up box 2, and finally the lubricating oil flows into the external oil tank through the gear speed-up box oil return port 201.

[0036] The present application takes into account the operability, maintainability, sealing reliability, manufacturing cost, pipeline layout, and overall appearance of the lubricating system of the ultra-compact high-speed centrifugal compressor. The lubricating pipeline between the traditional motor and the oil filter and the oil filter and the gear speed-up box is cancelled. The oil filter 4, the high-speed permanent magnet synchronous motor 1, and the gear speed-up box 2 are designed in an integrated manner. The high-speed permanent magnet synchronous motor 1 and the gear speed-up box 2 are designed with internal oil holes. The high-speed permanent magnet synchronous motor 1 and the gear speed-up box 2 are lubricated and cooled by clean lubricating oil. The lubricating system pipeline is simple, which greatly reduces the risk of oil pipe and pipe joint aging, oil leakage, and other risks, and reduces the cost of the lubricating pipeline. The problem of independent installation and support of the oil filter 4 is solved, and the problems of oil leakage, pipeline aging, and poor maintainability of the high-speed centrifugal compressor using lubricating oil cooling are solved. The oil filter is easy to install and replace the filter element, and the overall appearance of the machine is simple and beautiful.

[0037] The above only describes the preferred embodiments of the present application. It should be noted that for ordinary skilled persons in the art, without departing from the principles of the present application, several improvements and refinements can be made, which should also be considered as the protection scope of the present application.

Claims

1. An ultra-compact high-speed centrifugal compressor, characterized in that: The system includes a high-speed permanent magnet synchronous motor (1), a gearbox (2), a pneumatic power-operating element (3), and an oil filter (4). The high-speed permanent magnet synchronous motor (1) is fixedly connected to the gearbox (2), and the gearbox (2) is fixedly connected to the pneumatic power-operating element (3). The oil filter (4) is fixedly installed on the high-speed permanent magnet synchronous motor (1). The high-speed permanent magnet synchronous motor (1) is provided with a motor housing (13). The motor housing (13) is provided with a motor housing oil flow channel (102). The high-speed permanent magnet synchronous motor (1) is connected to the oil filter (4) through a motor oil circuit manifold (12). The oil filter (4) is connected to the gearbox (2). The high-speed permanent magnet synchronous motor (1) is provided with a motor oil inlet (101). The gearbox (2) is provided with an oil pressure sensor (5) and an oil temperature sensor (6). The motor oil circuit assembly block (12) is provided with a motor oil outlet (103) and a motor and gear gearbox oil inlet (104). The motor oil outlet (103) is connected to one end of the lubricating oil filter (4) and the lubricating oil flow channel (102) of the motor housing, and the motor and gear gearbox oil inlet (104) is connected to the lubricating oil filter (4).

2. The ultra-compact high-speed centrifugal compressor according to claim 1, characterized in that: A motor oil inlet flange (11) is provided on one side of the high-speed permanent magnet synchronous motor (1), and the motor oil inlet (101) is provided on the motor oil inlet flange (11).

3. The ultra-compact high-speed centrifugal compressor according to claim 1, characterized in that: The motor oil circuit assembly block (12) is set on one side of the high-speed permanent magnet synchronous motor (1), and the lubricating oil filter (4) is fixedly connected to the motor oil circuit assembly block (12) by external screws.

4. The ultra-compact high-speed centrifugal compressor according to claim 1, characterized in that: The lubricating oil filter (4) is provided with a filter inlet (401) and a filter outlet (402). The filter inlet (401) is connected to the motor outlet (103). An O-ring rubber seal (7) is provided between the filter inlet (401) and the motor outlet (103). The filter outlet (402) is connected to the motor and gearbox inlet (104). An O-ring rubber seal (7) is provided between the filter outlet (402) and the motor and gearbox inlet (104).

5. The ultra-compact high-speed centrifugal compressor according to claim 1, characterized in that: The gear speed increaser (2) includes a gear speed increaser housing (21) and a gear speed increaser housing cover (22). The gear speed increaser housing cover (22) is installed on the gear speed increaser housing (21). Oil holes are provided inside the gear speed increaser housing (21) and the gear speed increaser housing cover (22).

6. The ultra-compact high-speed centrifugal compressor according to claim 5, characterized in that: The gearbox housing (21) is provided with a gearbox oil inlet (202), which is connected to the motor and gearbox oil inlet (104). An O-ring rubber seal (7) is provided between the gearbox oil inlet (202) and the motor and gearbox oil inlet (104). The lubricating oil pressure sensor (5) and the lubricating oil temperature sensor (6) are provided on the gearbox housing (21), and the lubricating oil pressure sensor (5) and the lubricating oil temperature sensor (6) are connected to the gearbox oil inlet (202).

7. The ultra-compact high-speed centrifugal compressor according to claim 4, characterized in that: The gearbox housing (21) is provided with a gearbox oil return port (201), which is connected to the gearbox oil inlet (202) and the external oil tank respectively. An O-ring rubber seal (7) is provided between the gearbox oil return port (201) and the external oil tank.

8. The integrated lubrication method for an ultra-compact high-speed centrifugal compressor according to claim 1, characterized in that: Includes the following steps: (1) Start the high-speed centrifugal compressor. The lubricating oil flows into the high-speed permanent magnet synchronous motor (1) through the motor oil inlet (101), flows through the motor housing lubricating oil channel (102), and after the lubricating oil cools the high-speed permanent magnet synchronous motor (1), it flows out of the high-speed permanent magnet synchronous motor (1) through the motor oil outlet (103). (2) The lubricating oil flowing out of the high-speed permanent magnet synchronous motor (1) flows into the lubricating oil filter (4) through the oil inlet (401). After the lubricating oil flows through the filter element of the lubricating oil filter (4), the filter element filters out iron filings and impurities in the lubricating oil, and the clean lubricating oil flows out through the oil outlet (402). (3) The lubricating oil flowing out of the filter outlet (402) flows into the motor and gear gearbox inlet (104), and the lubricating oil flowing out of the motor and gear gearbox inlet (104) flows into the gear gearbox (2) through the gear gearbox inlet (202). After the lubricating oil flows through the oil hole inside the gear gearbox (2), it lubricates and cools the gears and bearings inside the gear gearbox (2). Finally, the lubricating oil flows into the external oil tank through the gear gearbox return port (201). Among them, the motor oil outlet (103) and the motor and gear speed increaser oil inlet (104) are respectively set on the motor oil circuit assembly block (12); The filter inlet (401) and filter outlet (402) are respectively located on the lubricating oil filter (4); The gear speed increaser (2) includes a gear speed increaser housing (21) and a gear speed increaser housing cover (22). The gear speed increaser oil return port (201) and the gear speed increaser oil inlet (202) are respectively located on the gear speed increaser housing (21).

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