Active oil return system and electric compressor
By designing an active oil return system, directional lubrication of the electric compressor is achieved through an eccentric oil pump and lubrication channels, solving the problem of poor lubrication and improving lubrication efficiency and compressor operational reliability.
Patent Information
- Application Number
- CN202520683288.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-11
- Publication Date
- 2026-02-27
- Estimated Expiration
- 2035-04-11
AI Technical Summary
Existing compressors are prone to poor lubrication under extreme conditions, leading to bearing wear and functional failure, and thus failing to meet high-performance requirements.
An active oil return system is adopted, which drives the lubricating oil to circulate within the electric compressor through an eccentric oil pump, achieving directional lubrication and precise oil supply. This includes the design of components such as the oil sump, eccentric oil pump, lubrication channel, and oil return pipe within the cylinder.
It significantly reduces the chance of poor lubrication, improves the internal circulation efficiency of lubricating oil, ensures effective lubrication of each bearing, reduces wear, and guarantees the efficient and stable operation of the electric compressor.
Smart Images
Figure CN223952812U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to a compressor technical field more specifically, relate to a kind of initiative oil return system and electric compressor. BACKGROUND
[0002] With the continuous improvement of the performance requirements of compressor, the operating speed of compressor is also continuously improved, in order to ensure the normal operation of compressor, usually need to be lubricated by oil supply to the internal structure of compressor.
[0003] At present, the internal lubrication of compressor is mostly passive lubrication, that is, lubrication is carried out by means of compressor suction end refrigerant oil mist or splash lubrication. However, in extreme cases, passive lubrication is prone to poor lubrication, which leads to bearing wear of compressor and further causes the failure of the entire compressor. In view of the current situation of continuously improving performance requirements of compressor and accelerating operating speed, it is urgent to set up an active lubrication device to lubricate the compressor, so a new scheme is needed to solve the problem of poor lubrication of passive lubrication of existing compressor. SUMMARY
[0004] In view of the deficiencies in the prior art, the purpose of the utility model is to reduce the risk of poor lubrication of compressor by the structure.
[0005] The above technical purpose of the utility model is realized by the following technical scheme: an active oil return system, comprising a cylinder body, an oil pool is formed in the inner wall bottom of the cylinder body, an intake cavity is formed in one side of the cylinder body and communicates with the inside of the cylinder body, an eccentric oil pump is arranged in the intake cavity, a main shaft is arranged in the inside of the cylinder body, the eccentric oil pump is driven by the main shaft, the inlet of the eccentric oil pump communicates with the oil pool, a lubricating channel is formed in the main shaft, the outlet of the eccentric oil pump communicates with the lubricating channel, a plurality of liquid outlets for communicating with the lubrication area of the bearing are formed in the side wall of the lubricating channel.
[0006] The utility model is further provided that: the inlet of the eccentric oil pump is connected with an oil return pipe, one end of the oil return pipe away from the eccentric oil pump communicates with the oil pool.
[0007] The utility model is further provided that: one side of the cylinder body close to the intake cavity is electrically connected with a controller assembly, the oil return pipe is detachably connected on the cover plate of the controller assembly on one side of the intake cavity.
[0008] The utility model is further provided that: the oil return pipe is detachably connected with a filter assembly.
[0009] The utility model further sets up: first bearing is provided in the air inlet cavity, second bearing is provided in the cylinder body, the liquid outlet includes the oil hole one and oil hole two of setting in the lubricating passage lateral wall, the oil hole one and the lubrication area of first bearing intercommunication, the oil hole two and the lubrication area of second bearing intercommunication.
[0010] The utility model further sets up: the main shaft can detachably connect with counter weight, oil return channel is set up between the side surface of counter weight and second bearing, oil return channel and lubricating passage intercommunication.
[0011] The utility model discloses an electric compressor, including the active oil return system of any one of the preceding description, still include static disc and back cover, be provided with oil gas separation device between static disc and back cover, the liquid outlet of oil gas separation device and oil pool communicate through oil return channel.
[0012] The utility model further sets up: oil gas separation device sets up in the interior of back cover.
[0013] Summarized above, the utility model has following beneficial effect:
[0014] The utility model discloses the drive shaft of eccentric oil pump and electric compressor main shaft transmission connection, when electric compressor operation, the lubricating oil in oil pool is transported to lubricating passage, then is sent to the lubrication area in bearing respectively and carries out lubrication processing, and the whole active oil return system can carry out oil supply according to the operating condition of electric compressor, and the internal circulation efficiency of lubricating oil is greatly promoted, and the probability of poor lubrication is reduced significantly, and each bearing of electric compressor and other components are effectively lubricated. BRIEF DESCRIPTION OF DRAWINGS
[0015] Figure 1 It is the section of electric compressor in the utility model Figure 1 ;
[0016] Figure 2 It is the section of electric compressor in the utility model Figure 2
[0017] Figure 3 It is eccentric oil pump position structure schematic drawing;
[0018] Figure 4 It is static disc and back cover position structure schematic drawing.
[0019] In the figure: 1, cylinder; 2, oil pool; 3, intake cavity; 4, eccentric oil pump; 5, main shaft; 6, lubrication channel; 7, oil return pipe; 8, controller assembly; 9, filter assembly; 10, counterweight; 11, oil return channel; 12, static disc; 13, rear cover; 14, oil-gas separation device. DETAILED DESCRIPTION
[0020] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model; obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments, and all other embodiments obtained by those skilled in the art without creative labor based on the embodiments in the utility model belong to the protection scope of the utility model.
[0021] Embodiment 1:
[0022] As shown in Figure 1 and Figure 2 , an active oil return system comprises a cylinder 1, the inner wall bottom of the cylinder 1 is provided with an oil pool 2, one side of the cylinder 1 is provided with an intake cavity 3 communicating with the inside of the cylinder 1, the intake cavity 3 is provided with an eccentric oil pump 4, the inside of the cylinder 1 is provided with a main shaft 5, the eccentric oil pump 4 is driven by the main shaft 5, the inlet of the eccentric oil pump 4 communicates with the oil pool 2, the main shaft 5 is provided with a lubrication channel 6, the outlet of the eccentric oil pump 4 communicates with the lubrication channel 6, and the side wall of the lubrication channel 6 is provided with a plurality of liquid outlets for communicating with the lubrication areas of bearings.
[0023] In this embodiment, when the electric compressor is running, the main shaft 5 of the compressor drives the eccentric oil pump 4 to pump out the lubricating oil in the oil pool 2, and outputs from the outlet of the eccentric oil pump 4 into the lubrication channel 6 in the main shaft 5, and lubricates the lubrication areas through the liquid outlets, when the running speed of the electric compressor changes or the load changes, the oil amount of the lubricating oil will also change accordingly.
[0024] As shown in Figure 1 and Figure 3As shown, the inside of the cylinder body 1 is provided with a main shaft 5, the eccentric oil pump 4 is driven by the main shaft 5, the driving shaft of the eccentric oil pump 4 is in transmission connection with the main shaft 5, the main shaft 5 is provided with a lubricating channel 6 along the length direction of the central axis of the main shaft 5, the outlet of the eccentric oil pump 4 is in communication with the lubricating channel 6, the lubricating channel 6 provides a specific conveying path for the lubricating oil, ensuring that the lubricating oil can be accurately conveyed to the bearing and other parts that need to be lubricated, realizing directional lubrication, and the side wall of the lubricating channel 6 is provided with two liquid outlets for communicating with the lubricating area of the bearing, including oil outlet hole one and oil outlet hole two, the oil outlet hole one is in communication with the lubricating area of the first bearing located in the intake chamber 3, and the oil outlet hole two is in communication with the lubricating area of the second bearing located in the cylinder body 1, which can accurately convey the lubricating oil to the corresponding bearing part, realize accurate lubrication of the key components, and reduce the friction and wear of the bearing.
[0025] As shown in Figure 1 and Figure 2 , the main shaft 5 is provided with a counterweight 10, an oil return channel 11 is formed between the side surface of the counterweight 10 and the second bearing, the oil return channel 11 is in communication with the lubricating channel 6, and the oil return channel 11 is used for guiding the lubricating oil in the lubricating channel 6 to the third bearing located at the bottom of the dynamic disc, thereby lubricating the third bearing and further optimizing the path of the lubricating oil.
[0026] As shown in Figures 1-3 , the inlet of the eccentric oil pump 4 is in communication with the oil return pipe 7, and the end of the oil return pipe 7 away from the eccentric oil pump 4 is in communication with the oil pool 2, so that the excess lubricating oil can be guided back to the oil pool 2, avoiding the accumulation of too much lubricating oil in the system, preventing problems such as leakage and abnormal pressure caused by too much oil, and maintaining the balance of the amount of lubricating oil in the system.
[0027] As shown in Figures 1-3 , the oil return pipe 7 is provided with a filter assembly 9, which is a filter screen, capable of filtering the returned lubricating oil, removing impurities, particulate matter and the like, preventing impurities from re-entering the active oil return system and causing wear to the eccentric oil pump 4, bearings and other components, prolonging the service life of the components, facilitating stable operation of the active oil return system, and improving the reliability of the entire electric compressor.
[0028] Embodiment 2
[0029] As shown in Figures 1-4 , the present embodiment relates to an electric compressor, which comprises a dynamic disc formed on the compressor, a static disc 12, a rear cover 13, the above-mentioned active oil return system and an oil-gas separation device 14, wherein the active oil return system comprises a cylinder body 1, and the side of the cylinder body 1 close to the intake chamber 3 is electrically connected with a controller assembly 8, which ensures the stability and sufficiency of oil supply according to feedback information.
[0030] In the above embodiment, asFigure 1 and Figure 2 As shown in the figure, the inner wall bottom of the cylinder body 1 is provided with an oil pool 2, which serves as a storage area of lubricating oil and provides a stable oil source for lubrication of the whole system, ensuring that there is enough lubricating oil for lubrication of each part. One side of the cylinder body 1 is provided with an air inlet cavity 3 in communication with the inside thereof, and an eccentric oil pump 4 is arranged in the air inlet cavity 3. The inlet of the eccentric oil pump 4 is in communication with the oil pool 2. The outlet of the conventional eccentric pump is coaxial with the inlet. The outlet of the eccentric oil pump 4 of the utility model is located on the upper side of the cover plate of the controller assembly 8. The eccentric oil pump 4 extracts lubricating oil from the oil pool 2, so that the lubricating oil can smoothly enter the lubricating channel 6 and be delivered to the parts needing lubrication, thereby improving the lubrication effect.
[0031] In at least one embodiment, as shown in Figure 1 , Figure 2 and Figure 4 The oil-gas separation device 14 is arranged between the static disc 12 and the rear cover 13 and located inside the rear cover 13. In at least one embodiment, the oil-gas separation device 14 is arranged in the exhaust passage of the rear cover 13, and the outlet of the oil-gas separation device 14 is in communication with the oil pool 2 through the oil return channel 11.
[0032] In the above embodiment, the oil-gas separation device 14 is used to recover the lubricating oil mixed in the refrigerant. When high-pressure exhaust gas passes through the vent hole into the oil separation chamber of the exhaust passage, the oil collides with the outer wall of the oil-gas separation device 14. Under the action of centrifugal force, the lubricating oil is separated from the high-pressure exhaust gas. The separated lubricating oil falls to the bottom of the oil separation chamber due to gravity and returns to the oil pool 2 through the oil return channel 11. The oil-gas separation device 14 can effectively separate the oil-gas mixture discharged by the electric compressor and process the oil and gas separately, preventing the lubricating oil from entering the exhaust system and facilitating the recovery and reuse of the lubricating oil. By separating the oil and gas in time, the consumption and loss of the lubricating oil are reduced, and the overall operation efficiency of the electric compressor is improved.
[0033] In at least one embodiment, as shown in Figure 3 The oil return pipe 7 is installed on the cover plate of the controller assembly 8 located on one side of the air inlet cavity 3, which facilitates the disassembly, cleaning or replacement of the oil return pipe 7 when needed, keeps the oil return channel 11 unobstructed, and facilitates the maintenance and repair of the whole active oil return system.
[0034] In the description of the utility model, still need to explain, unless another explicit provision and limitation, term " set " " install " " link " " connection " should do broad sense understanding, for example, can be fixed connection, also can be detachable connection, or integrally connected;Can be mechanical connection, also can be electrical connection;Can be directly connected, also can indirectly connect through the intermediate medium, can be two elements inside the communication。For ordinary skilled person in the art, can understand the specific meaning of the above terms in the utility model according to specific circumstances.
[0035] The above only for the preferred embodiment of the utility model has been described in detail, although the foregoing embodiments of the utility model are described in detail, for those skilled in the art, it still can modify the technical scheme recorded in the foregoing each embodiment, or equivalent replacement to part of technical features。Any modification, equivalent replacement, improvement etc. within the spirit and principles of the utility model, should be included in the protection scope of the utility model.
Claims
1. An active oil return system comprising a cylinder block (1), characterised in that: The inner wall bottom of the cylinder (1) is provided with an oil pool (2), one side of the cylinder (1) is provided with an air inlet cavity (3) in communication with the inside of the cylinder (1), the air inlet cavity (3) is provided with an eccentric oil pump (4), the inside of the cylinder (1) is provided with a main shaft (5), the eccentric oil pump (4) is driven by the main shaft (5), the inlet of the eccentric oil pump (4) is in communication with the oil pool (2), the main shaft (5) is provided with a lubricating channel (6), the outlet of the eccentric oil pump (4) is in communication with the lubricating channel (6), and the side wall of the lubricating channel (6) is provided with a plurality of liquid outlets for communicating with the lubricating areas of the bearings.
2. An active oil return system according to claim 1, wherein: The driving shaft of the eccentric oil pump (4) is in transmission connection with the main shaft (5), the inlet of the eccentric oil pump (4) is connected with an oil return pipe (7), and the oil return pipe (7) is in communication with the oil pool (2) at the end away from the eccentric oil pump (4).
3. An active oil return system according to claim 2, wherein: The cylinder (1) is electrically connected with a controller assembly (8) on the side close to the air inlet cavity (3), and the oil return pipe (7) is detachably connected to the cover plate of the controller assembly (8) on the side of the air inlet cavity (3).
4. An active oil return system as claimed in claim 2, wherein: The oil return pipe (7) is detachably connected with a filter assembly (9).
5. The active oil return system of claim 1, wherein: The air inlet cavity (3) is provided with a first bearing, the cylinder (1) is provided with a second bearing, the liquid outlet comprises oil outlet holes one and two provided in the side wall of the lubricating channel (6), the oil outlet hole one is in communication with the lubricating area of the first bearing, and the oil outlet hole two is in communication with the lubricating area of the second bearing.
6. An active oil return system according to claim 5, wherein: The main shaft (5) is detachably connected with a counterweight (10), the side surface of the counterweight (10) and the second bearing are provided with an oil return channel (11), and the oil return channel (11) is in communication with the lubricating channel (6).
7. An electric compressor comprising an active oil return system according to any one of claims 2 to 6, characterized in that: Further comprising a static disc (12) and a rear cover (13), the static disc (12) and the rear cover (13) are provided with an oil-gas separation device (14), and the liquid outlet of the oil-gas separation device (14) is in communication with the oil pool (2) through the oil return channel (11).
8. The electric compressor of claim 7, wherein: The oil-gas separation device (14) is arranged in the inside of the rear cover (13).