High-power-density motor oil way system

Abstract

The utility model discloses a high-power-density motor oil way system which comprises a lubricating oil main system, a stator cavity oil way and a bearing chamber oil way. The lubricating oil main system comprises an oil supply pump, a pressure regulating valve, a one-way valve, a lubricating oil filter, a safety valve, a throttling nozzle and an oil-gas separator; the lubricating oil main system, the stator cavity oil way and the bearing chamber oil way jointly form a closed independent circulation structure. The lubricating oil main system is functionally divided into an oil supply path, an oil return path and a ventilation path, and a stator cavity, a front bearing chamber and a rear bearing chamber are mainly cooled and lubricated in a one-in and multi-out mode. Good cooling and lubricating effects are achieved, lubricating oil is in direct contact with internal components, and the heat dissipation efficiency is greatly improved; oil can be stably supplied and returned under different air pressures, temperatures and postures.

Description

TECHNICAL FIELD

[0001] The utility model belongs to motor technical field, and specifically is a kind of high power density motor oil circuit system. BACKGROUND

[0002] With the rapid development of new energy field, integrated oil cooling electric drive system has become one of the important trends of motor power density technology development with its compact structure and high efficiency characteristics.But the power limit capability of motor is often limited by the temperature rise limit of motor, so improving the cooling capacity of motor can significantly improve power density.

[0003] The advantage of oil cooling technology is that it is not conductive, not magnetic, has good insulation, can directly contact the internal components such as motor stator winding and bearing, reduces the requirements of bearing, oil seal, winding insulation and other parts, and can improve the heat dissipation efficiency, reduce the design and development cost, and make the product more competitive. SUMMARY

[0004] The utility model aims at at least one of the technical problems existing in the prior art.The utility model provides a kind of high power density motor oil circuit system.

[0005] To achieve the above-mentioned purpose, the utility model provides a kind of high power density motor oil circuit system, comprising: lubricating oil main system, stator cavity oil circuit, bearing chamber oil circuit;

[0006] The lubricating oil main system comprises: oil supply pump, pressure regulating valve, check valve, lubricating oil filter, safety valve, throttle nozzle and oil-gas separator;

[0007] The lubricating oil main system, stator cavity oil circuit and bearing chamber oil circuit together form a closed independent circulation structure;

[0008] The lubricating oil main system is divided into oil supply path, oil return path and ventilation path from the function, and adopts one-in and multiple-out mode to mainly cool and lubricate the stator cavity, front bearing chamber and rear bearing chamber.

[0009] Further, the stator cavity oil circuit is axially positioned by interference fit of stator cavity components and machine base, and the outlet of oil supply path machine base section oil circuit is directly opposite winding part through stop port, so as to facilitate heat dissipation.

[0010] Further, the stator cavity is connected by four transition joints and fasteners through front end cover, rear end cover and machine base, and stator sealing sleeve is used at inner circle of stator core to ensure the sealing effect of stator cavity.

[0011] Further, the bearing chamber oil circuit is divided into front bearing chamber oil supply path and rear bearing chamber oil supply path.

[0012] The front bearing chamber oil return path is located in the front end cover and is ensured by machining; the front bearing chamber component is connected with the front end cover, and the front end cover is connected with the machine base through two transition joints to ensure the oil path sealing property;

[0013] The rear bearing chamber oil supply path is located in the rear end cover and is ensured by machining; the rear bearing chamber component is connected with the rear end cover, and the rear end cover is also connected with the machine base through two transition joints to ensure the oil path sealing property.

[0014] Further, the bearing chamber oil path is branched from the machine base into the front end bearing chamber and the rear end bearing chamber, and the two bearing chambers are equipped with oil injection nozzles to spray oil to the bearing and the mechanical seal surface for lubrication and cooling, and the oil is returned to the oil tank through the stator cavity left oil return path and the stator cavity right oil return path.

[0015] Further, the oil supply ports of the front bearing chamber and the rear bearing chamber are connected with the one-way valve through a throttle nozzle;

[0016] The oil return port of the front bearing chamber is connected with a second coarse oil filter and a front bearing chamber oil return pump in sequence;

[0017] The oil return port of the rear bearing chamber is connected with a first coarse oil filter and a rear bearing chamber oil return pump in sequence;

[0018] The front bearing chamber oil return pump and the rear bearing chamber oil return pump are connected with the inlet of the radiator;

[0019] The outlet of the radiator is connected with the oil-gas separator installed on the oil tank.

[0020] Further, the oil supply pump and the pressure regulating valve are connected in parallel to form a first parallel structure, one end of the first parallel structure is connected with the oil tank, and the other end of the first parallel structure is connected with one end of a second parallel structure;

[0021] The second parallel structure is specifically composed of an oil filter and a safety valve connected in parallel;

[0022] The other end of the second parallel structure is connected with the one-way valve.

[0023] The utility model has the following beneficial effects:

[0024] 1. The utility model retains the advantages of oil cooling technology, has good cooling and lubricating effects through the one-in-multiple-out mode, and greatly improves the heat dissipation efficiency through direct contact of the oil with the internal components;

[0025] 2. The utility model considers the state of the motor under various environments, so that it can stably supply and return oil under different air pressures, temperatures and postures;

[0026] 3. The utility model discloses a full mechanical structure, high reliability, through the size of adjustment spare part and selection, can satisfy the motor life demand in the motor full working condition range. BRIEF DESCRIPTION OF DRAWINGS

[0027] In order to facilitate the person skilled in the art, the utility model will be further described below in conjunction with the drawings.

[0028] Figure 1 It is the principle diagram of the utility model oil circuit system;

[0029] Figure 2 It is the schematic diagram of the utility model oil circuit, back oil circuit;

[0030] Figure 3 It is the schematic diagram of the utility model ventilation path;

[0031] Figure 4 It is the schematic diagram of the utility model stator back oil circuit.

[0032] In the drawing: 1, oil supply pump;2, pressure regulating valve;3, oil filter;4, safety valve;5, throttle nozzle;6, throttle nozzle;7, stator cavity;8, front bearing chamber;9, rear bearing chamber;10, throttle nozzle;11, rear bearing chamber back oil pump;12, front bearing chamber back oil pump;13, first rough oil filter;14, second rough oil filter;15, radiator;16, oil gas separator;17, oil tank;18, check valve;rear end cover;102, first transition joint;103, machine base;104, second transition joint;105, front end cover;106, front bearing chamber part;107, third transition joint;108, stator cavity part;109, fourth transition joint;110, rear bearing chamber part;111, stator sealing sleeve;201, rear bearing chamber oil supply circuit;202, oil supply circuit machine base section oil circuit;203, front bearing chamber oil supply circuit;301, front bearing chamber back oil circuit;302, back oil circuit machine base section oil circuit;303, stator cavity back oil circuit;401, rear bearing chamber ventilation path;402, ventilation path machine base section circuit;403, front bearing chamber ventilation path;501, stator cavity left side back oil hole;502, stator cavity left side back oil circuit;503, stator cavity right side back oil hole;504, stator cavity right side back oil circuit;505, stator cavity back oil circuit;506, stator cavity oil discharge hole. DETAILED DESCRIPTION

[0033] The technical scheme of the utility model will be described below in conjunction with the embodiments, obviously, the described embodiments are only a part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art without making creative labor belong to the scope of protection of the utility model.

[0034] As Figure 1 shown, the principle diagram of the oil circuit system of the utility model, comprising:

[0035] the main system of lubricating oil, stator cavity oil circuit, bearing chamber oil circuit;

[0036] The main system of lubricating oil includes: oil pump 1, pressure regulating valve 2, check valve 18, lubricating oil filter 3, safety valve 4, throttle nozzle 5 and oil-gas separator 16; the main system of lubricating oil and stator cavity oil circuit, bearing chamber oil circuit jointly constitute closed independent circulation structure; the main system of lubricating oil is divided into three paths (as shown by the line) from the function of oil supply path, oil return path and ventilation path, which mainly cools and lubricates the stator cavity 7, front bearing chamber 8 and rear bearing chamber 9 in a one-in-multiple-out manner. Figure 1

[0037] Specifically:

[0038] The stator cavity oil circuit is in interference fit with the stator cavity component 108 and the base 103, and the axial positioning is completed through the stop port, so that the outlet of the oil supply path base section oil circuit is opposite the winding part, facilitating heat dissipation.

[0039] The stator cavity 7 is connected by the second transition joint 104, the first transition joint 102, the third transition joint 107, the fourth transition joint 109 and the fastener through the front end cover 105, the rear end cover 101 and the base 103, and the stator sealing sleeve 111 is used for sealing the inner circle of the stator core.

[0040] The bearing chamber oil circuit is divided into front bearing chamber oil supply circuit 203 and rear bearing chamber oil supply circuit 201; the front bearing chamber oil return circuit 301 is located in the front end cover 105 and is ensured by machining; the front bearing chamber component 106 is connected with the front end cover 105, and the front end cover 105 is connected with the base 103 through the second transition joint 104 and the third transition joint 107; the rear bearing chamber oil supply circuit 201 is located in the rear end cover 101 and is ensured by machining; the rear bearing chamber component 110 is connected with the rear end cover 101, and the rear end cover 101 is connected with the base 103 through the transition joint 102 and the transition joint 109; the lubricating oil of the bearing chamber oil circuit is introduced into the front bearing chamber and the rear bearing chamber from the two branches of the base 103 respectively, and the oil injection nozzles configured in the two bearing chambers are used to spray oil lubrication and cooling on the supporting bearing and the mechanical sealing surface, and then the lubricating oil is returned to the oil tank 17 through the stator cavity left oil return circuit 502 and the stator cavity right oil return circuit 504 and the stator cavity oil return circuit 505 respectively.

[0041] ​The oil supply ports of both the front bearing chamber 8 and the rear bearing chamber 9 are connected to a one-way valve 18 via a throttle nozzle; the oil return port of the front bearing chamber 8 is connected in sequence to a second coarse oil filter 14 and a front bearing chamber oil return pump 12; the oil return port of the rear bearing chamber 9 is connected in sequence to a first coarse oil filter 13 and a rear bearing chamber oil return pump 11; the front bearing chamber oil return pump 12 and the rear bearing chamber oil return pump 11 are simultaneously connected to the inlet of the radiator 15; the outlet of the radiator 15 is connected to the oil-gas separator 16 installed in the lubricating oil tank 17 to achieve the purpose of oil return.

[0042] The oil supply pump 1 and the pressure regulating valve 2 are connected in parallel to form a first parallel structure. One end of the first parallel structure is connected to the lubricating oil tank 17, and the other end of the first parallel structure is connected to one end of the second parallel structure. The second parallel structure is specifically composed of the lubricating oil filter 3 and the safety valve 4 connected in parallel. The other end of the second parallel structure is connected to the one-way valve 18 to achieve the purpose of controllable oil supply.

[0043] A specific embodiment of the present invention:

[0044] Please see Figures 1 to 4 The lubricating oil starts from the oil supply pump 1, passes through the lubricating oil filter 3, and enters the motor through the oil inlet hole of the rear end cover 101. At the same time, the lubricating oil is divided into three parts: one part enters the rear bearing chamber from the rear bearing chamber oil supply line 201 to provide cooling and lubrication for the rear bearing chamber component 110; another part enters the stator cavity from the oil supply line frame section oil line 202 to provide cooling for the stator cavity component 108; and the third part continues forward, entering the front bearing chamber from the front bearing chamber oil supply line 203 to provide cooling and lubrication for the front bearing chamber component 106.

[0045] In the oil return section, the front bearing housing of the motor is equipped with an oil return collection chamber, which can accept oil return from all circumferential directions. The collected lubricating oil flows along the front bearing housing oil return path 301 and the oil return path frame section oil path 302, passes through the coarse oil filter 14 and the front bearing housing lubricating oil pump 12, and discharges excess heat in the radiator 15. Finally, it returns to the lubricating oil tank 17 through the oil-gas separator 16. After sufficient heat exchange, the lubricating oil in the stator cavity enters the stator cavity oil return path 303 from the rear end of the stator cavity, that is, it enters the stator cavity left side oil return path 502 from the stator cavity left side oil return hole 501 and the stator cavity right side oil return path 504 from the stator cavity right side oil return hole 503. It gathers in the stator cavity oil return path 505 and is discharged from the stator cavity drain hole 506. After passing through the throttle nozzle 10, the radiator 15, and the oil-gas separator 16, it finally flows into the lubricating oil tank 17.

[0046] In terms of ventilation, the front bearing chamber and the rear bearing chamber are connected to the lubricating oil tank 17 through the front bearing chamber ventilation road 403, the ventilation road base section circuit 402, and the rear bearing chamber ventilation road 401 to ensure that the air pressure of each part is consistent, thereby ensuring a continuous and stable supply of lubricating oil.

[0047] The above embodiments are only used to illustrate the technical methods of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical methods of this utility model without departing from the spirit and scope of the technical methods of this utility model.

Claims

1. A high power density motor hydraulic circuit system, characterized in that, include: Lubricating oil main system, stator cavity oil circuit, bearing chamber oil circuit; The main lubricating oil system includes: an oil supply pump (1), a pressure regulating valve (2), a one-way valve (18), an oil filter (3), a safety valve (4), a throttle nozzle (5), and an oil-gas separator (16). The main lubricating oil system, together with the stator cavity oil circuit and the bearing chamber oil circuit, forms a closed-loop independent circulation structure. The main lubricating oil system is functionally divided into three circuits: oil supply circuit, oil return circuit, and ventilation circuit. It adopts a one-in-multiple-out method to mainly cool and lubricate the stator cavity (7), front bearing chamber (8), and rear bearing chamber (9).

2. The high power density motor hydraulic circuit system according to claim 1, characterized in that, The stator cavity oil route is interference-fitted between the stator cavity component (108) and the base (103), and is axially positioned by means of a stop.

3. The high power density motor hydraulic circuit system according to claim 1, characterized in that, The stator cavity (7) is connected to the base (103) by the front end cover (105), the rear end cover (101), and the fasteners through the second transition joint (104), the first transition joint (102), the third transition joint (107), and the fourth transition joint (109). The inner circle of the stator core is sealed with a stator sealing sleeve (111).

4. The high power density motor hydraulic circuit system according to claim 1, characterized in that, The bearing chamber oil circuit is divided into a front bearing chamber oil supply circuit (203) and a rear bearing chamber oil supply circuit (201). The front bearing housing oil return passage (301) is located in the front cover (105); the front bearing housing component (106) is connected to the front cover (105), and the front cover (105) is connected to the base (103) through the second transition joint (104) and the third transition joint (107); The rear bearing housing oil supply line (201) is located in the rear end cover (101); the rear bearing housing component (110) is connected to the rear end cover (101), and the rear end cover (101) is connected to the machine base (103) through the first transition joint (102) and the fourth transition joint (109).

5. A high power density motor hydraulic circuit system according to claim 4, characterized in that, The lubricating oil in the bearing chamber oil circuit is introduced into the front bearing chamber and the rear bearing chamber from two branches of the machine base (103), respectively. The oil is sprayed to lubricate and cool the support bearing and mechanical seal surface with the oil nozzles configured in both bearing chambers. The oil is then returned to the lubricating oil tank (17) through the left return oil circuit (502) and the right return oil circuit (504) of the stator cavity, respectively, and then through the stator cavity return oil circuit (505).

6. A high power density motor hydraulic circuit system according to claim 1, characterized in that, The oil supply ports of the front bearing chamber (8) and the rear bearing chamber (9) are both connected to a one-way valve (18) through a throttle nozzle. The oil return port of the front bearing chamber (8) is connected in sequence to a second coarse oil filter (14) and a front bearing chamber oil return pump (12). The oil return port of the rear bearing chamber (9) is connected in sequence to a first coarse oil filter (13) and a rear bearing chamber oil return pump (11). The front bearing housing return oil pump (12) and the rear bearing housing return oil pump (11) are both connected to the inlet of the radiator (15); The outlet of the radiator (15) is connected to the oil-gas separator (16) installed in the lubricating oil tank (17).

7. A high power density motor hydraulic circuit system according to claim 1, characterized in that, The oil supply pump (1) and the pressure regulating valve (2) are connected in parallel to form a first parallel structure. One end of the first parallel structure is connected to the lubricating oil tank (17), and the other end of the first parallel structure is connected to one end of the second parallel structure. The second parallel structure is specifically composed of an oil filter (3) and a safety valve (4) connected in parallel; The other end of the second parallel structure is connected to a one-way valve (18).

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