CN107394966A - Exhaust device and motor oil cooling device - Google Patents

Abstract

The present invention provides an exhaust device and a motor oil cooling device, the exhaust device includes a pressure oil tank, the pressure oil tank is provided with an oil filling port, an oil outlet and an oil return port, a gas collecting pipe is provided at the top of the pressure oil tank, a liquid level switch I is provided in the gas collecting pipe, an exhaust solenoid valve for exhausting the gas in the gas collecting pipe is provided above the liquid level switch I, the liquid level switch I is connected to a controller, and the exhaust solenoid valve is controlled by the controller. In the exhaust device provided by the present invention, since the diameter of the gas collecting pipe itself is small and the surface area of the oil is small, the volume of the oil discharged when the oil level in the gas collecting pipe drops is also relatively small; the top wall of the pressure oil tank is inclined upward from the end to the gas collecting pipe, and a small amount of air brought into the pressure oil tank can be acted on by buoyancy to rise in the pressure oil tank to the top slope of the pressure oil tank, and then flow into the gas collecting pipe along the slope and be discharged in time; the motor oil cooling device can accurately control the oil level in the motor.

Description

An exhaust device and a motor oil cooling device

technical field

The invention belongs to the field of motor oil cooling equipment, and in particular relates to an exhaust device and a motor oil cooling device.

Background technique

Oil-cooled motors are usually open-ended. The oil pump that supplies oil with the temperature and flow required by the oil-cooled motor cannot provide the pressure required for the motor to return oil in the motor, and the oil return line is very narrow, so the oil in the oil-cooled motor cannot Rapid discharge by gravity. Therefore, the existing oil cooling equipment adopts an oil pump to supply oil to the oil cooling motor, and an oil pump sucks the oil in the cavity of the oil cooling motor. However, oil cooling needs to maintain a certain oil level in the cavity. The two oil pumps responsible for oil supply and oil return cannot maintain the same flow rate. The accumulation of a small flow difference over time will also affect the stability of the oil level in the motor. The work of the oil pump also needs to change the oil level in the oil-cooled motor cavity so that the sensor sends a signal to correct the deviation of the oil return pump, which cannot satisfy the control of the oil level in the motor, especially in the laboratory test. control.

Contents of the invention

In view of this, the present invention aims to propose an exhaust device and a motor oil cooling device to solve the problem that the existing equipment is difficult to precisely control the oil level in the motor.

In order to achieve the above object, technical solution of the present invention is achieved in that way:

An exhaust device, comprising a pressure-bearing oil tank, the pressure-bearing oil tank is provided with an oil filling port, an oil outlet and an oil return port, the top of the pressure-bearing oil tank is provided with a gas collecting pipe, and a liquid level pipe is arranged in the gas collecting pipe Switch I, the top of the liquid level switch I is provided with an exhaust solenoid valve that discharges the gas in the gas collecting pipe, the liquid level switch I is connected to the controller, and the exhaust solenoid valve is controlled by the controller.

Further, the oil injection port is provided with an oil injection port cut-off valve, and the oil injection port stop valve is connected with the controller.

Further, the top wall of the pressurized oil tank is set upwardly from the end to the air collecting pipe.

Further, the top of the liquid level switch 1 is provided with an exhaust pipe communicating with the gas collecting pipe, and the exhaust solenoid valve is located on the exhaust pipe.

Further, a temperature sensor is provided at the oil outlet of the pressurized oil tank, and the temperature sensor is connected to a controller. A heater is also provided in the pressurized oil tank, and the heater is controlled by the controller.

Further, a liquid level switch II is provided in the pressurized oil tank, and the liquid level switch II is connected to the controller.

A motor oil cooling device, comprising the above-mentioned exhaust device, an oil pump, a flow meter, a motor, a heat exchanger and an overflow valve;

The oil pump, pressurized oil tank, flow meter, motor, and heat exchanger are connected in sequence to form an oil circuit;

The pressurized oil tank, overflow valve, and oil pump are connected in sequence to form a second oil circuit;

An oil supply stop valve is provided on the oil circuit between the flowmeter and the oil inlet of the motor, an oil return stop valve is provided between the oil discharge port of the motor and the heat exchanger, and the oil inlet of the heat exchanger There is an oil discharge valve, and the oil supply stop valve, oil return stop valve, overflow valve and oil discharge valve are all controlled by the controller.

Further, the heat exchanger is provided with a cold source by a compressor and a condenser, both of which are controlled by a controller.

Further, the oil outlet of the oil pump is connected to the oil return port of the pressure-bearing oil tank, the oil outlet of the pressure-bearing oil tank is connected to a flow meter, the flow meter is connected to the oil inlet of the motor, and the oil outlet of the motor The oil outlet is connected with the oil inlet of the heat exchanger, and the oil outlet of the heat exchanger is connected with the oil pump.

Compared with the prior art, the exhaust device and the motor oil cooling device of the present invention have the following advantages:

In the exhaust device of the present invention, due to the small diameter of the air collecting pipe itself and the small surface area of the oil, the volume of the discharged oil is relatively small when the oil level in the air collecting pipe drops; The air pipe is set upwards, because the flow rate of the oil in the pressurized oil tank is slow, a small amount of air brought into the pressurized oil tank can rise to the top slope of the pressurized oil tank under the action of buoyancy and then flow into the air collecting pipe along the slope;

Motor oil cooling device Because the oil area in the motor is much larger than the oil area in the air collecting pipe, the oil level change in the motor after the oil discharged from the air collecting pipe enters the motor is much smaller than the oil level in the air collecting pipe. The amount is almost negligible, so as to achieve precise control of the oil level in the motor.

Description of drawings

The drawings constituting a part of the present invention are used to provide a further understanding of the present invention, and the schematic embodiments and descriptions of the present invention are used to explain the present invention, and do not constitute an improper limitation of the present invention. In the attached picture:

FIG. 1 is a schematic structural view of an exhaust device according to an embodiment of the present invention;

Fig. 2 is the schematic diagram of the enlarged structure of A in Fig. 1;

Fig. 3 is a schematic structural diagram of the motor oil cooling device according to the embodiment of the present invention.

Explanation of reference signs:

1-Oil pump; 2-Heat exchanger; 3-Oil discharge valve; 4-Oil return stop valve; 5-Overflow valve; 6-Oil discharge port; 7-Motor; 8-Oil inlet port; 9-Flow meter; 10-oil supply stop valve; 11-temperature sensor; 12-oil injection port; 13-oil injection port stop valve; 14-pressure oil tank; 15-exhaust pipe; 16-exhaust solenoid valve; 17-liquid level switch I; 18-gas collecting pipe; 19-liquid level switch II; 20-heater; 21-condenser; 22-compressor; 23-oil level in gas collecting pipe; 24-oil level in motor.

detailed description

It should be noted that, in the case of no conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

In describing the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", " The orientations or positional relationships indicated by "vertical", "horizontal", "top", "bottom", "inner" and "outer" are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and Simplified descriptions, rather than indicating or implying that the device or element referred to must have a particular orientation, be constructed and operate in a particular orientation, and thus should not be construed as limiting the invention. In addition, the terms "first", "second", etc. are used for descriptive purposes only, and should not be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, a feature defined as "first", "second", etc. may expressly or implicitly include one or more of that feature. In the description of the present invention, unless otherwise specified, "plurality" means two or more.

In the description of the present invention, it should be noted that unless otherwise specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection. Connected, or integrally connected; it can be mechanically connected or electrically connected; it can be directly connected or indirectly connected through an intermediary, and it can be the internal communication of two components. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present invention based on specific situations.

The present invention will be described in detail below with reference to the accompanying drawings and examples.

An exhaust device, as shown in Figures 1 and 2, includes a pressure-bearing oil tank 14, which is provided with an oil filling port 12, an oil outlet and an oil return port, and the top of the pressure-bearing oil tank 14 is provided with an air collecting pipe 18 , the gas collecting pipe 18 is provided with a liquid level switch I17, above the liquid level switch I17 is provided an exhaust solenoid valve 16 for discharging the gas in the gas collecting pipe 18, the liquid level switch I17 is connected with the controller, and the exhaust solenoid valve 16 is controlled by the controller control. In this example, the controller is PLC.

The oil injection port 12 is provided with an oil injection port stop valve 13, and the oil injection port stop valve 13 is connected with the controller.

As shown in FIG. 1 , the top wall of the pressurized oil tank 14 is set upwardly from the end to the air collecting pipe 18 .

As shown in FIG. 2 , an exhaust pipe 15 communicating with the gas collecting pipe 18 is arranged above the liquid level switch I17 , and the exhaust solenoid valve 16 is located on the exhaust pipe 15 .

As shown in FIG. 1 , a temperature sensor 11 is provided at the oil outlet of the pressurized oil tank 14 , and the temperature sensor 11 is connected to the controller. A heater 20 is also provided in the pressurized oil tank 14 , and the heater 20 is controlled by the controller. In this example, the heater 20 is a heating rod.

As shown in FIG. 1 , a liquid level switch II19 is provided in the pressure-bearing oil tank 14, and the liquid level switch II19 is connected with the controller. In this example, the liquid level switch II19 is located above the heater 20 .

A motor oil cooling device, as shown in Figure 3, comprising the above-mentioned exhaust device, an oil pump 1, a flow meter 9, a motor 7, a heat exchanger 2 and an overflow valve 5;

Oil pump 1, pressurized oil tank 14, flow meter 9, motor 7, heat exchanger 2 are connected in sequence to form an oil circuit;

The pressurized oil tank 14, the overflow valve 5, and the oil pump 1 are connected in sequence to form a second oil circuit;

An oil supply stop valve 10 is provided on the oil circuit between the flow meter 9 and the oil inlet 8 of the motor 7, and an oil return stop valve 4 is provided between the oil outlet 6 of the motor 7 and the heat exchanger 2, and the heat exchanger 2 An oil discharge valve 3 is arranged at the oil inlet, and the oil supply stop valve 10, the oil return stop valve 4, the overflow valve 5, and the oil discharge valve 3 are all controlled by the controller.

The heat exchanger 2 is provided with a cooling source by a compressor 22 and a condenser 21, and both the compressor 22 and the condenser 21 are controlled by a controller.

The oil outlet of the oil pump 1 is connected with the oil return port of the pressure-bearing oil tank 14, the oil outlet of the pressure-bearing oil tank 14 is connected with the flow meter 9, the flow meter 9 is connected with the oil inlet 8 of the motor 7, and the oil discharge port of the motor 7 6 is connected with the oil inlet of heat exchanger 2, and the oil outlet of heat exchanger 2 is connected with oil pump 1.

Oiling process:

The first step is to close the oil discharge valve 3, open the oil filling port shut-off valve 13, and the oil supply port shut-off valve 10, add cooling oil from the oil filling port 12 until the flow meter 9 is full, then close the oil supply port shut-off valve 10, and continue to add cooling oil. Use oil to the oil filling port shut-off valve 13, open the oil return shut-off valve 4, continue to add the amount of cooling oil in the motor 7 and the oil supply and return pipe, and close the oil filling port shut-off valve 13.

The second step opens overflow valve 5, oil supply shut-off valve 10, oil return shut-off valve 4, then opens oil pump 1, and adjusts overflow valve 5 to flow meter 9 internal flow to meet motor 7 technical requirements.

Oil cooling equipment working process:

Since the oil flows into the heat exchanger 2 from the motor 7, and then pumped into the pressurized oil tank 14 from the oil pump 1, a small amount of air will be brought into the pressurized oil tank 14, and the gas will be affected by the buoyancy due to the slow flow of oil in the pressurized oil tank 14. It acts on the pressure-bearing oil tank and rises to the top slope of the pressure-bearing oil tank 14 and then flows into the air collecting pipe 18 along the slope. Since the pressurized oil tank 14 has only one outlet and is closed by the exhaust solenoid valve 16, the gas will accumulate in the gas collecting pipe 18, causing the oil level 23 in the gas collecting pipe to drop to trigger the closing of the liquid level switch I17, and the exhaust solenoid valve is controlled by the controller. 16 open. Since the oil is pumped into the pressurized oil tank 14 from the oil pump 1, the internal pressure of the pressurized oil tank 14 is higher than the atmospheric pressure, and the excess gas in the air collecting pipe will be discharged from the exhaust pipe 15 through the exhaust solenoid valve 16. When the gas discharges the oil level in the gas collecting pipe and rises, the switch of the liquid level switch I17 will be disconnected, the exhaust solenoid valve 16 will also be closed, and the gas will no longer be discharged.

If there is no gas collecting pipe 18 and attachments, the gas will accumulate in the pressurized oil tank and the oil in the space occupied by the gas will be discharged from the pressurized oil tank to the motor to cause the oil level 24 in the motor to change.

Due to the small diameter of the air collecting pipe 18 and the small oil surface area, the volume of oil discharged when the oil level 23 in the air collecting pipe drops is relatively small. Because the oil liquid area in the motor 7 is much larger than the oil liquid area in the air collecting pipe 18, after the oil liquid discharged from the air collecting pipe 18 enters the motor 7, the change of the oil level height in the motor is much smaller than the oil level height in the air collecting pipe 18 The amount of change is almost negligible, so as to achieve precise control of the oil level in the motor 7.

The temperature sensor 11 is set at the outlet of the pressurized oil tank 14, and the temperature value is sent to the controller. The controller sends a heating command. The heater 20 will work to heat the oil flowing through the pressurized oil tank 14. The controller sends a cooling signal to the compressor. 22, the condenser 21 will work to cool down the oil flowing through the heat exchanger 2. No matter how the relief valve 5 is adjusted, the oil pumped from the oil pump 1 will flow into the oil pump 1 from the heat exchanger 2, so all the oil pumped from the oil pump 1 will participate in cooling, and there is no need to add a separate refrigeration cycle to the pressurized tank 14 The oil inside cools down and improves refrigeration efficiency. All the oil flows through the heat exchanger 2 to cool down and then flows into the oil pump 1. The relatively cold oil will lower the temperature of the oil pump 1 and reduce the loss of the oil pump 1.

If the system leaks and the liquid level drops below the liquid level switch II19, the liquid level switch II19 will be closed and cut off all electrical circuits to ensure that the heater 20 and the oil pump 1 will not burn dry.

Open the drain valve 3 after use to empty the oil in the system.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included in the scope of the present invention. within the scope of protection.

Claims (9)

1. An exhaust device, characterized in that: comprising a pressure oil tank (14), the pressure oil tank (14) is provided with an oil filling port (12), an oil outlet and an oil return port, the pressure oil tank (14) The top is provided with an air collecting pipe (18), the liquid level switch I (17) is arranged in the described air collecting pipe (18), and the described air collecting pipe (18) is provided above the liquid level switch I (17). The exhaust electromagnetic valve (16) for internal gas discharge, the liquid level switch I (17) is connected with the controller, and the exhaust electromagnetic valve (16) is controlled by the controller. 2. The exhaust device according to claim 1, characterized in that: the oil injection port (12) is provided with an oil injection port cut-off valve (13), and the oil injection port stop valve (13) is connected with the controller. 3. The exhaust device according to claim 2, characterized in that: the top wall of the pressurized oil tank (14) is set upwardly from the end to the air collecting pipe (18). 4. The exhaust device according to claim 3, characterized in that: the liquid level switch I (17) is provided with an exhaust pipe (15) communicated with the gas collecting pipe (18), and the exhaust solenoid valve (16) is located on said exhaust pipe (15). 5. The exhaust device according to claim 4, characterized in that: a temperature sensor (11) is provided at the oil outlet of the pressure-bearing oil tank (14), and the temperature sensor (11) is connected to the controller, so that A heater (20) is also provided in the pressurized oil tank (14), and the heater (20) is controlled by a controller. 6. The exhaust device according to claim 5, characterized in that: the pressure oil tank (14) is provided with a liquid level switch II (19), and the liquid level switch II (19) is connected to the controller. 7. A motor oil cooling device, characterized in that it comprises the exhaust device described in any one of claims 2-6, an oil pump (1), a flow meter (9), a motor (7), a heat exchanger (2 ) and relief valve (5); The oil pump (1), pressurized oil tank (14), flowmeter (9), motor (7), and heat exchanger (2) are connected in sequence to form an oil circuit; The pressurized oil tank (14), overflow valve (5), and oil pump (1) are connected in sequence to form a second oil circuit; An oil supply cut-off valve (10) is provided on the oil path between the flowmeter (9) and the oil inlet (8) of the motor (7), and the oil outlet (6) of the motor (7) is connected to the heat exchange There is an oil return cut-off valve (4) between the heat exchangers (2), an oil discharge valve (3) is provided at the oil inlet of the heat exchanger (2), the oil supply cut-off valve (10), the oil return cut-off Valve (4), overflow valve (5), oil discharge valve (3) are all controlled by controller. 8. The motor oil cooling device according to claim 7, characterized in that: the heat exchanger (2) is provided with a cold source by a compressor (22) and a condenser (21), and the compressor (22) and Condenser (21) is all controlled by controller. 9. The motor oil cooling device according to claim 7, characterized in that: the oil outlet of the oil pump (1) is connected to the oil return port of the pressurized oil tank (14), and the oil outlet of the pressurized oil tank (14) The oil outlet is connected to the flow meter (9), the flow meter (9) is connected to the oil inlet (8) of the motor (7), and the oil discharge port (6) of the motor (7) is connected to the heat exchanger ( 2) is connected to the oil inlet, and the oil outlet of the heat exchanger (2) is connected to the oil pump (1).