CN110949647B

CN110949647B - Cooling water path structure of marine electric propulsion device

Info

Publication number: CN110949647B
Application number: CN201911047463.2A
Authority: CN
Inventors: 李强; 张波; 文立辉; 窦晓峰
Original assignee: Wuhan Institute of Marine Electric Propulsion China Shipbuilding Industry Corp No 712 Institute CSIC
Current assignee: Wuhan Institute of Marine Electric Propulsion China Shipbuilding Industry Corp No 712 Institute CSIC
Priority date: 2019-10-30
Filing date: 2019-10-30
Publication date: 2020-12-08
Anticipated expiration: 2039-10-30
Also published as: CN110949647A

Abstract

The invention discloses a cooling waterway structure of a marine electric propulsion device, wherein a first valve is arranged on a waterway inlet pipeline of a variable frequency control device, a third valve is arranged on a waterway outlet pipeline of the variable frequency control device, a second valve is arranged on a waterway inlet pipeline of a propulsion motor, a fourth valve is arranged on a waterway outlet pipeline of the propulsion motor, a small water pump is connected between a waterway inlet pipeline of the variable frequency control device and a waterway inlet pipeline of the propulsion motor, and a fifth valve is connected between the waterway outlet pipeline of the variable frequency control device and the waterway outlet pipeline of the propulsion motor; under the condition that the external water supply device fails, the corresponding valves are opened and closed, the small water pump is operated to enable cooling water in the equipment to circulate between the two pieces of equipment, and the equipment can be continuously operated at low power on the premise of not increasing other heat dissipation equipment by means of heat dissipation of the water pipeline and the surface of the propulsion motor, so that the operation reliability of the equipment is improved.

Description

Cooling water path structure of marine electric propulsion device

Technical Field

The invention belongs to a ship transmission device, and particularly relates to a cooling water path topological structure of a ship electric propulsion device.

Background

Conventional marine power plants based on diesel engines and steam turbines have made a significant contribution to the development of ships and shipping, however, such power plants have been hampered by their inherent drawbacks, such as: the space occupied by the ship is too large, and the engine room space of the ship taking the diesel engine and the steam turbine as main machines is occupied by the engine, the mechanical transmission device, the speed reducer, the shafting and the like which are large in size, so that the space utilization rate of the engine room is greatly reduced, and the effective load is reduced; the working environment is poor, and in the engine room with a diesel engine or a steam turbine as a main machine, the vibration is large, the noise is high, oil stains are more, the air quality is influenced by the exhaust emission, and the sanitary condition is poor; the host is large and high, the system is complex, the maintenance difficulty is increased, and the maintenance workload is increased. Phase (C)

Compared with the prior art, after the ship adopts the electric propulsion system, the propulsion motor and the prime mover are in flexible connection through the cable, the length of the shafting is greatly shortened, the shafting design is simplified, the shafting arrangement is more flexible, the cabin layout is optimized, the propulsion vibration and the noise are smaller, the ship sails more concealably, the propulsion efficiency is high, and the operation is simple.

The electric propulsion device is more and more widely applied to various ships, generally, the electric propulsion device for the ships consists of a propulsion motor and a variable frequency control device, and in order to realize high power density of the device and reduce the volume and weight of the device, a water cooling mode is generally adopted, namely heat generated in the operation process of the device is taken away by cooling water; the water supply mode is that cooling water is respectively provided for the propulsion motor and the variable frequency control equipment, when the water supply device fails, the cooling water cannot be provided for the propulsion motor and the variable frequency control equipment, the heat dissipation surface of the propulsion motor is large, and the propulsion motor can still run at low power, but the heat capacity of a power unit of the variable frequency control equipment is small, the heat dissipation surface area is small, and heat generated by high-power or low-power running needs to be taken away through the cooling water, so that the variable frequency control equipment cannot work normally directly without the cooling water, and further the ship loses power.

Disclosure of Invention

The invention provides a cooling water path topological structure of a marine electric propulsion device, which aims to solve the problem that the existing marine electric propulsion device cannot continuously operate due to the fault of a water supply device.

In order to achieve the purpose, the technical scheme adopted by the invention for solving the technical problem is as follows: the utility model provides a marine electric propulsion device's cooling waterway structure, the advancing device based on advancing motor and variable frequency control equipment constitute, advancing motor is frame, end cover interior water cooling mode of leading to, variable frequency control equipment is the water cooling mode, install first valve on variable frequency control equipment's the water route import pipeline, install the third valve on variable frequency control equipment's the water route outlet pipeline, install the second valve on advancing motor's the water route import pipeline, install the fourth valve on advancing motor's the water route outlet pipeline, be connected with the small water pump between variable frequency control equipment water route import pipeline and the advancing motor water route import pipeline, be connected with the fifth valve between variable frequency control equipment water route outlet pipeline and the advancing motor water route outlet pipeline.

The cooling water path structure of the marine electric propulsion device is characterized in that two ends of a fifth valve are respectively connected to the front of a third valve and the front of a fourth valve, and the fifth valve is used for being closed when the first valve, the second valve, the third valve and the fourth valve are opened and being opened when the first valve, the second valve, the third valve and the fourth valve are closed.

The cooling water path structure of the marine electric propulsion device is characterized in that two ends of a fifth valve are respectively connected to the rear of the third valve and the rear of the fourth valve, and the fifth valve is used for being closed when the first valve, the second valve, the third valve and the fourth valve are opened and being opened when the first valve and the second valve are closed.

The cooling water path structure of the marine electric propulsion device is characterized in that two ends of a small water pump are respectively connected behind a first valve and a second valve and used for being closed when the first valve, the second valve, a third valve and a fourth valve are opened and being opened when the first valve, the second valve, the third valve and the fourth valve are closed.

The invention has the beneficial effects that: the cooling water path can close the valves at the water inlet and the water outlet of the two devices, open the valve between the water path water outlet of the two devices and operate the small water pump between the water path inlets of the two devices under the condition that the external water supply devices of the propulsion motor and the variable frequency control device have faults, so that the water in the two devices circulates between the variable frequency control device and the propulsion motor, the heat generated by the internal power part of the variable frequency control device is brought out by the internal circulating water, the propulsion motor and the variable frequency control device can continuously operate at low power by means of the surface heat dissipation of the water path pipeline and the propulsion motor on the premise of not increasing other heat dissipation devices, the operation reliability of the electric propulsion device is improved, and the cooling water path is particularly suitable for the electric propulsion device with an integrated structure for the propulsion motor and.

Drawings

FIG. 1 is a schematic view illustrating a flow direction of cooling water when an external water supply apparatus according to the present invention normally supplies water;

fig. 2 is a schematic view illustrating the flow of cooling water when the external water supply apparatus of the present invention is out of order.

The figures are numbered: v1-first valve, V2-second valve, V3-third valve, V4-fourth valve, V5-fifth valve.

Detailed Description

The invention is further illustrated below with reference to the figures and examples.

As shown in fig. 1, the marine electric propulsion device of the present invention is composed of a propulsion motor and a variable frequency control device, wherein the propulsion motor is a base and an end cover which are cooled by water, a second valve V2 is installed on a waterway inlet pipeline, and a fourth valve V4 is installed on a waterway outlet pipeline. The variable frequency control equipment is in a water cooling mode, a first valve V1 is installed on a waterway inlet pipeline of the variable frequency control equipment, and a third valve V3 is installed on a waterway outlet pipeline of the variable frequency control equipment.

The propulsion motor and the variable frequency control equipment are connected in parallel on a water path, a small water pump is arranged between water path inlets of the two equipment, and a fifth valve V5 is arranged between water path outlets of the two equipment.

When the external water supply device supplies water normally, the valves V1, V2, V3 and V4 are opened, the valve V5 is closed, the small water pump does not operate, and the cooling water flows as shown in figure 1. The heat generated by the propulsion motor and the variable frequency control equipment is taken away by the cooling water; when the external water supply device has a fault, the valves V1, V2, V3 and V4 are closed, the valve V5 is opened, the small water pump runs, so that water in the two devices circulates between the variable frequency control device and the propulsion motor, the cooling water moves towards the direction shown in figure 2, heat generated by the internal power component of the variable frequency control device is brought out by the internal circulating water, and the propulsion motor and the variable frequency control device can continue to run at a small power on the premise of not increasing other heat dissipation devices by means of the surface heat dissipation of the waterway pipeline and the propulsion motor.

The above-described embodiments are merely illustrative of the principles and effects of the present invention, and some embodiments may be applied, and it will be apparent to those skilled in the art that various changes and modifications may be made without departing from the inventive concept of the present invention, and these embodiments are within the scope of the present invention.

Claims

1. The utility model provides a marine electric propulsion device's cooling waterway structure, is based on the advancing device that advancing motor and variable frequency control equipment constitute, advancing motor is frame, end cover interior water cooling mode of leading to, variable frequency control equipment is water cooling mode, its characterized in that: a first valve (V1) is installed on a waterway inlet pipeline of the variable frequency control equipment, a third valve (V3) is installed on a waterway outlet pipeline of the variable frequency control equipment, a second valve (V2) is installed on a waterway inlet pipeline of the propulsion motor, a fourth valve (V4) is installed on the waterway outlet pipeline of the propulsion motor, a small water pump is connected between a waterway inlet pipeline of the variable frequency control equipment and a waterway inlet pipeline of the propulsion motor, two ends of the small water pump are respectively connected behind the first valve (V1) and the second valve (V2) and used for being opened when the first valve (V1), the second valve (V2), the third valve (V3) and the fourth valve (V4) are opened and being closed when the first valve (V1), the second valve (V2), the third valve (V3) and the fourth valve (V4) are closed, and a fifth valve (V5) is connected between the waterway outlet pipeline of the variable frequency control equipment and the waterway outlet pipeline of the propulsion motor, the two ends of the fifth valve (V5) are respectively connected in front of the third valve (V3) and the fourth valve (V4) and are used for being closed when the first valve (V1), the second valve (V2), the third valve (V3) and the fourth valve (V4) are opened and being opened when the first valve (V1), the second valve (V2), the third valve (V3) and the fourth valve (V4) are closed.