Method and system for testing lubricating oil quantity ratio of stator and rotor of range extender motor

Abstract

The present application relates to the test method and system of the ratio of the lubricating oil of the stator and rotor of the range extender motor, comprising providing a range extender body, wherein the range extender body is internally provided with a stator and rotor lubricating oil pump and a stator lubricating oil channel, the stator and rotor lubricating oil pump is used to transport the total stator and rotor lubricating oil in the range extender body; providing an external stator spraying pipe tool and a lubricating oil external control device, wherein the size of the internal oil channel of the stator spraying pipe tool is set in reference to the size of the stator lubricating oil channel, the lubricating oil external control device is internally provided with a stator lubricating oil delivery pump, the lubricating oil external control device is connected with the stator spraying pipe tool, and the stator lubricating oil delivery pump is used to deliver the external stator lubricating oil to the internal oil channel of the stator spraying pipe tool; starting the range extender body, controlling the temperature of the stator lubricating oil at the inlet of the stator lubricating oil channel to the required temperature, and obtaining the total stator and rotor lubricating oil and the pressure of the stator lubricating oil at the inlet of the stator lubricating oil channel.

Description

Technical Field

[0001] This invention relates to the field of automotive technology, and more specifically to a test method and system for the ratio of stator to rotor lubricating oil in a range extender motor. Background Technology

[0002] Currently, various new energy vehicle manufacturers are vigorously developing range-extended vehicles. As an important component of range-extended vehicles, the range extender also faces issues of lubrication and reliability while charging the battery.

[0003] Taking a relatively simple single-motor range extender as an example, this single-motor range extender is designed with a lubrication oil circuit. This lubrication oil circuit uses an electronic oil pump or a mechanical pump to circulate lubricating oil to the rotor and stator for lubrication and cooling. There is an optimal flow ratio between the stator lubricating oil and the rotor lubricating oil. If the flow ratio is higher than the optimal design value, it may lead to poor cooling and lubrication of the rotor, resulting in increased rotor shaft friction and rotor wear. If the flow ratio is lower than the optimal design value, it may lead to poor cooling of the stator, resulting in prolonged overheating of the motor, demagnetization of the permanent magnets, and a decrease or even damage to the motor performance.

[0004] To ensure this optimal flow ratio, it is necessary to test whether the circulating oil volume ratio of the stator and rotor lubricating oil in the range extender motor is the optimal one during related development experiments. However, due to the extremely limited internal space of the range extender, it is currently impossible to test the circulating oil volume ratio of the motor stator and rotor lubricating oil; calculations can only be performed through simulation. Because the lubricating oil flow field inside the range extender is complex, the accuracy of the circulating oil volume ratio calculated based on simulation cannot be guaranteed.

[0005] Therefore, existing technologies still need improvement. Summary of the Invention

[0006] One objective of this invention is to provide a test method for the ratio of stator and rotor lubricating oil in a range extender motor, in order to solve the problem that the circulating oil ratio of motor stator and rotor lubricating oil calculated based on simulation cannot guarantee the accuracy of the results due to the complex flow field of lubricating oil inside the range extender; the second objective is to provide a test system for the ratio of stator and rotor lubricating oil in a range extender motor.

[0007] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0008] A method for testing the stator-rotor lubricating oil quantity ratio of a range extender motor includes providing a range extender body, wherein the range extender body has a built-in stator-rotor lubricating oil pump and a stator lubricating oil passage, the stator-rotor lubricating oil pump being used to deliver the total stator-rotor lubricating oil within the range extender body; providing an external stator spray pipe fixture and an external lubricating oil control device, wherein the dimensions of the oil passages inside the stator spray pipe fixture are set with reference to the dimensions of the stator lubricating oil passages, the external lubricating oil control device has a built-in stator lubricating oil delivery pump, the external lubricating oil control device being connected to the stator spray pipe fixture, and delivering external stator lubricating oil to the internal oil passages of the stator spray pipe fixture through the stator lubricating oil delivery pump; starting the range extender body to deliver the stator lubricating oil... The temperature of the stator lubricating oil at the inlet of the stator lubricating oil channel is controlled to the required temperature, and the total amount of stator and rotor lubricating oil and the pressure of the stator lubricating oil at the inlet of the stator lubricating oil channel are obtained. The external lubricating oil control device is started, and the temperature and pressure of the external stator lubricating oil at the inlet of the internal oil channel of the stator spray pipe tooling are set to be the same as the temperature and pressure of the stator lubricating oil at the inlet of the stator lubricating oil channel. The amount of external stator lubricating oil is obtained, wherein the amount of external stator lubricating oil is the same as the amount of stator lubricating oil in the stator lubricating oil channel. The difference between the total amount of stator and rotor lubricating oil and the amount of external stator lubricating oil is calculated to obtain the amount of rotor lubricating oil. The ratio of the amount of external stator lubricating oil to the amount of rotor lubricating oil is calculated to obtain the stator-rotor lubricating oil ratio.

[0009] According to the above technical means, by referring to the dimensions of the stator lubrication oil passage, a stator spray pipe fixture with the same internal oil passage dimensions as the stator lubrication oil passage is set outside the range extender body. An external stator lubrication oil is supplied to the stator spray pipe fixture via a stator lubrication oil delivery pump. When the temperature and pressure of the external stator lubrication oil at the inlet of the internal oil passage of the stator spray pipe fixture are set to be the same as the temperature and pressure of the stator lubrication oil at the inlet of the stator lubrication oil passage, the measured amount of external stator lubrication oil at the inlet of the internal oil passage of the stator spray pipe fixture is... This is equivalent to the amount of stator lubricating oil in the stator lubrication oil channel. Since the total amount of lubricating oil between the stator and rotor is equal to the sum of the amount of lubricating oil in the stator and the rotor, the amount of lubricating oil in the rotor can be calculated when the total amount of lubricating oil in the stator and rotor and the amount of lubricating oil in the stator are obtained. The ratio of the amount of lubricating oil in the stator to the amount of lubricating oil in the rotor can be obtained. In other words, the test method of this embodiment can accurately measure the ratio of the amount of lubricating oil in the stator and rotor in the range extender development test, which helps to improve the accuracy of the test development and is of great significance to the development of the range extender.

[0010] Furthermore, the step of activating the external lubricating oil control device, setting the temperature and pressure of the external stator lubricating oil at the inlet of the internal oil passage of the stator spray pipe tooling to be the same as the temperature and pressure of the stator lubricating oil at the inlet of the stator lubricating oil passage, and then obtaining the amount of external stator lubricating oil specifically includes: providing a first temperature sensor and a first pressure sensor, and setting both the first temperature sensor and the first pressure sensor at the inlet of the stator lubricating oil passage, wherein the first temperature sensor and the first pressure sensor are respectively used to detect the temperature and pressure of the stator lubricating oil at the inlet of the stator lubricating oil passage; obtaining the temperature and pressure of the stator lubricating oil at the inlet of the stator lubricating oil passage based on the first temperature sensor and the first pressure sensor; activating the external lubricating oil control device, adjusting the temperature and pressure of the external stator lubricating oil in the internal oil passage of the stator spray pipe tooling to be the same as the temperature and pressure of the stator lubricating oil in the stator lubricating oil passage, and obtaining the amount of external stator lubricating oil, wherein the external lubricating oil control device has a heating device and a pressure regulating device.

[0011] According to the above technical means, by setting a first temperature sensor and a first pressure sensor, the temperature and pressure of the stator lubricating oil at the inlet of the stator lubricating oil channel can be obtained. Since the external control device for lubricating oil has a heating device and a pressure regulating device, the external control device for lubricating oil can refer to the temperature and pressure of the stator lubricating oil in the stator lubricating oil channel and adjust the temperature and pressure of the external stator lubricating oil at the inlet of the internal oil channel of the stator spray pipe tooling to be the same as the temperature and pressure of the stator lubricating oil in the stator lubricating oil channel.

[0012] Furthermore, before the step of activating the external lubricating oil control device to adjust the temperature and pressure of the external stator lubricating oil in the internal oil passage of the stator spray pipe fixture to be the same as the temperature and pressure of the stator lubricating oil in the stator lubricating oil passage, and obtaining the amount of external stator lubricating oil, the testing method further includes: providing a second temperature sensor and a second pressure sensor, and setting both the second temperature sensor and the second pressure sensor at the inlet of the internal oil passage of the stator spray pipe fixture, wherein the second temperature sensor and the second pressure sensor are respectively used to detect the temperature and pressure of the external stator lubricating oil at the inlet of the internal oil passage of the stator spray pipe fixture; and obtaining the temperature and pressure of the external stator lubricating oil at the inlet of the internal oil passage of the stator spray pipe fixture based on the second temperature sensor and the second pressure sensor.

[0013] Based on the above technical means, by setting a second temperature sensor and a second pressure sensor at the inlet of the oil passage inside the stator spray pipe tooling, the temperature and pressure of the external stator lubricating oil in the oil passage inside the stator spray pipe tooling can be detected.

[0014] Furthermore, the step of starting the range extender body, controlling the temperature of the stator lubricating oil at the stator lubricating oil inlet to the required temperature, and obtaining the total amount of stator and rotor lubricating oil and the pressure of the stator lubricating oil at the stator lubricating oil inlet specifically includes: providing an oil cooler and connecting the oil cooler to the range extender body; providing a first flow meter and setting the first flow meter at the connection between the oil cooler and the range extender body; starting the range extender body, controlling the temperature of the stator lubricating oil at the stator lubricating oil inlet to the required temperature, and obtaining the pressure of the stator lubricating oil at the stator lubricating oil inlet and the total amount of stator and rotor lubricating oil through the first flow meter.

[0015] According to the above technical means, since the total amount of lubricating oil of all stator and rotor participating in the circulation in the range extender body needs to be heat exchanged through the oil cooler, the total amount of lubricating oil of stator and rotor can be obtained by setting a first flow meter at the connection between the oil cooler and the range extender body.

[0016] Furthermore, the step of activating the external control device for lubricating oil, setting the temperature and pressure of the external stator lubricating oil at the inlet of the internal oil passage of the stator spray pipe fixture to be the same as the temperature and pressure of the stator lubricating oil at the inlet of the stator lubricating oil passage, and then obtaining the amount of external stator lubricating oil specifically includes: providing a second flow meter and setting the second flow meter at the inlet of the stator spray pipe fixture; activating the external control device for lubricating oil, setting the temperature and pressure of the external stator lubricating oil at the inlet of the internal oil passage of the stator spray pipe fixture to be the same as the temperature and pressure of the stator lubricating oil at the inlet of the stator lubricating oil passage, and then obtaining the amount of external stator lubricating oil through the second flow meter.

[0017] Based on the above technical means, the amount of external stator lubricating oil can be obtained by installing a second flow meter at the inlet of the oil passage inside the stator spray pipe tooling.

[0018] A test system for the stator-rotor lubricating oil quantity ratio of a range extender motor is applied to the test method for the stator-rotor lubricating oil quantity ratio of a range extender motor as described above. The test system includes: a range extender body, which has a built-in stator-rotor lubricating oil pump and a stator lubricating oil channel. The stator-rotor lubricating oil pump is used to deliver the total stator-rotor lubricating oil in the range extender body; a stator spray pipe fixture, which is set outside the range extender body. The size of the oil channel inside the stator spray pipe fixture is set with reference to the size of the stator lubricating oil channel; and an external lubricating oil control device, which has a stator lubricating oil delivery pump. The external lubricating oil control device is set outside the range extender body and connected to the stator spray pipe fixture. The external lubricating oil control device delivers external stator lubricating oil to the internal oil channel of the stator spray pipe fixture through the stator lubricating oil delivery pump.

[0019] Based on the aforementioned technical means, a stator spray pipe fixture with the same internal oil passage size as the stator lubrication oil passage is installed outside the range extender body, referencing the size of the stator lubrication oil passage. An external stator lubrication oil is supplied to the stator spray pipe fixture via a stator lubrication oil delivery pump. When the temperature and pressure of the external stator lubrication oil at the inlet of the internal oil passage of the stator spray pipe fixture are set to be the same as the temperature and pressure of the stator lubrication oil at the inlet of the stator lubrication oil passage, the measured amount of external stator lubrication oil at the inlet of the internal oil passage of the stator spray pipe fixture 3 will be... The amount of stator lubricating oil in the stator lubrication oil passage 11 is such that the total amount of stator and rotor lubricating oil is equal to the sum of the stator lubricating oil and the rotor lubricating oil. Therefore, when the total amount of stator and rotor lubricating oil and the amount of stator lubricating oil are obtained, the amount of rotor lubricating oil can be calculated. The ratio of stator lubricating oil to rotor lubricating oil can be obtained. The test system of this embodiment has a simple structure and is easy to use. It can accurately measure the ratio of stator and rotor lubricating oil in the range extender development test, which helps to improve the accuracy of the test development and is of great significance to the development of the range extender.

[0020] Furthermore, the testing system also includes: a first temperature sensor, which is disposed at the inlet of the stator lubricating oil passage and is used to detect the temperature of the stator lubricating oil; a first pressure sensor, which is disposed at the inlet of the stator lubricating oil passage and is used to detect the pressure of the stator lubricating oil; the external lubricating oil control device has a built-in heating device and a pressure regulating device, and the external lubricating oil control device adjusts the temperature and pressure of the external stator lubricating oil at the inlet of the internal oil passage of the stator spray pipe tooling to be the same as the temperature and pressure of the stator lubricating oil at the inlet of the stator lubricating oil passage through the heating device and the pressure regulating device.

[0021] According to the above technical means, the external lubricating oil control device controls the temperature of the external stator lubricating oil to be the same as the temperature of the stator lubricating oil in the stator lubricating oil channel through a heating device. At the same time, the external lubricating oil control device adjusts the pressure of the external stator lubricating oil to be the same as the pressure of the stator lubricating oil in the stator lubricating oil channel, and records the amount of external stator lubricating oil at this time. Then, the external stator lubricating oil is pumped back to the external lubricating oil control device through the stator lubricating oil delivery pump, so that it can be continuously recycled.

[0022] Furthermore, the testing system also includes: a second temperature sensor, which is disposed at the inlet of the oil passage inside the stator spray pipe fixture and is used to detect the temperature of the external stator lubricating oil; and a second pressure sensor, which is disposed at the inlet of the oil passage inside the stator spray pipe fixture and is used to detect the pressure of the external stator lubricating oil.

[0023] Based on the above technical means, by setting a second temperature sensor and a second pressure sensor at the inlet of the internal oil passage of the external stator spray pipe tooling, the data detected by the second temperature sensor and the second pressure sensor are more accurate, thereby better assisting the external control equipment of lubricating oil to adjust the temperature and pressure of the external stator lubricating oil in the internal oil passage of the stator spray pipe tooling to be the same as the temperature and pressure of the stator lubricating oil in the stator lubricating oil passage through its heating device and pressure regulating device.

[0024] Furthermore, the testing system also includes: an oil cooler connected to the range extender body; a first flow meter located at the connection between the oil cooler and the range extender body, used to detect the total amount of lubricating oil in the stator and rotor; and a second flow meter located at the inlet of the oil passage inside the stator spray pipe fixture, used to detect the amount of lubricating oil in the external stator.

[0025] According to the above technical means, by setting a first flow meter at the connection between the oil cooler and the range extender body, the total amount of lubricating oil for the stator and rotor can be detected. By setting a second flow meter at the inlet of the oil passage inside the stator spray pipe tooling, the amount of lubricating oil for the external stator can be detected. Then, based on the difference between the total amount of lubricating oil for the stator and rotor and the amount of lubricating oil for the external stator, the amount of lubricating oil for the rotor can be obtained, and thus the ratio of the amount of lubricating oil for the stator and rotor can be obtained.

[0026] Furthermore, the testing system also includes: a data acquisition device connected to the first flow meter for acquiring analog signals, and testing software connected to the data acquisition device for processing analog signals.

[0027] In other words, by setting up data acquisition equipment and testing software, it can be used to collect and record data.

[0028] The beneficial effects of this application are as follows: This invention sets up a stator spray pipe fixture with internal oil passage dimensions identical to the stator lubrication oil passages on the outside of the range extender body, referencing the dimensions of the stator lubrication oil passages. An external stator lubrication oil is supplied to the stator spray pipe fixture via a stator lubrication oil delivery pump. When the temperature and pressure of the external stator lubrication oil at the inlet of the internal oil passage of the stator spray pipe fixture are set to be the same as the temperature and pressure of the stator lubrication oil at the inlet of the stator lubrication oil passage, the measured amount of external stator lubrication oil at the inlet of the internal oil passage of the stator spray pipe fixture... This is equivalent to the amount of stator lubricating oil in the stator lubrication oil channel. Since the total amount of lubricating oil between the stator and rotor is equal to the sum of the amount of lubricating oil in the stator and the rotor, the amount of lubricating oil in the rotor can be calculated when the total amount of lubricating oil in the stator and rotor and the amount of lubricating oil in the stator are obtained. The ratio of the amount of lubricating oil in the stator to the amount of lubricating oil in the rotor can be obtained. In other words, the test method of this embodiment can accurately measure the ratio of the amount of lubricating oil in the stator and rotor in the range extender development test, which helps to improve the accuracy of the test development and is of great significance to the development of the range extender. Attached Figure Description

[0029] Figure 1 This is an overall flowchart of the test method for the ratio of stator to rotor lubricating oil in the range extender motor of the present invention.

[0030] Figure 2 This is a schematic diagram of the structure of the range extender body in the test system for the ratio of stator to rotor lubricating oil in the range extender motor of the present invention.

[0031] Figure 3 This is a schematic diagram of the connection structure between the stator spray pipe fixture and the external control equipment for the lubricating oil quantity ratio test system of the range extender motor stator rotor in this invention.

[0032] Among them, 11-stator lubricating oil passage; 12-stator and rotor main lubricating oil return port; 13-stator and rotor main lubricating oil outlet; 2-stator and rotor lubricating oil pump; 21-oil inlet; 3-stator spray pipe fixture; 41-first pressure sensor; 42-second pressure sensor; 43-first flow meter; 5-lubricating oil external control equipment; 6-oil cooler; 7-data acquisition equipment; 8-testing software; 9-connection fixture. Detailed Implementation

[0033] The embodiments of the present invention will be described below with reference to the accompanying drawings and preferred embodiments. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be understood that the preferred embodiments are only for illustrating the present invention and not for limiting the scope of protection of the present invention.

[0034] It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of the present invention. The illustrations only show the components related to the present invention and are not drawn according to the actual number, shape and size of the components in the actual implementation. In the actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0035] See Figure 1 This embodiment proposes a test method for the ratio of circulating oil volume of stator and rotor lubricating oil in a range extender motor, including:

[0036] S10. A range extender body is provided, wherein the range extender body has a stator and rotor lubricating oil pump and a stator lubricating oil passage built in it, and the stator and rotor lubricating oil pump is used to transport the total stator and rotor lubricating oil in the range extender body.

[0037] S20. Provide an external stator spray pipe fixture and an external lubricating oil control device, wherein the size of the internal oil passage of the stator spray pipe fixture is set with reference to the size of the stator lubricating oil passage, the external lubricating oil control device has a built-in stator lubricating oil delivery pump, the external lubricating oil control device is connected to the stator spray pipe fixture, and delivers external stator lubricating oil to the internal oil passage of the stator spray pipe fixture through the stator lubricating oil delivery pump;

[0038] S30. Start the range extender body, control the temperature of the stator lubricating oil at the stator lubricating oil inlet to the required temperature, and obtain the total amount of lubricating oil in the stator and rotor and the pressure of the stator lubricating oil at the stator lubricating oil inlet.

[0039] S40. Start the external control device for lubricating oil, set the temperature and pressure of the external stator lubricating oil at the inlet of the internal oil passage of the stator spray pipe tool to be the same as the temperature and pressure of the stator lubricating oil at the inlet of the stator lubricating oil passage, and then obtain the amount of external stator lubricating oil, wherein the amount of external stator lubricating oil is the same as the amount of stator lubricating oil in the stator lubricating oil passage.

[0040] S50. Calculate the difference between the total amount of lubricating oil in the stator and rotor and the amount of lubricating oil in the external stator to obtain the amount of lubricating oil in the rotor;

[0041] S60. Calculate the ratio of the external stator lubricating oil quantity to the rotor lubricating oil quantity to obtain the stator-rotor lubricating oil quantity ratio.

[0042] Specifically, "external" refers to being located outside the range extender body. That is, both the stator spray pipe fixture and the external lubrication control device are located outside the range extender body and are not connected to or communicate with it. To test the ratio of stator lubricating oil volume in the stator lubrication channel to rotor lubricating oil volume in the rotor lubrication channel (i.e., the stator-rotor lubricating oil ratio), it is necessary to first know the total stator-rotor lubricating oil volume and the stator lubricating oil volume or the rotor lubricating oil volume. However, since the total stator-rotor lubricating oil necessarily passes through the range extender... The oil cooler is located inside the range extender body. Therefore, by setting a first flow meter at the connection between the oil cooler and the range extender body, the total amount of lubricating oil in the stator and rotor can be known. However, due to the narrow space inside the range extender body, it is impossible to accurately measure the amount of lubricating oil in the stator or rotor. Therefore, this embodiment sets an external stator spray pipe fixture and an external lubricating oil control device. By referring to the dimensions of the stator lubricating oil channel built into the original range extender body and some related parameters, the amount of stator lubricating oil in the stator lubricating oil channel is obtained, and then the ratio of stator to rotor lubricating oil is obtained.

[0043] That is, this embodiment proposes an external stator spray pipe fixture, wherein the external stator spray pipe fixture and the range extender body are respectively placed on the stator lubricating oil unit test bench and the range extender body (range extender assembly) bench, the stator lubricating oil unit test bench and the range extender body bench are placed separately and tested separately.

[0044] In this embodiment, the test was first conducted on the range extender body (range extender assembly) bench. Specifically, the range extender body was started first. At this time, the stator and rotor lubricating oil pump built into the range extender body worked and delivered the total lubricating oil of the stator and rotor to the stator lubricating oil passage and the rotor lubricating oil passage. The range extender assembly can control the stator lubricating oil in the stator lubricating oil passage to the required temperature, for example, control the temperature to 90°C. At this time, the total amount of stator and rotor lubricating oil and the pressure of the stator lubricating oil at the inlet of the stator lubricating oil passage were obtained. In other words, when the test was conducted on the range extender body bench, the total amount of stator and rotor lubricating oil and the temperature and pressure of the stator lubricating oil at the inlet of the stator lubricating oil passage could be obtained.

[0045] Then, tests were conducted on a stator lubricating oil unit test bench. The external stator spray pipe fixture and the external lubricating oil control device were installed on the stator lubricating oil unit test bench. The dimensions of the internal oil passages of the external stator spray pipe fixture were set with reference to the dimensions of the stator lubricating oil passages built into the range extender body. Specifically, the external lubricating oil control device was activated, and the temperature and pressure values ​​of the external stator lubricating oil at the inlet of the internal oil passage of the stator spray pipe fixture were set to be consistent with the temperature and pressure values ​​of the stator lubricating oil at the inlet of the stator lubricating oil passage. Then, within a certain frequency... The amount of external stator lubricating oil at this time is measured by the external lubricating oil control equipment, which is equivalent to the amount of stator lubricating oil in the stator lubricating oil channel. Under the condition that the temperature and pressure of the stator lubricating oil at the inlet of the stator lubricating oil channel are the same as the temperature and pressure of the external stator lubricating oil at the inlet of the external stator spray pipe tool, the difference between the total lubrication amount of the stator and rotor and the amount of external stator lubricating oil is obtained. Then, by calculating the ratio of the amount of external stator lubricating oil to the amount of rotor lubricating oil, the ratio of stator to rotor lubricating oil can be obtained.

[0046] In other words, this embodiment sets up a stator spray pipe fixture with the same internal oil passage size as the stator lubrication oil passage outside the range extender body, referencing the size of the stator lubrication oil passage. An external stator lubrication oil is supplied to the stator spray pipe fixture via a stator lubrication oil delivery pump. When the temperature and pressure of the external stator lubrication oil at the inlet of the internal oil passage of the stator spray pipe fixture are set to be the same as the temperature and pressure of the stator lubrication oil at the inlet of the stator lubrication oil passage, the measured amount of external stator lubrication oil at the inlet of the internal oil passage of the stator spray pipe fixture is... This is equivalent to the amount of stator lubricating oil in the stator lubrication oil channel. Since the total amount of lubricating oil between the stator and rotor is equal to the sum of the amount of lubricating oil in the stator and the rotor, the amount of lubricating oil in the rotor can be calculated when the total amount of lubricating oil in the stator and rotor and the amount of lubricating oil in the stator are obtained. The ratio of the amount of lubricating oil in the stator to the amount of lubricating oil in the rotor can be obtained. In other words, the test method of this embodiment can accurately measure the ratio of the amount of lubricating oil in the stator and rotor in the range extender development test, which helps to improve the accuracy of the test development and is of great significance to the development of the range extender.

[0047] See Figure 1 In this embodiment, the steps of starting the range extender body, controlling the temperature of the stator lubricating oil at the stator lubricating oil inlet to the required temperature, and obtaining the total amount of lubricating oil in the stator and rotor and the pressure of the stator lubricating oil at the stator lubricating oil inlet specifically include:

[0048] An oil cooler is provided, and the oil cooler is connected to the range extender body;

[0049] A first flow meter is provided and is disposed at the connection between the oil cooler and the range extender body;

[0050] Start the range extender body, control the temperature of the stator lubricating oil at the stator lubricating oil inlet to the required temperature, and obtain the pressure of the stator lubricating oil at the stator lubricating oil inlet and obtain the total amount of lubricating oil of the stator and rotor through the first flow meter.

[0051] Specifically, since all the total amount of lubricating oil in the stator and rotor that participates in the circulation within the range extender body needs to be heat-exchanged through the oil cooler, the total amount of lubricating oil in the stator and rotor can be obtained by setting a first flow meter at the connection between the oil cooler and the range extender body.

[0052] See Figure 1 In this embodiment, the step of activating the external lubricating oil control device, setting the temperature and pressure of the external stator lubricating oil at the inlet of the internal oil passage of the stator spray pipe tooling to be the same as the temperature and pressure of the stator lubricating oil at the inlet of the stator lubricating oil passage, and then obtaining the amount of external stator lubricating oil specifically includes:

[0053] A first temperature sensor and a first pressure sensor are provided, and both the first temperature sensor and the first pressure sensor are disposed at the inlet of the stator lubricating oil passage, wherein the first temperature sensor and the first pressure sensor are respectively used to detect the temperature and pressure of the stator lubricating oil at the inlet of the stator lubricating oil passage;

[0054] The temperature and pressure of the stator lubricating oil at the inlet of the stator lubricating oil passage are obtained based on the first temperature sensor and the first pressure sensor.

[0055] The external control device for lubricating oil is activated to adjust the temperature and pressure of the external stator lubricating oil in the internal oil passage of the stator spray pipe tool to be the same as the temperature and pressure of the stator lubricating oil in the stator lubricating oil passage, and to obtain the amount of external stator lubricating oil. The external control device for lubricating oil has a heating device and a pressure regulating device.

[0056] Specifically, in this embodiment, by setting a first temperature sensor and a first pressure sensor, the temperature and pressure of the stator lubricating oil at the inlet of the stator lubricating oil channel can be obtained. Since the external control device for lubricating oil has a heating device and a pressure regulating device, the external control device for lubricating oil can refer to the temperature and pressure of the stator lubricating oil in the stator lubricating oil channel and adjust the temperature and pressure of the external stator lubricating oil at the inlet of the internal oil channel of the stator spray pipe tool to be the same as the temperature and pressure of the stator lubricating oil in the stator lubricating oil channel.

[0057] In this embodiment, before the step of activating the external lubricating oil control device to adjust the temperature and pressure of the external stator lubricating oil in the internal oil passage of the stator spray pipe tool to be the same as the temperature and pressure of the stator lubricating oil in the stator lubricating oil passage, and obtaining the amount of external stator lubricating oil, the testing method further includes:

[0058] A second temperature sensor and a second pressure sensor are provided, and both the second temperature sensor and the second pressure sensor are disposed at the inlet of the stator spray pipe tooling. The second temperature sensor and the second pressure sensor are respectively used to detect the temperature and pressure of the external stator lubricating oil at the inlet of the stator spray pipe tooling.

[0059] The temperature and pressure of the external stator lubricating oil at the inlet of the internal oil passage of the stator spray pipe tooling are obtained using the second temperature sensor and the second pressure sensor.

[0060] Specifically, in this embodiment, a second temperature sensor and a second pressure sensor are installed at the inlet of the oil passage inside the stator spray pipe tooling, thereby detecting the temperature and pressure of the external stator lubricating oil in the oil passage inside the stator spray pipe tooling.

[0061] See Figure 1 In this embodiment, the step of activating the external lubricating oil control device, setting the temperature and pressure of the external stator lubricating oil at the inlet of the internal oil passage of the stator spray pipe tooling to be the same as the temperature and pressure of the stator lubricating oil at the inlet of the stator lubricating oil passage, and then obtaining the amount of external stator lubricating oil specifically includes:

[0062] A second flow meter is provided and is installed at the inlet of the stator spray pipe tooling.

[0063] Start the external control device for lubricating oil, and set the temperature and pressure of the external stator lubricating oil at the inlet of the internal oil passage of the stator spray pipe tool to be the same as the temperature and pressure of the stator lubricating oil at the inlet of the stator lubricating oil passage. Then, obtain the amount of external stator lubricating oil through the second flow meter.

[0064] Specifically, in this embodiment, the amount of external stator lubricating oil can be obtained by setting a second flow meter at the inlet of the oil passage inside the stator spray pipe tool.

[0065] See Figure 2 and Figure 3This embodiment also proposes a test system for the stator-rotor lubricating oil quantity ratio of a range extender motor, which is applied to the test method for the stator-rotor lubricating oil quantity ratio of a range extender motor as described above. The test system includes a range extender body 1, a stator spray pipe fixture 3, and an external lubricating oil control device 5. The range extender body has a built-in stator-rotor lubricating oil pump 2, a stator lubricating oil channel 11, a stator-rotor total lubricating oil return port 12, and a stator-rotor total lubricating oil outlet 13. The stator-rotor lubricating oil pump 2 is used to transport the stator-rotor total lubricating oil in the range extender body. The stator and rotor lubricating oil pump 2 has an oil inlet 21. The stator spray pipe fixture 3 is located outside the range extender body. The size of the stator spray pipe fixture 3 is set with reference to the size of the stator lubricating oil passage 11. The external lubricating oil control device 5 has a built-in stator lubricating oil delivery pump. The external lubricating oil control device 5 is located outside the range extender body and is connected to the stator spray pipe fixture 3. The external lubricating oil control device 5 delivers external stator lubricating oil to the stator spray pipe fixture 3 through the stator lubricating oil delivery pump.

[0066] In this embodiment, a stator spray pipe fixture with the same internal oil passage size as the stator lubrication oil passage is installed outside the range extender body, referencing the dimensions of the stator lubrication oil passage. An external stator lubrication oil is supplied to the stator spray pipe fixture via a stator lubrication oil delivery pump. When the temperature and pressure of the external stator lubrication oil at the inlet of the internal oil passage of the stator spray pipe fixture are set to be the same as the temperature and pressure of the stator lubrication oil at the inlet of the stator lubrication oil passage, the measured amount of external stator lubrication oil at the inlet of the internal oil passage of the stator spray pipe fixture 3 is equivalent to... The amount of stator lubricating oil on the stator lubrication oil passage 11 is such that the total amount of stator and rotor lubricating oil is equal to the sum of the stator lubricating oil and the rotor lubricating oil. Therefore, when the total amount of stator and rotor lubricating oil and the amount of stator lubricating oil are obtained, the amount of rotor lubricating oil can be calculated. The ratio of stator lubricating oil to rotor lubricating oil can be obtained. The test system of this embodiment has a simple structure and is easy to use. It can accurately measure the ratio of stator and rotor lubricating oil in the range extender development test, which helps to improve the accuracy of the test development and is of great significance to the development of the range extender.

[0067] See Figure 2 and Figure 3In this embodiment, the testing system further includes a first temperature sensor and a first pressure sensor 41. Both the first temperature sensor and the first pressure sensor 41 are located at the inlet of the stator lubricating oil channel. The first temperature sensor is used to detect the temperature of the stator lubricating oil at the inlet of the stator lubricating oil channel, and the first pressure sensor 41 is used to detect the pressure of the stator lubricating oil at the inlet of the stator lubricating oil channel. The external lubricating oil control device 5 is connected to the stator spray pipe fixture 3 via a high-pressure oil pipe. The external lubricating oil control device 5 has a heating device and a pressure regulating device. The external lubricating oil control device 5 controls the temperature of the external stator lubricating oil to be the same as the temperature of the stator lubricating oil in the stator lubricating oil channel 11 through the heating device. At the same time, the external lubricating oil control device 5 adjusts the pressure of the external stator lubricating oil to be the same as the pressure of the stator lubricating oil in the stator lubricating oil channel 11, and records the amount of external stator lubricating oil at this time. Then, the external stator lubricating oil is pumped back to the external lubricating oil control device 5 through the stator lubricating oil delivery pump, so that it can be continuously recycled.

[0068] See Figure 3 In this embodiment, the testing system further includes a second temperature sensor and a second pressure sensor 42. Both the second temperature sensor and the second pressure sensor 42 are located at the inlet of the oil passage inside the stator spray pipe fixture. The second temperature sensor and the second pressure sensor 42 are respectively connected to the data acquisition device 7 and are used to detect the temperature and pressure of the external stator lubricating oil in the oil passage inside the stator spray pipe fixture. By setting the second temperature sensor and the second pressure sensor 42 at the inlet of the oil passage inside the stator spray pipe fixture, the data detected by the second temperature sensor and the second pressure sensor 42 are more accurate, thereby better assisting the external lubricating oil control device 5 in adjusting the temperature and pressure of the external stator lubricating oil in the oil passage inside the stator spray pipe fixture 3 to be the same as the temperature and pressure of the stator lubricating oil in the stator lubricating oil passage 11 through its heating device and pressure regulating device.

[0069] See Figure 2In this embodiment, the testing system further includes an oil cooler 6, a first flow meter 43, and a second flow meter. The oil cooler 6 is connected to the range extender body. The first flow meter 43 is located at the connection between the oil cooler 6 and the range extender body. The second flow meter is located at the inlet of the oil passage inside the stator spray pipe fixture. Since the total lubricating oil of the stator and rotor circulating in the range extender body needs to undergo heat exchange through the oil cooler 6, the first flow meter 43 is set at the connection between the oil cooler 6 and the range extender body in this embodiment, which can detect the total amount of lubricating oil of the stator and rotor. By setting the second flow meter at the inlet of the oil passage inside the stator spray pipe fixture, the amount of external stator lubricating oil can be detected. Then, the amount of rotor lubricating oil is obtained based on the difference between the total amount of lubricating oil of the stator and rotor and the amount of external stator lubricating oil, and thus the ratio of stator to rotor lubricating oil is obtained.

[0070] For easier installation of the first flow meter 43, please refer to... Figure 1 In this embodiment, the testing system further includes a connecting fixture 9, which is disposed between the range extender body and the oil cooler 6. One end of the connecting fixture 9 is fixed to the range extender body by a thread, and the other end is fixed to the oil cooler 6 by a thread. The first flow meter 43 is disposed on the oil inlet end of the connecting fixture 9. In order to prevent the total lubricating oil of the stator and rotor from leaking at the connection between the connecting fixture 9 and the range extender body, and at the connection between the connecting fixture 9 and the oil cooler 6, a first sealing ring is provided at the connection between the connecting fixture 9 and the range extender body, and a second sealing ring is provided at the connection between the connecting fixture 9 and the range extender body. The middle part of the connecting fixture 9 is made of stainless steel pipe, and the stainless steel pipe is welded to both ends of the connecting fixture 9.

[0071] See Figure 2 In one embodiment, the first flow meter 43 and the second flow meter can be gear flow meters or ultrasonic flow meters. In this embodiment, since gear flow meters have a certain flow resistance and have a certain impact on the actual flow rate, ultrasonic flow meters are preferred in this embodiment.

[0072] See Figure 2 and Figure 3 In this embodiment, the testing system further includes a data acquisition device 7 and testing software 8. The data acquisition device 7 is connected to a first temperature sensor, a second temperature sensor, a first pressure sensor 41, a second pressure sensor 42, a first flow meter 43, and a second flow meter via data transmission lines. The testing software 8 is connected to the data acquisition device 7 via data transmission lines. This embodiment uses the data acquisition device 7 and testing software 8 to collect and record data.

[0073] The above embodiments are merely preferred embodiments provided to fully illustrate the present invention, and the scope of protection of the present invention is not limited thereto. Equivalent substitutions or modifications made by those skilled in the art based on the present invention are all within the scope of protection of the present invention.

Claims

1. A test method for the ratio of stator to rotor lubricating oil in a range extender motor, characterized in that, include: A range extender body is provided, wherein the range extender body has a built-in stator and rotor lubricating oil pump and a stator lubricating oil passage, and the stator and rotor lubricating oil pump is used to deliver the total stator and rotor lubricating oil in the range extender body; An external stator spray pipe fixture and an external lubricating oil control device are provided. The dimensions of the internal oil passages of the stator spray pipe fixture are set with reference to the dimensions of the stator lubricating oil passages. The external lubricating oil control device has a built-in stator lubricating oil delivery pump. The external lubricating oil control device is connected to the stator spray pipe fixture and delivers external stator lubricating oil to the internal oil passages of the stator spray pipe fixture through the stator lubricating oil delivery pump. Start the range extender body, control the temperature of the stator lubricating oil at the stator lubricating oil inlet to the required temperature, and obtain the total amount of lubricating oil in the stator and rotor and the pressure of the stator lubricating oil at the stator lubricating oil inlet. Start the external control device for lubricating oil, set the temperature and pressure of the external stator lubricating oil at the inlet of the internal oil passage of the stator spray pipe tool to be the same as the temperature and pressure of the stator lubricating oil at the inlet of the stator lubricating oil passage, and then obtain the amount of external stator lubricating oil, wherein the amount of external stator lubricating oil is the same as the amount of stator lubricating oil in the stator lubricating oil passage. The rotor lubricating oil quantity is obtained by calculating the difference between the total lubricating oil quantity of the stator and rotor and the lubricating oil quantity of the external stator. Calculate the ratio of the external stator lubricating oil quantity to the rotor lubricating oil quantity to obtain the stator-rotor lubricating oil quantity ratio.

2. The test method for the ratio of stator to rotor lubricating oil in a range extender motor according to claim 1, characterized in that, The step of starting the external control device for lubricating oil, setting the temperature and pressure of the external stator lubricating oil at the inlet of the internal oil passage of the stator spray pipe tooling to be the same as the temperature and pressure of the stator lubricating oil at the inlet of the stator lubricating oil passage, and then obtaining the amount of external stator lubricating oil specifically includes: A first temperature sensor and a first pressure sensor are provided, and both the first temperature sensor and the first pressure sensor are disposed at the inlet of the stator lubricating oil passage, wherein the first temperature sensor and the first pressure sensor are respectively used to detect the temperature and pressure of the stator lubricating oil at the inlet of the stator lubricating oil passage; The temperature and pressure of the stator lubricating oil at the inlet of the stator lubricating oil passage are obtained based on the first temperature sensor and the first pressure sensor. The external control device for lubricating oil is activated to adjust the temperature and pressure of the external stator lubricating oil in the internal oil passage of the stator spray pipe tool to be the same as the temperature and pressure of the stator lubricating oil in the stator lubricating oil passage, and to obtain the amount of external stator lubricating oil. The external control device for lubricating oil has a heating device and a pressure regulating device.

3. The test method for the ratio of stator to rotor lubricating oil in a range extender motor according to claim 2, characterized in that, Before the step of activating the external lubricating oil control device, adjusting the temperature and pressure of the external stator lubricating oil in the internal oil passage of the stator spray pipe tool to be the same as the temperature and pressure of the stator lubricating oil in the stator lubricating oil passage, and obtaining the amount of external stator lubricating oil, the test method further includes: A second temperature sensor and a second pressure sensor are provided, and both the second temperature sensor and the second pressure sensor are disposed at the inlet of the oil passage inside the stator spray pipe tooling. The second temperature sensor and the second pressure sensor are respectively used to detect the temperature and pressure of the external stator lubricating oil at the inlet of the oil passage inside the stator spray pipe tooling. The temperature and pressure of the external stator lubricating oil at the inlet of the internal oil passage of the stator spray pipe tooling are obtained using the second temperature sensor and the second pressure sensor.

4. The test method for the ratio of stator to rotor lubricating oil in a range extender motor according to claim 1, characterized in that, The steps of starting the range extender body, controlling the temperature of the stator lubricating oil at the stator lubricating oil inlet to the required temperature, and obtaining the total amount of lubricating oil in the stator and rotor and the pressure of the stator lubricating oil at the stator lubricating oil inlet specifically include: An oil cooler is provided, and the oil cooler is connected to the range extender body; A first flow meter is provided and is disposed at the connection between the oil cooler and the range extender body; Start the range extender body, control the temperature of the stator lubricating oil at the stator lubricating oil inlet to the required temperature, and obtain the pressure of the stator lubricating oil at the stator lubricating oil inlet and obtain the total amount of lubricating oil of the stator and rotor through the first flow meter.

5. The test method for the ratio of stator to rotor lubricating oil in a range extender motor according to claim 1, characterized in that, The step of starting the external control device for lubricating oil, setting the temperature and pressure of the external stator lubricating oil at the inlet of the internal oil passage of the stator spray pipe tooling to be the same as the temperature and pressure of the stator lubricating oil at the inlet of the stator lubricating oil passage, and then obtaining the amount of external stator lubricating oil further includes: A second flow meter is provided and is installed at the inlet of the stator spray pipe tooling; Start the external control device for lubricating oil, and set the temperature and pressure of the external stator lubricating oil at the inlet of the internal oil passage of the stator spray pipe tool to be the same as the temperature and pressure of the stator lubricating oil at the inlet of the stator lubricating oil passage. Then, obtain the amount of external stator lubricating oil through the second flow meter.

6. A test system for the ratio of stator to rotor lubricating oil in a range extender motor, characterized in that, It is applied to the test method for the ratio of stator to rotor lubricating oil in a range extender motor as described in any one of claims 1-5, wherein the test system comprises: The range extender body has a built-in stator and rotor lubricating oil pump and a stator lubricating oil channel. The stator and rotor lubricating oil pump is used to transport the total lubricating oil of the stator and rotor in the range extender body. A stator spray pipe fixture is installed outside the range extender body, and the dimensions of the oil passages inside the stator spray pipe fixture are set with reference to the dimensions of the stator lubrication oil passages. An external control device for lubricating oil is provided, which includes a stator lubricating oil delivery pump. The external control device is located outside the range extender body and is connected to the stator spray pipe fixture. The external control device delivers external stator lubricating oil to the internal oil passage of the stator spray pipe fixture through the stator lubricating oil delivery pump.

7. The test system for the ratio of stator to rotor lubricating oil in a range extender motor according to claim 6, characterized in that, The testing system also includes: A first temperature sensor is disposed at the inlet of the stator lubricating oil passage and is used to detect the temperature of the stator lubricating oil; A first pressure sensor is located at the inlet of the stator lubricating oil passage and is used to detect the pressure of the stator lubricating oil. The external control device for lubricating oil has a built-in heating device and a pressure regulating device. The external control device for lubricating oil adjusts the temperature and pressure of the external stator lubricating oil at the inlet of the internal oil passage of the stator spray pipe tool to be the same as the temperature and pressure of the stator lubricating oil at the inlet of the stator lubricating oil passage.

8. The test system for the ratio of stator to rotor lubricating oil in a range extender motor according to claim 7, characterized in that, The testing system also includes: The second temperature sensor is located at the inlet of the oil passage inside the stator spray pipe tooling and is used to detect the temperature of the external stator lubricating oil. The second pressure sensor is located at the inlet of the oil passage inside the stator spray pipe fixture and is used to detect the pressure of the external stator lubricating oil.

9. The test system for the ratio of stator to rotor lubricating oil in a range extender motor according to claim 6, characterized in that, The testing system also includes: An oil cooler, which is connected to the range extender body; The first flow meter is located at the connection between the oil cooler and the range extender body, and is used to detect the total amount of lubricating oil in the stator and rotor. The second flow meter is installed at the inlet of the oil passage inside the stator spray pipe fixture and is used to detect the amount of external stator lubricating oil.

10. The test system for the ratio of stator to rotor lubricating oil in a range extender motor according to claim 9, characterized in that, The testing system also includes: A data acquisition device, which is connected to the first flow meter, is used to acquire analog signals; The testing software is connected to the data acquisition device and is used to process analog signals.

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