Cooling lubricating oil flow detection device for gearbox clutch

Abstract

The utility model discloses a gearbox clutch cooling lubricating oil flow detection device which comprises a variable pump, an oil temperature control box, an oil duct interface device, a multi-channel flow sensor, a data recorder oil tank and a simulation clutch. The oil duct interface device is connected with a lubricating oil inlet of the simulated clutch shaft; one end of the oil duct interface device, the oil tank, the variable pump and the oil temperature control box form a flow input pipeline; the other end of the oil duct interface device, the multi-channel flow sensor and the oil tank form a flow output pipeline; the oil duct interface device is used for transmitting and converting lubricating oil in the simulation clutch to the multi-channel flow sensor; and the data recorder is in communication connection with the variable pump, the oil temperature control box and the multi-channel flow sensor. According to the utility model, lubrication data of clutches of different gears are visually displayed, and data support is provided for design analysis of a clutch lubrication oil duct.

Description

Technical Field

[0001] This utility model relates to the field of forklift gearbox clutch technology, specifically a gearbox clutch cooling lubricating oil flow detection device. Background Technology

[0002] As a key component of the transmission system, the clutch in a hydraulic forklift gearbox requires a separate lubrication channel to force lubrication of each component during transmission in order to improve its lifespan. Due to the different number of clutch components, the design and arrangement of the lubrication channels, the required lubrication flow rate for each clutch is also different. If the lubrication flow rate is too low, the lifespan of the clutch components will be reduced; if the lubrication flow rate is too high, energy loss will increase and efficiency will decrease during transmission.

[0003] Compared to other splash lubrication types of transmissions, hydraulic forklift gearboxes employ an independent clutch design for each gear to transmit higher torque during operation. Each independent clutch requires forced lubrication, making it essential to test and study the required lubrication flow rate for each clutch. To determine whether the required lubrication amount for each clutch meets design requirements, the lubrication flow rate data for each clutch during actual operation of the gearbox is measured. This test data is crucial for the performance and reliability design of the product.

[0004] In the prior art, the invention patent with patent publication number CN109343447A discloses a control system and method for a power shift test bench for a tracked vehicle transmission mechanism. The purpose of the lubrication circuit of the test bench in this patent is to control the lubrication flow through various sensors, shut-off valves, and proportional throttle valves, and the lubrication flow is a known target value. Utility Model Content

[0005] The technical problem to be solved by this utility model is to meet the needs for lubrication flow-related technical data in the development of gearboxes.

[0006] To solve the above-mentioned technical problems, this utility model provides the following technical solution:

[0007] A transmission clutch cooling lubricating oil flow detection device includes: a variable pump 10, an oil temperature control box 20, an oil passage interface device 30, a multi-channel flow sensor 40, a data logger 50, an oil tank 60, and a simulated clutch 70.

[0008] The oil passage interface device 30 is connected to the lubricating oil inlet of the simulated clutch 70 shaft;

[0009] One end of the oil passage interface device 30 forms a flow input pipeline with the oil tank 60, the variable pump 10, and the oil temperature control box 20;

[0010] The other end of the oil passage interface device 30, together with the multi-channel flow sensor 40 and the oil tank 60, forms a flow output pipeline;

[0011] The oil passage interface device 30 is used to transmit and convert the lubricating oil in the simulated clutch 70 to the multi-channel flow sensor 40;

[0012] The data logger 50 is communicatively connected to the variable pump 10, the oil temperature control box 20, and the multi-channel flow sensor 40.

[0013] In one embodiment of the present invention, the oil passage interface device 30 is located between the simulated clutch 70 and the simulated clutch fixed housing 71.

[0014] In one embodiment of this utility model, the number of oil passage interface devices 30 is the same as the number of input oil passages of the simulated clutch 70.

[0015] In one embodiment of this utility model, multiple oil passage interface devices 30 are connected to a multi-channel flow sensor 40.

[0016] In one embodiment of this utility model, during use, the installation position of the simulated clutch 70 and the simulated clutch fixed housing 71, as well as the design dimensions of the oil passage and oil cavity, are consistent with the fixed housing and clutch used in the actual gearbox.

[0017] Compared with the prior art, the beneficial effects of this utility model are:

[0018] By employing a variable displacement pump with adjustable flow input and an oil temperature control box to regulate oil temperature, the lubrication flow required under different operating conditions of the transmission is accurately simulated, resulting in more comprehensive test data. The simulated clutch adopts a structural design consistent with actual transmission products, significantly reducing errors between the testing process and actual use. Furthermore, this testing device utilizes a multi-channel flow sensor and a data logger for real-time data monitoring and archiving, allowing for comparative analysis of test data under different operating conditions. This comprehensive data provides data support for the design of the product's lubrication channels. Based on the oil distribution data obtained from the tests, adaptive adjustments can be made to the existing oil channel design, greatly extending the service life of the clutch and transmission and improving product reliability.

[0019] This invention compares the actual measured lubrication flow rate with the required lubrication flow rate in the clutch, thereby adjusting the structural design to achieve the target value of lubrication flow rate.

[0020] This invention enables multi-dimensional measurement and comprehensive data detection by simulating different engine speeds and different lubricating oil temperatures within the transmission. Furthermore, it employs a multi-channel flow sensor module and a data logger for real-time data monitoring. This allows for data comparison of different clutch lubrication conditions under the same operating conditions, as well as comparison of detection data for the same clutch under different operating conditions. The testing process eliminates the influence of other factors, intuitively displaying the lubrication data of clutches in different gears, and providing data support for the design and analysis of clutch lubrication channels. Attached Figure Description

[0021] Figure 1 This is a block diagram of a gearbox clutch cooling lubricating oil flow detection device according to an embodiment of the present invention.

[0022] Figure 2 This is a schematic diagram of a gearbox clutch cooling lubricating oil flow detection device according to an embodiment of the present invention. Detailed Implementation

[0023] To facilitate understanding of the technical solution of this utility model by those skilled in the art, the technical solution of this utility model will now be further described in conjunction with the accompanying drawings.

[0024] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0025] Please see Figure 1 and Figure 2 As shown, this utility model provides a transmission clutch cooling lubricating oil flow detection device, including: a variable displacement pump 10, an oil temperature control box 20, an oil passage interface device 30, a multi-channel flow sensor 40, a data logger 50, and an oil tank 60. The oil passage interface device 30 is connected to the input oil passage of the simulated clutch 70. One end of the oil passage interface device 30, together with the oil tank 60, the variable displacement pump 10, and the oil temperature control box 20, forms a flow input pipeline. The other end of the oil passage interface device 30, together with the multi-channel flow sensor 40 and the oil tank 60, forms a flow output pipeline. The oil passage interface device 30 is used to transmit and convert the lubricating oil in the simulated clutch 70 to the multi-channel flow sensor 40. The data logger 50 is communicatively connected to the variable displacement pump 10, the oil temperature control box 20, and the multi-channel flow sensor 40.

[0026] In this embodiment, the oil passage interface device 30 is located between the simulated clutch 70 and the simulated clutch fixed housing 71. Furthermore, the number of oil passage interface devices 30 is the same as the number of input oil passages of the simulated clutch 70, and all oil passage interface devices 30 are connected to the multi-channel flow sensor 40. Additionally, the oil passage interface device 30 is a design fixture to meet the requirements of different lubrication oil passage sizes.

[0027] In this embodiment, the variable pump 10 is used to simulate the input flow rate of the lubricating oil required by the gearbox. The input flow rate is consistent with the total flow rate used for cooling and lubrication under different operating conditions. The lubricating oil is transferred to the lubricating oil inlet of the simulated clutch 70 shaft through the simulated clutch fixed housing 71. The lubricating oil is then transferred to the multi-channel flow sensor 40 through the oil passage interface device 30 on the simulated clutch 70 to measure the proportion of lubricating oil flow allocated to different simulated clutches 70. Finally, the detection data of the multi-channel flow sensor 40 is transmitted to the data recorder 50.

[0028] In this embodiment, the multi-channel flow sensor 40 can simultaneously collect multiple sets of flow data and transmit the data to the data logger 50 for data processing. The final result is the percentage of lubrication flow of each clutch to the total input flow.

[0029] In this embodiment, when in use, the installation position and oil passage / oil chamber design dimensions of the simulated clutch 70 and the simulated clutch fixed housing 71 should be consistent with those of the fixed housing and clutch used in the actual gearbox.

[0030] In this embodiment, the variable pump 10 can adjust the input flow rate Q, the oil temperature control box 20 can adjust the temperature of the input lubricating oil, the simulated clutch mounting housing 71 serves as the test sample, and its structure is consistent with that of the product under test. The simulated clutch 70 also serves as the test sample, and its structure is consistent with that of the product under test. The oil passage hole in the simulated clutch mounting housing 71 is connected to the oil passage hole in the simulated clutch 70 for the transmission of lubricating oil. The oil passage interface device 30 serves as a detection device, used for the transmission and conversion of lubricating oil from the simulated clutch 70 to the multi-channel flow sensor 40. The multi-channel flow sensor 40 serves as a detection device, detecting the lubrication flow rate of the simulated clutch 70. The data logger 50 records all reference data from the multi-channel flow sensor 40, and a sufficiently large oil tank 60 is used to store the oil required for testing and the oil returned after testing.

[0031] In this embodiment, during use, all connections of the detection devices and oil pipes should be completely sealed, with no leakage or loosening during the detection process. The data signal acquisition wiring harness should have a certain level of protection to prevent signal and data loss during the detection process. The detection process is as follows:

[0032] Place the simulated clutch 70 and the simulated clutch housing 71 according to the vehicle installation position, install the connecting oil pipes at each location, and check that there is no looseness or leakage at each oil pipe connection.

[0033] Add a certain amount of lubricating oil to the oil tank 60. The amount of lubricating oil is sufficient to meet the maximum flow rate required for the output test of the variable pump 10.

[0034] Set the output flow rate Q1 of the variable pump 10 and the temperature T1 of the oil temperature control box 20 under operating condition 1 according to the testing requirements.

[0035] Start variable pump 10.

[0036] After observing the data collected on the data logger 50, once the output flow rate Q1 of the variable pump 10 and the temperature T1 of the lubricating oil tend to stabilize, the flow data Qa, Qb, Qc, ... of each simulated clutch 70 recorded on the data logger 50 are archived for subsequent data analysis.

[0037] Turn off variable pump 10.

[0038] After completing the data detection for operating condition 1, repeat the above operation according to the preset requirements for operating conditions 2, 3, ... until the data detection for all operating conditions in the detection requirements has been completed, then the detection part is complete.

[0039] The test data is analyzed, and the actual test data needs to be compared with the initial design target. If the actual test data of each simulated clutch 70 is basically consistent with the design target flow rate, it can be concluded that the product's lubrication oil passage design is reliable and meets the usage requirements. If there is a deviation between the actual lubrication flow rate of each simulated clutch 70 and the design target flow rate, the oil passage structure of the simulated clutch 70 should be redesigned in a directional manner according to the direction of the deviation. After the design is completed, the test sample should be retested until the test data meets the design requirements.

[0040] In this embodiment, specific examples are given for illustration:

[0041] The specific implementation example uses a forklift gearbox for 5-ton vehicles. The gearbox uses four parallel clutch assemblies for gear shifting. The total lubrication flow required by the gearbox during operation is provided by its own power pump, which provides different lubrication flows at different speeds. In this testing device, a variable displacement pump 10 is used to simulate the lubrication flow Q under different operating conditions of the gearbox. When the lubrication flow Q1 = 10 L / min, the corresponding power pump speed n = 800 rpm; when the lubrication flow Q2 = 20 L / min, the corresponding power pump speed n = 1200 rpm; when the lubrication flow Q3 = 30 L / min, the corresponding power pump speed n = 1600 rpm; when the lubrication flow Q4 = 40 L / min, the corresponding power pump speed n = 2000 rpm; when the lubrication flow Q5 = 50 L / min, the corresponding power pump speed n = 2400 rpm; and when the lubrication flow Q6 = 60 L / min, the corresponding power pump speed n = 2800 rpm.

[0042] In this embodiment, the target values ​​for the proportion of lubrication flow on the four sets of simulated clutches 70 are defined based on the usage time of each gear in the gearbox product. This embodiment is a forklift gearbox with two forward and two reverse gears. Based on the special working conditions of the forklift, the usage time of forward and reverse is the same. The target values ​​for the lubrication flow of the four sets of simulated clutches 70 are defined as Qa = (25% ± 1%)Q, Qb = (25% ± 1%)Q, Qc = (25% ± 1%)Q, and Qd = (25% ± 1%)Q.

[0043] In this embodiment, the test data obtained for each simulated clutch 70 should be the average value under various temperature conditions. Based on the final test results, if the test results meet the target value requirements, the reliability of the product's lubrication passage design is verified. If the test results deviate from the target value, according to the basic principles of fluid mechanics, the flow rate Q is proportional to the square of the orifice diameter D, Q = K x D. 2 The coefficient Kx of the test result is calculated, and the target value Ky is adjusted according to the deviation between the test result and the test target. After adjustment, the product is tested again to verify the reliability of the lubrication channel design.

[0044] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this invention, and no reference numerals in the claims should be construed as limiting the scope of the claims.

[0045] The above-described embodiments are merely examples of implementation methods of the utility model. The scope of protection of this utility model is not limited to the above-described embodiments. For those skilled in the art, several modifications and improvements can be made without departing from the concept of this utility model, and these all fall within the scope of protection of this utility model.

Claims

1. A device for detecting the flow rate of cooling lubricating oil in a gearbox clutch, characterized in that, include: Variable pump (10), oil temperature control box (20), oil passage interface device (30), multi-channel flow sensor (40), data logger (50), oil tank (60) and simulated clutch (70); The oil passage interface device (30) is connected to the lubricating oil inlet of the simulated clutch (70) shaft; One end of the oil passage interface device (30) forms a flow input pipeline with the oil tank (60), the variable pump (10), and the oil temperature control box (20); The other end of the oil passage interface device (30) forms a flow output pipeline with the multi-channel flow sensor (40) and the oil tank (60); The oil passage interface device (30) is used to transmit and convert the lubricating oil in the simulated clutch (70) to the multi-channel flow sensor (40); The data logger (50) is communicatively connected to the variable pump (10), the oil temperature control box (20), and the multi-channel flow sensor (40).

2. The gearbox clutch cooling lubricating oil flow detection device according to claim 1, characterized in that, The oil passage interface device (30) is located between the simulated clutch (70) and the simulated clutch fixed housing (71).

3. The gearbox clutch cooling lubricating oil flow detection device according to claim 1, characterized in that, The number of oil passage interface devices (30) is the same as the number of input oil passages of the simulated clutch (70).

4. The gearbox clutch cooling lubricating oil flow detection device according to claim 2, characterized in that, Multiple oil passage interface devices (30) are connected to a multi-channel flow sensor (40).

5. The gearbox clutch cooling lubricating oil flow detection device according to claim 2, characterized in that, When in use, the installation position of the simulated clutch (70) and the simulated clutch fixed housing (71) and the design dimensions of the oil passage and oil cavity are consistent with those of the fixed housing and clutch used in the actual gearbox.

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