Testing device for oil nozzle of gear pair

Abstract

The utility model relates to the technical field of lubricating oil nozzle screening equipment, and discloses a test device for a gear pair oil nozzle, which comprises a support frame, a hollow pipeline is arranged in the support frame, two ends of the support frame are respectively connected with an oil pump joint and a test mechanism, the test mechanism comprises a plurality of test joints, and the test joints are used for connecting oil nozzles. Each test connector is provided with a transverse calibration unit used for calibrating the width of the oil injection face of the oil injection nozzle, and the oil injection nozzle is located in the transverse calibration unit. A longitudinal calibration unit is arranged at the bottom of the supporting frame and is parallel to the test connector, and the distance between the longitudinal calibration unit and a nozzle of the oil nozzle is equal to the distance between the nozzle of the oil nozzle and the meshing line of the gear pair. In practical application, the performance test accuracy and precision of the oil nozzle are improved, meanwhile, the screening efficiency is improved, and it is ensured that an oil injection face completely covers the meshing area of a single gear pair.

Description

Technical Field

[0001] The utility model relates to the technical field of lubricating injector screening equipment, and particularly relates to a test device for a gear pair injector. Background Art

[0002] With the development of modern industry, high-precision gear transmission devices are widely used, and at the same time, the requirements for the service life and reliability of gear transmission devices are getting higher and higher. The lubrication quality of the gear pair is one of the necessary conditions for the reliable operation of high-precision gear transmission devices. Insufficient or uneven lubrication of the gear pair will affect the quality and service life of gear transmission. At present, the gear pair adopts forced oil injection lubrication, and the injector is a key part of oil injection lubrication. For large gear devices, the traditional evaluation method is to check whether the oil injection quality of the injector meets the oil injection requirements through the inspection hole cover after the gear transmission device is assembled. If the oil injection requirements are not met, the injector will be disassembled and readjusted. This not only has a large amount of adjustment work, but also the gear device is repeatedly assembled and disassembled, and there is a risk of parts bumping.

[0003] In this regard, a Chinese utility model patent, named a device for testing the lubrication characteristics of an injector for a power branch gear transmission, with the publication number CN208264273U and the publication date of July 16, 2018, specifically discloses testing the total oil injection amount of the injector and the coverage angle of the fan-shaped oil injection surface ejected before the injector is assembled and used to judge the lubrication effect of the injector.

[0004] Although the above-mentioned utility model patent tests the total oil injection amount of the injector and the coverage angle of the fan-shaped oil injection surface ejected, which belongs to the test of the injector characteristics and screens the injector to a certain extent. However, affected by the distance between the injector and the tooth surface and the number of injectors, it is impossible to determine whether the fan-shaped oil injection surfaces formed by multiple injectors completely cover the meshing width of the gear pair only by the coverage angle of a single fan-shaped oil injection surface, and at the same time, it is also impossible to truly simulate the actual effect when multiple injectors operate in combination. It cannot achieve the purpose of screening and optimizing the combination of injectors, and affects the service life of gear transmission. Summary of the Utility Model

[0005] The utility model aims to provide a test device for a gear pair injector to improve the accuracy and precision of the performance test of the injector and ensure that the oil injection surface completely covers the meshing area of a single gear pair.

[0006] To achieve the above object, the utility model adopts the following technical solution: A test device for a gear pair fuel injector, comprising a support frame, the inside of the support frame is a hollow pipe, both ends of the support frame are respectively connected with an oil pump joint and a test mechanism, the test mechanism includes a plurality of interconnected test joints, the test joints are used to connect the fuel injector, each test joint is provided with a transverse calibration unit for calibrating the width of the fuel injection surface of the fuel injector, the fuel injector is located inside the transverse calibration unit; a longitudinal calibration unit is provided at the bottom of the support frame, the longitudinal calibration unit is parallel to the test joint, and the distance between the longitudinal calibration unit and the nozzle of the fuel injector is equal to the distance from the nozzle of the fuel injector to the meshing line of the gear pair.

[0007] The principle and advantages of this solution are as follows:

[0008] 1. In practical application, in this solution, specific screening criteria are designed for the fuel injector through the transverse calibration unit and the longitudinal calibration unit. When the widest part of the fuel injection fan-shaped surface of the fuel injector reaches the longitudinal calibration unit and exceeds both sides of the transverse calibration unit, it means that the fuel injector is qualified; compared with the utility model patent solution in the background technology for measuring the fan angle, the calibration width of the transverse calibration unit in this solution is equal to the center distance between adjacent fuel injectors, indicating that this device can ensure accurate simulation of the relative position and coverage range of the fuel injector in the actual gear pair during evaluation, solving the problem that the fuel injection surface cannot be guaranteed to completely cover the meshing width only by the fuel injection angle, improving the accuracy and precision of the fuel injector performance test, and ensuring complete lubrication during the actual operation of the gear pair; and this solution truly simulates the actual effect during the combined operation of multiple fuel injectors, achieving the purpose of fuel injector screening and optimal combination.

[0009] 2. The test mechanism includes a plurality of interconnected test joints, and the test joints are used to connect the fuel injector, enabling multiple fuel injector tests to be carried out in a single batch, improving the test and screening efficiency, and greatly reducing the test time and labor cost.

[0010] 3. The overall structure of this test device is simple, the manufacturing cost is low, the detection and maintenance are convenient, effectively reducing the equipment cost of the enterprise.

[0011] Furthermore, a regulating unit for adjusting the distance between the longitudinal calibration unit and the support frame is provided between the longitudinal calibration unit and the support frame. The regulating unit includes a support sleeve and a regulating bracket. The regulating bracket slides inside the support sleeve. Fixing holes are provided on the support sleeve, and fastening screws for pressing the regulating bracket are installed in the fixing holes.

[0012] The above solution also has the following effects:

[0013] 1. The distances from the fuel injectors corresponding to different gear pairs to the gear meshing line are different. The test device of this solution realizes simulating the working positions of the fuel injectors corresponding to different gear pairs by setting an adjustment unit between the longitudinal calibration unit and the support frame, enabling the fuel injectors of different gear pairs in the same gear transmission device to complete performance tests on the same test device, improving the flexibility and versatility of the test device. The test device of this solution adopts a simple structure to cope with diverse gear pair designs, greatly enhancing the practical value of the device.

[0014] 2. The adjustment bracket slides and adjusts within the support sleeve and is fixed by a fastening screw to achieve the adjustment of the longitudinal calibration unit. For the fuel injectors of different gear pairs, the overall structure is simple, and the adjustment operation can be quickly completed, improving work efficiency; for the fuel injectors of the same gear pair, after the preliminary adjustment and fixation, the repeated tests of the fuel injectors can be carried out, improving the test efficiency and ensuring the consistency of the screening quality.

[0015] Furthermore, the two ends of the test joint are respectively an internal thread joint and an external thread interface, and the internal thread interface and the external thread interface are connected between adjacent test joints.

[0016] The above setting makes the connection between adjacent test joints convenient and fast. During the actual test process, the test device can be quickly adjusted according to the number and situation of fuel injectors to be detected, realizing the synchronous test of multiple fuel injectors, and greatly improving work efficiency.

[0017] Furthermore, the transverse calibration unit includes two calibration lines, and the symmetry axis of the two calibration lines coincides with the midline of the fuel injector.

[0018] The above setting enables the calibration area of the transverse calibration unit to completely simulate the situation where the fuel injection width continuously covers the tooth surface of the gear pair. It can be quickly judged by observing whether the widest part of the fuel injection fan exceeds the calibration lines on both sides. Secondly, it can also ensure that the fuel injection quality of the selected fuel injectors is highly consistent, and can ensure good lubrication conditions for the gear transmission device.

[0019] Furthermore, the longitudinal calibration unit is composed of multiple calibration rods, and the multiple calibration rods are detachably connected.

[0020] The above setting can determine the overall length of the longitudinal calibration unit according to the number of fuel injectors to be detected in a single batch actually, enhancing the test flexibility of the device.

[0021] Furthermore, a connector is provided between the test joint and the fuel injector, and the connector is detachably connected to both the test joint and the fuel injector.

[0022] The above settings enable the performance testing of fuel injectors of different specifications and models by replacing the connector, without the need to equip too many types of test devices, greatly improving the versatility and economy of the test device and reducing the costs of enterprises.

[0023] Furthermore, the calibration line is a fine cotton thread. The fine cotton thread is a common material, which is cheap and easy to obtain, and has a small loss cost.

[0024] Furthermore, a throttle valve and a pressure gauge are provided on the support frame. The flow rate and pressure of the lubricating oil in the hollow pipeline of the support frame are adjusted through the throttle valve and the pressure gauge to simulate different working conditions for testing the fuel injector, and the working conditions can also be adjusted according to the model specifications of the fuel injector for performance testing, enhancing the practicability and versatility of the device. Description of the Drawings

[0025] Figure 1 It is a schematic structural diagram of an embodiment of the present utility model.

[0026] Figure 2 It is a schematic diagram of the fuel injection requirements of the fuel injector. Detailed Description of the Embodiment

[0027] The following is a further detailed description through specific embodiments:

[0028] The reference numerals in the accompanying drawings of the specification include: support frame 1, oil pump connector 2, test mechanism 3, test connector 4, fuel injector 5, horizontal calibration unit 6, fine cotton thread 61, vertical calibration unit 7, calibration rod 71, adjustment unit 8, support sleeve 81, adjustment bracket 82, fastening screw 83, throttle valve 9, pressure gauge 10.

[0029] The embodiment is basically as shown in the attached Figure 1As shown: A test device for a fuel injector of a gear pair, including a support frame 1. The inside of the support frame 1 is a hollow pipe. The two ends of the support frame 1 are respectively connected with an oil pump joint 2 and a test mechanism 3. The test device is connected with an oil pump through the oil pump joint 2. The test mechanism 3 includes a number of interconnected test joints 4. The test joints 4 are used to connect the fuel injectors 5. Preferably, there is a connecting head (not shown in the figure) between the test joint 4 and the fuel injector 5. The connecting head is a commonly used nozzle joint in the prior art and will not be elaborated here. The connecting head is detachably connected to both the test joint 4 and the fuel injector 5, such as by screw connection. In this way, it is convenient to perform performance tests on fuel injectors 5 of different specifications and models by replacing the connecting head, without the need to equip too many types of test devices, greatly improving the versatility and economy of the test device. The test joints 4 are connected to both sides of the lower end of the support frame 1. The two ends of the test joint 4 are respectively an internal thread joint and an external thread interface. The internal thread interface and the external thread interface are connected between adjacent two test joints 4. During the actual test process, the test device can be quickly adjusted according to the detection quantity and situation of the fuel injectors 5 to achieve synchronous tests of multiple fuel injectors 5.

[0030] Each test joint 4 is provided with a transverse calibration unit 6 for calibrating the injection surface width of the fuel injector 5. The fuel injector 5 is located inside the transverse calibration unit 6. The transverse calibration unit 6 includes two calibration lines. The calibration width of the transverse calibration unit 6 is equal to the center distance between adjacent two fuel injectors 5 within the same gear pair, and the symmetry axis of the two calibration lines coincides with the midline of the fuel injector 5. Preferably, the calibration line is selected as a fine cotton thread 61. The fine cotton thread 61 is a common material, cheap and easy to obtain, and has a small loss cost.

[0031] The calibration width of the transverse calibration unit 6 being equal to the center distance between adjacent two fuel injectors 5 within the same gear pair indicates that this device can ensure accurately simulating the relative position and coverage range of the fuel injector 5 in the actual gear pair during evaluation, solves the problem that only relying on the injection angle cannot ensure that the injection surface completely covers the tooth surface width, improves the accuracy and precision of the performance test of the fuel injector 5, and ensures complete lubrication during the actual operation of the gear pair.

[0032] The bottom of the support frame 1 is provided with a longitudinal calibration unit 7. The longitudinal calibration unit 7 is arranged parallel to the test joint 4. The distance between the longitudinal calibration unit 7 and the nozzle of the fuel injector 5 is equal to the distance from the nozzle of the fuel injector 5 to the meshing line of the gear pair, that is, the longitudinal calibration unit 7 is located on the meshing line of the gear pair. The longitudinal calibration unit 7 is composed of multiple calibration rods 71. The multiple calibration rods 71 are detachably connected to each other, such as by screw connection, snap connection, etc.; there is an adjustment unit 8 between the longitudinal calibration unit and the support frame 1 for adjusting the distance between the two. The adjustment unit 8 includes a support sleeve 81 and an adjustment bracket 82. The bottom end of the adjustment bracket 82 is symmetrically connected with the calibration rod 71. The adjustment bracket 82 slides inside the support sleeve 81. The support sleeve 81 is provided with fixing holes, and fastening screws 83 for pressing the adjustment bracket 82 are installed in the fixing holes.

[0033] An adjusting unit 8 is arranged between the longitudinal calibration unit 7 and the support frame 1 to realize simulating the working positions of the fuel injectors 5 corresponding to different gear pairs, so that the fuel injectors 5 of different gear pairs in the same gear transmission device can complete performance tests on the same test device, improving the flexibility and versatility of the test device.

[0034] A throttle valve 9 and a pressure gauge 10 are arranged on the support frame 1, and the flow rate and pressure of the lubricating oil in the hollow pipe of the support frame 1 are adjusted through the throttle valve 9 and the pressure gauge 10 to simulate different working conditions for testing the fuel injector 5, and the working conditions can also be adjusted according to the model specifications of the fuel injector 5 for performance testing.

[0035] The specific implementation process is as follows:

[0036] As Figure 2 shown is a schematic diagram of the fuel injection requirements of the fuel injector 5, where the widest part of the fuel injection fan-shaped surface coincides with the meshing line of the gear pair.

[0037] During the specific test, operate according to the following steps:

[0038] Step 1. Preliminary preparation

[0039] Before the test of the fuel injector 5, connect the test device to the lubricating oil pump, and then check the distances from each gear pair to their respective fuel injectors 5 according to the structure drawing of the gear transmission device, denoted as b; the center distance between two adjacent fuel injectors 5, denoted as a, and the number of fuel injectors 5; as Figure 1 shown, denote the distance between the two thin cotton threads 61 as A, and the distance from the nozzle of the fuel injector 5 to the calibration rod 71 as B.

[0040] Step 2. Installation and adjustment of the test device

[0041] According to the data in Step 1, first, according to the number of fuel injectors 5, connect the test joints 4 to the support frame 1, and try to install the test joints 4 symmetrically on the support frame 1. After the connection is completed, both ends of the last of the test joints 4 are blocked with screw plugs, and then the fuel injector 5 to be tested is fixed on the test joint 4. Adjust the longitudinal calibration unit 7 according to the data b in Step 1 so that B = b. After adjustment, fasten the adjustment bracket 82 with the fastening screw 83 to complete the position adjustment of the longitudinal calibration unit 7. Then, according to the number of fuel injectors 5, connect an appropriate number of calibration rods 71. Then, calibrate the fuel injection fan-shaped boundary with the thin cotton thread 61 to ensure that the boundary distance A = a, and the midline of the dimension A coincides with the midline of the fuel injector 5, that is, the boundary A is on both sides of the midline of the fuel injector 5.

[0042] Step 3. Test pressure adjustment

[0043] According to the pressure requirements during the actual use of the fuel injector 5, adjust the flow valve 9 and observe the reading of the pressure gauge 10. After reaching the operating pressure of the fuel injector 5, prepare for the test.

[0044] Step Four: Test Screening

[0045] After the above steps are completed, prepare for the test. Turn on the lubricating oil pump and observe whether the widest part of the fan-shaped spray formed by each fuel injector 5 reaches the calibration rod 71 and whether the width exceeds the boundaries of the two thin cotton threads 61. If the widest part of the fan-shaped spray formed by the fuel injector 5 reaches the calibration rod 71 and the width exceeds the boundaries of the two thin cotton threads 61, then the fuel injector 5 is qualified and meets the usage requirements; otherwise, it is unqualified.

[0046] With the above settings, specific screening criteria are designed for the fuel injector 5 through the horizontal calibration unit 6 and the vertical calibration unit 7. When the widest part of the fan-shaped spray surface of the fuel injector 5 reaches the vertical calibration unit 7 and exceeds both sides of the horizontal calibration unit 6, it indicates that the fuel injector 5 is qualified. Not only can the test results be directly observed, but also the fuel injectors 5 with high spray quality consistency can be screened out, ensuring good lubrication conditions for the gear transmission device.

[0047] The above are only embodiments of the present invention. Specific technical solutions and / or common knowledge such as characteristics well known in the art are not described in detail herein. It should be noted that for those skilled in the art, without departing from the technical solution of the present invention, several deformations and improvements can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the implementation effect of the present invention and the practicality of the patent. The protection scope required by this application shall be subject to the content of its claims, and the specific implementation manners described in the specification can be used to interpret the content of the claims.

Claims

1. A test device for a fuel injector of a gear pair, characterized in that: It includes a support frame. The inside of the support frame is a hollow pipe. The two ends of the support frame are respectively connected with an oil pump joint and a test mechanism. The test mechanism includes several interconnected test joints. The test joints are used to connect fuel injectors. Each test joint is provided with a transverse calibration unit for calibrating the width of the fuel injection surface of the fuel injector. The fuel injector is located within the transverse calibration unit. The bottom of the support frame is provided with a longitudinal calibration unit. The longitudinal calibration unit is parallel to the test joint. The distance between the longitudinal calibration unit and the nozzle of the fuel injector is equal to the distance from the nozzle of the fuel injector to the meshing line of the gear pair.

2. The test device for a gear pair fuel injector according to claim 1, characterized in that: There is an adjustment unit between the longitudinal calibration unit and the support frame for adjusting the distance between the two. The adjustment unit includes a support sleeve and an adjustment bracket. The adjustment bracket slides within the support sleeve. The support sleeve is provided with fixing holes, and fastening screws for pressing the adjustment bracket are installed in the fixing holes.

3. The test device for a gear pair fuel injector according to claim 2, characterized in that: The two ends of the test joint are respectively an internal thread joint and an external thread interface. The internal thread interface and the external thread interface of adjacent two test joints are connected to each other.

4. The test device for a gear pair fuel injector according to claim 3, characterized in that: The transverse calibration unit includes two calibration lines. The symmetry axis of the two calibration lines coincides with the midline of the fuel injector.

5. The test device for a gear pair fuel injector according to claim 4, characterized in that: The longitudinal calibration unit is composed of multiple calibration rods. The multiple calibration rods are detachably connected to each other.

6. The test device for a gear pair fuel injector according to claim 5, characterized in that: There is a connector between the test joint and the fuel injector. The connector is detachably connected to both the test joint and the fuel injector.

7. The test device for a gear pair fuel injector according to claim 6, characterized in that: The calibration line is a fine cotton thread.

8. The test device for a gear pair fuel injector according to claim 7, characterized in that: The support frame is provided with a throttle valve and a pressure gauge.

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