Vibration-damped control console for diesel locomotives

Abstract

The present invention discloses a vibration-damping control console for a diesel locomotive, comprising: a control console body; and a plurality of vibration isolators connected between the locomotive's body frame and the control console body, with the plurality of vibration isolators positioned proximate to the transverse plane containing the center of gravity of the control console body. The present invention can reduce control console vibration and improve the driving environment for the driver.

Description

Technical Field

[0001] The present invention relates to the technical field of locomotives, and in particular to a vibration-damping control console for diesel locomotives. Background Art

[0002] The structural stability of the control panel is crucial to the driver's comfort. The diesel engine in a diesel locomotive causes significant vibration in the driver's cab, which in turn causes the control panel to vibrate. To address this issue, adding mounting points to the vehicle body on both sides of the control panel is commonly used to reduce vibration. However, this approach cannot completely eliminate the impact of the diesel engine on the control panel, and significant vibration still exists on the panel surface.

[0003] Figure 1 and Figure 2 The figure shows the fixing method of the traditional diesel locomotive control panel. Figure 1 and Figure 2 As shown, the bottom of the control panel is fixedly connected to the vehicle body with a movable nut seat pre-welded to the vehicle body by bolts. The movable nut seat is equivalent to a nut with a certain adjustment amount pre-welded in the vehicle body structure. The two sides of the control panel are fixed to the angle steel pre-welded to the vehicle body by bolts.

[0004] use Figure 1 and Figure 2 The mounting method shown above causes console resonance at certain engine speeds during diesel engine startup. This vibration cannot be completely eliminated, adversely affecting the driver's operation and causing irregular noise in the driving environment. Therefore, developing a console mounting solution that can fundamentally eliminate console vibration and improve the operating environment for diesel locomotive drivers is crucial. Summary of the Invention

[0005] The main purpose of the present invention is to provide a vibration-damping control panel for diesel locomotives to solve the problem of resonance of the control panel due to diesel engine vibration, and completely solve the discomfort caused by the vibration of the control panel to the driver.

[0006] According to one aspect of the present invention, a vibration-damping control console for a diesel locomotive is proposed, comprising: a control console body; and a plurality of vibration isolators connected between the body frame of the diesel locomotive and the control console body, wherein the plurality of vibration isolators are located close to the transverse plane where the center of gravity of the control console is located.

[0007] According to one embodiment of the present invention, a plurality of vibration isolators are arranged at the front end, rear end and both sides of the control panel body, wherein the plurality of vibration isolators arranged at the front end and both sides are located close to the horizontal plane where the center of gravity of the control panel is located, and the vibration isolators arranged at the rear end are located on the floor beam steel structure of the vehicle body frame.

[0008] According to one embodiment of the present invention, the vibration isolator has adjustment margins in the lateral, longitudinal and vertical directions.

[0009] According to one embodiment of the present invention, the vehicle body frame is provided with a mounting seat for installing the vibration isolator, and the vehicle body frame, the mounting seat or the console body are provided with one or more of the following mounting holes: mounting holes extending vertically, mounting holes extending laterally and mounting holes extending longitudinally.

[0010] According to one embodiment of the present invention, when installing the console body, a plurality of vibration isolators provided at the front end, the rear end and one side are pre-installed on the vehicle body frame.

[0011] According to one embodiment of the present invention, the operating table further includes a first stop portion and a second stop portion, wherein the first stop portion is arranged on the lateral outside of the operating table body and limits the lateral displacement of the operating table body, and the second stop portion is arranged on the longitudinal outside of the operating table body and limits the longitudinal displacement of the operating table body.

[0012] According to one embodiment of the present invention, the operating table further includes a third stopping portion, and the third stopping portion is arranged below the bottom surface of the operating table body.

[0013] According to one embodiment of the present invention, the vibration isolator includes a first mounting portion and a second mounting portion made of metal material, and a rubber body connected between the first mounting portion and the second mounting portion, wherein the rubber body has a conical structure.

[0014] According to one embodiment of the present invention, the number and type of the vibration isolators are related to the weight of the console body and the operating speed range of the diesel generator set of the diesel locomotive.

[0015] According to one embodiment of the present invention, when the weight of the console body is 400 kg and the operating speed range of the diesel generator set is 400-1000 rpm,

[0016] The number of the vibration isolators is 4, the stiffness of the vibration isolators is 90 kg / cm, and the maximum radial dimension of the vibration isolators is 150 mm; or

[0017] The number of the vibration isolators is 6, the stiffness of the vibration isolators is 60 kg / cm, and the maximum radial dimension of the vibration isolators is 150 mm.

[0018] In the vibration-damping control console for a diesel locomotive according to an embodiment of the present invention, the control console body is connected to the vehicle body frame through multiple vibration isolators, and the multiple vibration isolators are located close to the transverse plane where the center of gravity of the control console body is located, which can effectively reduce the vibration of the control console, thereby improving the driving environment for the driver. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0020] Figure 1 A schematic diagram showing the fixing of the bottom of the console to the floor beam in the prior art;

[0021] Figure 2 A schematic diagram showing a conventional method of fixing a control panel to a vehicle body;

[0022] Figure 3 A schematic diagram showing the overall installation of a vibration isolator in a control console according to an embodiment of the present invention;

[0023] Figure 4 A schematic diagram showing the overall appearance of the console body;

[0024] Figure 5 A schematic diagram showing a suspension scheme for the isolator;

[0025] Figure 6 A schematic diagram showing a suspension scheme for the vibration isolator;

[0026] Figure 7 Show Figure 3 Schematic diagram of the vibration isolator;

[0027] Figure 8 Show Figure 3 Schematic diagram of the vibration isolator located on the left;

[0028] Figure 9 Show Figure 3 Schematic diagram of the vibration isolator located on the right;

[0029] Figure 10 Show Figure 3 Schematic diagram of the vibration isolator located at the front end;

[0030] Figure 11 Show Figure 3 Schematic diagram of the vibration isolator installed at the rear end. DETAILED DESCRIPTION

[0031] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the embodiments of the present invention are further described in detail below in conjunction with specific embodiments and with reference to the accompanying drawings.

[0032] It should be noted that all expressions using "first" and "second" in the embodiments of the present invention are for distinguishing two non-identical entities with the same name or non-identical parameters. It can be seen that "first" and "second" are only for the convenience of expression and should not be understood as limitations on the embodiments of the present invention. Subsequent embodiments will not explain this one by one.

[0033] Figure 3 FIG. 1 is a schematic diagram showing the overall installation of a vibration isolator in a control console according to an embodiment of the present invention. Figure 4 Schematic diagram of the console body 20 is shown. Figure 3 and Figure 4 As shown, the vibration-damping control console for a diesel locomotive includes: a control console body 20; a plurality of vibration isolators 30, connected between the body frame 10 of the diesel locomotive and the control console body 20, and the plurality of vibration isolators 30 are located close to the transverse plane where the center of gravity of the control console body 20 is located.

[0034] The console body 20 may include a plurality of cabinets. Figure 3 and Figure 4 The control panel body 20 is shown as comprising three cabinets. The control panel body 20 is provided with various control buttons, joysticks, instruments and display screens for the driver to use to control the operation of the locomotive. The vibration damping and stability of the control panel body 20 are particularly important.

[0035] In a vibration-damping control console for a diesel locomotive according to an embodiment of the present invention, the control console body 20 is connected to the vehicle frame 10 via multiple vibration isolators 30. These isolators 30 are located near the transverse plane containing the center of gravity of the control console body 20, effectively reducing vibrations of the control console body 20 and improving the driving environment for the driver. The isolators 30 can be located on the transverse plane containing the center of gravity of the control console body 20, or above the transverse plane containing the center of gravity of the control console body 20 and spaced a short distance from the transverse plane, thereby achieving a good vibration reduction effect. The isolators 30 can be located at the center of the isolators 30.

[0036] The inventors of this application recognized that the goal of console vibration reduction is to reduce the vertical vibration transmissibility while maintaining a high lateral stiffness for the locomotive console, and to ensure reliable positioning of the console in the horizontal plane. The console's center of gravity is higher than the base plane, and when vibrating, the console produces not only translational motion but also rotational motion, typically a combination of translational and rotational motion. The console's vibration reduction design strives to achieve decoupling in all directions to avoid additional vibrations from the primary vibration mode.

[0037] Based on the above understanding, this application Figure 5 The isolator underslung solution shown and Figure 6The suspension scheme of the vibration isolators shown has been studied, and it is concluded that the arrangement method described above should be adopted so that the positions of the multiple vibration isolators 30 are close to the transverse plane where the center of gravity of the control console body 20 is located.

[0038] like Figure 5 As shown in the figure, if the vibration isolators are suspended below the center of gravity of the console, all the isolators are installed at the bottom. The rotation axis is vertically close to the isolator mounting surface and at a greater distance from the center of gravity. The eccentric force generated by vertical vibration creates a large additional rotational torque relative to the center of gravity. The vibration amplitude gradually increases from the center of gravity to the console surface, making it impossible to decouple vertical vibration from rotational motion.

[0039] like Figure 6 As shown, if the vibration isolator is suspended above the console's center of gravity, it should be positioned upwards and to the side, with the rotation axis close to the center of gravity. The eccentric force generated by vertical vibration is relatively small compared to the additional moment at the center of gravity, resulting in less vibration caused by the additional motion. The proximity of the rotation axis to the center of gravity decouples vertical and rotational vibrations, preventing additional vibration.

[0040] Therefore, in an embodiment of the present invention, the vibration isolator of the control panel is arranged above the center of gravity plane of the control panel, and the distance between the vibration isolator and the center of gravity plane of the control panel is made small, so as to obtain the best vibration reduction effect.

[0041] Figure 7 Show Figure 3 The schematic diagram of the vibration isolator is as follows: Figure 7 As shown, in some embodiments, the vibration isolator 30 includes a first mounting portion 32 and a second mounting portion 34 made of metal material (e.g., iron), and a rubber body 36 connected between the first mounting portion 32 and the second mounting portion 34. The rubber body 36 has a conical structure, and the radial dimension of the first mounting portion 32 is smaller than the radial dimension of the second mounting portion 34. Both the first mounting portion 32 and the second mounting portion 34 are provided with mounting holes.

[0042] In the embodiment of the present invention, the number and type of vibration isolators 30 are related to the weight of the control console body 20 and the operating speed range of the diesel generator set of the diesel locomotive. When selecting the type of vibration isolator, the frequency and stiffness of the isolator are primarily considered. In addition, the volume of the isolator should also be considered to take into account space requirements.

[0043] When the weight of the console body 20 is 400 kg and the operating speed range of the diesel generator set is 400-1000 rpm, in some embodiments, the number of vibration isolators 30 is 4, the stiffness of the vibration isolator 30 is 90 kg / cm, and the maximum radial dimension of the vibration isolator 30 is 150 mm; in other embodiments, the number of vibration isolators 30 is 6, the stiffness of the vibration isolator 30 is 60 kg / cm, and the maximum radial dimension of the vibration isolator 30 is 150 mm.

[0044] The following describes, in one embodiment of the present invention, how to select and design a vibration isolator by determining the operating speed range of the diesel-generator unit, the vibration level of the mounting base body, the weight of the control panel, and other data, and install it in the appropriate position of the control panel to achieve the purpose of reducing vibration of the control panel.

[0045] In this embodiment, the design input assumes that the operating speed of the diesel engine is 400-1000 rpm, the vibration intensity (vibration speed) of the vehicle body at the bottom of the mounting base is 2.5 mm / s at 400 rpm and 6 mm / s at 1000 rpm, and the weight of the control panel is assumed to be 400 kg.

[0046] The diesel engine speed ranges from 400 to 1000 rpm, corresponding to an excitation frequency f of 6.67 to 16.67 Hz. To achieve vibration isolation across the entire speed range, the console's system natural frequency f0 must be lower than the excitation frequency f. When f / f0 = 1.414, the vibration amplification factor is 1; when f / f0 < 1.414, the vibration amplification factor is greater than 1; and when f / f0 > 1.414, the vibration amplification factor is less than 1. The lower the natural frequency f0 relative to the excitation frequency f, the smaller the vibration amplification factor.

[0047] The design goals are as follows:

[0048] a) The vibration isolation design of the control panel is based on the 400 rpm working condition as the design lower limit, and the vibration amplification factor is ≤1.5. As the speed increases, the vibration amplification factor gradually decreases; the vibration amplification factor of the 1000 rpm working condition is ≤2.5.

[0049] b) No resonance occurs within the diesel generator set speed operating range.

[0050] c) The table top will not have significant rigid body displacement and will not produce collision and friction with the interior.

[0051] d) The size of the vibration isolator should be as small as possible, preferably in a long strip or elliptical shape to reduce space occupation.

[0052] According to the above design goals, JG type vibration isolator can be selected based on the common vibration isolators on the market.

[0053] See Table 1 for vibration isolator selection parameters. Given the console's weight, a specific vibration frequency can be designed to determine the number and stiffness of the isolators, and the vibration amplification factor can be calculated accordingly. Assuming a console weight of 400 kg and a design vibration reduction frequency of 4 to 5 Hz, this ensures a vibration amplification factor between 0.6 and 1.3 at 400 rpm and below 0.10 at 1000 rpm, achieving excellent vibration reduction.

[0054] Table 1 Vibration isolator design parameters

[0055]

[0056] According to the vibration isolator parameter table 2, when the number of vibration isolators is 6, the JG2-1 vibration isolator can barely meet the requirements, and the vertical load slightly exceeds the limit; when the number of vibration isolators is 4, the JG2-2 meets the requirements, and the corresponding frequency is 5Hz.

[0057] Table 2 JG vibration isolator parameters

[0058]

[0059]

[0060] Among them, reference Figure 7 , M is the diameter of the mounting hole on the first mounting part 32; D is the outer diameter of the second mounting part 34, which is also the maximum diameter of the entire vibration isolator 30; D1 is the distance between the two mounting holes on the second mounting part 34; H is the height of the vibration isolator 30; d0 is the diameter of the mounting hole on the second mounting part 34.

[0061] The vibration isolators are selected and designed based on a weight of 400kg. Six JG2-1 vibration isolators or four JG2-2 vibration isolators can be used.

[0062] Figure 8 Show Figure 3 Schematic diagram of the vibration isolator 30 provided on the left side, Figure 9 Show Figure 3 Schematic diagram of the vibration isolator 30 provided on the right side, Figure 10 Show Figure 3 Schematic diagram of the vibration isolator 30 provided at the front end, Figure 11 Show Figure 3 Schematic diagram of the vibration isolator 30 provided at the rear end. Figure 3 、 Figures 8 to 11In an embodiment of the present invention, multiple vibration isolators 30 are arranged at the front end, rear end and both sides of the console body 20. Among them, the multiple vibration isolators 30 arranged at the front end and both sides are located close to the transverse plane where the center of gravity of the console body 20 is located. Considering the operability and convenience of the arrangement, the vibration isolators 30 arranged at the rear end are located on the floor beam steel structure of the vehicle body frame 10 (if the vibration isolators 30 arranged at the rear end are also close to the center of gravity plane of the console body 20, it will cause obstruction or interference to the driver).

[0063] In light of the aforementioned design choices and to minimize space usage, one embodiment of the present invention utilizes four JG2-2 vibration isolators, positioned at the front, rear, and sides of the console body 20. The three isolators 30 located at the front and sides are positioned near the transverse plane of the console body 20's center of gravity. The rear isolator 30 is located on the steel floor beam structure of the vehicle frame 10.

[0064] In some embodiments, the vibration isolator 30 has an adjustment margin in the horizontal direction X, the longitudinal direction Y, and the vertical direction Z. The adjustment margin may be ±10 mm. This facilitates flexible adjustment of the installation position of the vibration isolator 30 when installing the control console, providing good adaptability.

[0065] The vibration isolator can be adjusted horizontally, longitudinally, and vertically by providing multiple mounting holes extending in these directions. The vehicle frame 10 is provided with a mounting base 12 for mounting the vibration isolator 30. The vehicle frame 10, the mounting base 12, or the console body 20 are provided with one or more of the following mounting holes: mounting holes extending in the vertical direction Z, mounting holes extending in the horizontal direction X, and mounting holes extending in the longitudinal direction Y. Alternatively, circular holes with larger diameters can be provided as mounting holes to achieve adjustment margins in different directions within a plane.

[0066] In some embodiments, when installing the console body 20, multiple vibration isolators 30 located at the front, rear, and side are pre-installed on the vehicle frame 10. Once the other side of the console body is adjusted into position, the vibration isolators located on the other side are installed. This allows the pre-installed vibration isolators to be pre-positioned, and for ease of installation, the vibration isolators located on the other side are installed last.

[0067] In some embodiments, the vibration-damping console further includes a first stopper and a second stopper. The first stopper is positioned laterally outward from the console body 20 and limits lateral displacement of the console body 20, while the second stopper is positioned longitudinally outward from the console body 20 and limits longitudinal displacement of the console body 20. The first and second stops can be adjustably mounted on the vehicle frame 10. By providing the first and second stops, the console can be restrained from free lateral and longitudinal displacement during impact. After installation, the overall lateral and longitudinal displacements do not exceed ±2 mm. This further improves the console's vibration damping performance and achieves excellent stability.

[0068] In some embodiments, the vibration-damping console further includes a third stopper disposed below the bottom surface of the console body 20. This third stopper can be adjustably mounted on the steel floor beam structure of the vehicle frame 10. This third stopper prevents the vertical load from exceeding the design load of the vibration isolator in the event of a localized overload (e.g., when a person sits or lies on the console). Once the design travel is exceeded, the load is borne by the third stopper.

[0069] The above-mentioned design of the present invention can ensure that the vibration frequency of the control panel is almost unaffected by the vibration of the diesel engine set, and has a relatively good suppressing effect on the lateral vibration and vertical vibration of the control panel.

[0070] The present invention can at least achieve the following technical effects: first, the structure is simple and the selection is easy, and it is easy to find vibration isolators on the market that can achieve the vibration reduction effect of the control panel; second, the vibration reduction effect is good, and the overall lateral and longitudinal displacement of the control panel after installation can be achieved without exceeding ±2mm; third, it can effectively avoid the resonance problem caused by the diesel engine to the control panel, and provide a good operating environment for the driver.

[0071] Those skilled in the art should understand that the discussion of any of the above embodiments is merely illustrative and is not intended to imply that the scope of the disclosure of the embodiments of the present invention (including the claims) is limited to these examples. Within the spirit of the embodiments of the present invention, the technical features of the above embodiments or different embodiments may be combined, and there are many other variations of the different aspects of the embodiments of the present invention described above, which are not provided in detail for the sake of clarity. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the embodiments of the present invention should be included within the scope of protection of the embodiments of the present invention.

Claims

1. A vibration-damping control console for a diesel locomotive, characterized in that: include: Control panel body; A plurality of vibration isolators are connected between the body frame of the diesel locomotive and the console body, and the plurality of vibration isolators are located close to the transverse plane where the center of gravity of the console body is located; The plurality of vibration isolators are arranged at the front end, rear end and both sides of the console body, wherein the plurality of vibration isolators arranged at the front end and both sides are located close to the transverse plane where the center of gravity of the console body is located, and the vibration isolators arranged at the rear end are located on the floor beam steel structure of the vehicle body frame; The number and type of the vibration isolators are related to the weight of the console body and the operating speed range of the diesel generator set of the diesel locomotive; When the weight of the console body is 400kg and the operating speed range of the diesel generator set is 400~1000rmp, The number of the vibration isolators is 4, the stiffness of the vibration isolators is 90 kg / cm, and the maximum radial dimension of the vibration isolators is 150 mm; or The number of the vibration isolators is 6, the stiffness of the vibration isolators is 60 kg / cm, and the maximum radial dimension of the vibration isolators is 150 mm; The operating table also includes a first stop portion, a second stop portion and a third stop portion. The first stop portion is arranged on the lateral outside of the operating table body and limits the lateral displacement of the operating table body. The second stop portion is arranged on the longitudinal outside of the operating table body and limits the longitudinal displacement of the operating table body. The third stop portion is arranged below the bottom surface of the operating table body.

2. The operating table according to claim 1, characterized in that The vibration isolator has adjustment margins in the lateral, longitudinal and vertical directions.

3. The operating table according to claim 2, characterized in that: The vehicle frame is provided with a mounting seat for installing the vibration isolator, and the vehicle frame, the mounting seat or the console body is provided with one or more of the following mounting holes: mounting holes extending vertically, mounting holes extending laterally and mounting holes extending longitudinally.

4. The operating table according to claim 1, characterized in that When the console body is installed, a plurality of vibration isolators provided at the front end, the rear end and one side are pre-installed on the vehicle body frame.

5. The operating table according to claim 1, characterized in that The vibration isolator includes a first mounting portion and a second mounting portion made of metal material, and a rubber body connected between the first mounting portion and the second mounting portion, wherein the rubber body is a conical structure.

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