A floating support structure and dynamometer platform

Abstract

This utility model discloses a floating support structure and a dynamometer platform, belonging to the field of flat belt dynamometers. The technical solution is as follows: a floating support structure includes a support body and a floating plate sleeved with the support body, the floating plate being able to move up and down; a sealed water supply chamber is formed between the bottom of the floating plate and the top of the support body; at least one open working chamber is provided on the floating plate; the water supply chamber and the working chamber are connected through several damping holes; a water inlet channel communicating with the water supply chamber is provided on the support body, and a one-way valve is provided at the inlet of the water inlet channel. The water inlet channel is connected to a water supply system, which can drive a fluid medium to maintain pressure balance between the working chamber and the water supply chamber. The beneficial effects of this utility model are: it designs two pressure chambers, a water supply chamber and a working chamber, and a floating plate that can move up and down. Because the area of ​​the working chamber is larger than the area of ​​the water supply chamber, it can provide greater pressure support with a smaller water pressure.

Description

Technical Field

[0001] This utility model belongs to the field of flat belt dynamometers, and specifically relates to a floating support structure and dynamometer platform. Background Technology

[0002] A flat belt dynamometer is a specialized device used to test vehicle performance by simulating road driving resistance indoors. When using a flat belt dynamometer for vehicle performance testing, the flat belt (steel belt) supporting the tire experiences significant force, requiring a supporting structure underneath to counteract the downward loading force of the belt (steel belt). In existing technology, the most common supporting structure uses rolling bearings. Through direct contact between the bearing and the steel belt, when the flat belt (steel belt) drives the tire at high speed (120 km / h), the ordinary bearing rotates at 20,000-50,000 rpm, generating enormous heat. Ordinary bearings cannot dissipate heat quickly enough, leading to damage. Simultaneously, during testing, the vehicle body or tires exert significant impact on the bearings; without any cushioning, this easily causes damage to the bearings or shaft. Utility Model Content

[0003] The purpose of this utility model is to provide a floating support structure and a dynamometer platform having the floating support structure.

[0004] This utility model is achieved through the following measures: In a first aspect, this embodiment provides a floating support structure, characterized in that it includes a support body and a floating plate sleeved with the support body, and the floating plate is capable of moving up and down; A sealed water supply chamber is formed between the bottom of the floating plate and the top of the support. The floating plate is provided with at least one working chamber with an open top. The water supply chamber and the working chamber are connected by several damping holes; The support body is provided with a water inlet channel that communicates with the water supply chamber. A one-way valve is provided at the inlet of the water inlet channel. The water inlet channel is connected to the water supply system. The water supply system can drive the fluid medium to achieve pressure balance between the working chamber and the water supply chamber.

[0005] The water supply system generally adopts a constant pressure water supply system, and the fluid medium is generally a high pressure medium, which can be water.

[0006] Furthermore, the upper part of the support body is provided with a boss, and the lower part of the floating plate is provided with a slot that fits around the boss, or the lower part of the floating plate is provided with a boss, and the upper part of the support body is provided with a slot that fits around the boss.

[0007] Furthermore, a sealing ring is provided on the outer wall of the boss and / or the inner wall of the slot.

[0008] Furthermore, the area of ​​the working chamber is larger than the area of ​​the water supply chamber. Preferably, the area of ​​the working chamber is 3-6 times the area of ​​the water supply chamber.

[0009] Furthermore, the working chamber is divided into at least two smaller working chambers, which are not interconnected, and each smaller working chamber is connected to the water supply chamber through at least one damping hole.

[0010] Furthermore, it also includes a water collection tank, with the support body fixed inside the water collection tank. The side walls of the water collection tank are all located outside the floating plate and the support body. The water collection tank is provided with a return water hole communicating with the outside. The return water hole is used to collect the used low-pressure water into an external water tank for recycling. The bottom of the water collection tank is provided with a recessed return water trough, and the return water hole is located on the return water trough.

[0011] Furthermore, both the water outlet and the damping orifice are designed in a funnel shape that is wider at the top and narrower at the bottom.

[0012] Secondly, this embodiment provides a dynamometer platform, including a dynamometer. The dynamometer includes a frame, an active hub and a driven hub mounted on the frame, and a steel belt for transmission between the active hub and the driven hub. The dynamometer is characterized by further including the floating support structure, which is located between the active hub and the driven hub and below the steel belt. The active hub is driven by a motor, which is mounted on the frame.

[0013] When the working chamber and the water supply chamber are in pressure balance, there is a gap between the upper end face of the floating plate and the steel strip.

[0014] Furthermore, the water collection tank is fixed on the frame.

[0015] Furthermore, a scraper is fixedly installed on the side wall of the water collection tank, and the upper end face of the scraper contacts the lower surface of the steel strip. The scraper is arranged along the width direction of the steel strip and is used to scrape away most of the water stains on the steel strip.

[0016] Furthermore, the height of the gap is no greater than 0.1 mm, and preferably between 0.01 and 0.065 mm.

[0017] Furthermore, the working chamber, water supply chamber, boss, and slot are generally of regular geometric shape, the working chamber is preferably rectangular, and the water supply chamber, boss, and slot are preferably of waist-shaped groove structure.

[0018] The specific workflow of a dynamometer platform with a floating support structure includes: 1. No tires loaded, pressure balanced. At the start of operation, the steel belt of the flat belt dynamometer becomes smooth and flat under the action of the tensioning system. High-pressure water flows into the water supply chamber through the inlet channel after passing through the one-way valve. Due to the presence of the damping orifice, the pressure in the working chamber is less than that in the water supply chamber (i.e., the working chamber and the water supply chamber are not in pressure balance), and the floating plate moves upward. As high-pressure water continues to enter the working chamber through the damping orifice, the working chamber is gradually pressurized until the working chamber and the water supply chamber are in pressure balance. That is, the pressure in the working chamber × the area of ​​the working chamber = the pressure in the water supply chamber × the area of ​​the water supply chamber. At this point, the floating plate will stabilize at the balance point and "float".

[0019] 2. Load the tires and rebalance the forces. When the tested tire contacts the steel belt, the steel belt deforms slightly due to the downward tire load. This deformation reduces the gap between the steel belt and the floating plate, increasing the drainage resistance in the working chamber and thus raising the pressure within the chamber. This generates a greater upward lifting force, counteracting the downward pressure from the tire, and ultimately restoring system balance. The one-way valve prevents backflow of water, avoiding collisions caused by "pressure loss" and enhancing impact resistance. The water pressure and gap changes during this process are automatically adjusted.

[0020] 3. Tire rotation (dynamic operation) When the tire starts to rotate at high speed (e.g., 120 km / h), since there is no contact between the steel belt and the floating plate, the water film formed between the floating plate and the steel belt plays a role in lubrication and cooling, and will not generate heat. The continuously flowing water will carry away the heat on the steel belt.

[0021] Because the bearing floating plate can move up and down, even if the frame of the flat belt dynamometer is not parallel to the steel belt during production or under special circumstances, the bearing floating plate can automatically adjust and can be used normally, which greatly reduces the processing requirements of the frame.

[0022] The beneficial effects of the technical solution provided by this utility model embodiment are as follows: This utility model is designed with two pressure chambers, a water supply chamber and a working chamber, and a floating plate that can float up and down. Since the area of ​​the working chamber is larger than that of the water supply chamber, a smaller water pressure can provide greater pressure support, minimizing the power consumption of the floating plate under the same load-bearing capacity. The one-way valve prevents water backflow and improves the impact resistance of the floating plate. Attached Figure Description

[0023] To more clearly illustrate the technical solution of this utility model, the accompanying drawings used in the embodiments will be briefly introduced below. Obviously, the drawings listed below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1This is a schematic diagram of the floating support structure in an embodiment of this utility model; Figure 2 Internal structural diagram of the floating support structure in this embodiment of the utility model; Figure 3 This is an exploded view of the floating support structure in an embodiment of this utility model; Figure 4 This is a schematic diagram of the water collection tank in an embodiment of this utility model; Figure 5 This is a schematic diagram of the structure of the floating plate in an embodiment of this utility model; Figure 6 This is a schematic diagram of the structure of a dynamometer platform according to an embodiment of this utility model; Figure 7 This is a schematic diagram of the internal structure of a dynamometer platform. Figure 8 This is a schematic diagram of the structure of multiple small working cavities in an embodiment of this utility model.

[0025] The components represented by each number in the attached diagram are listed below: 1. Support body; 2. Floating plate; 3. Water collection tank; 4. Damping hole; 5. Sealing ring; 6. Squeegee; 7. Driven hub; 8. Driven hub; 9. Steel belt; 10. Frame; 11. Check valve; 12. Motor; 101. Water inlet channel; 102. Boss; 103. Water supply chamber; 10301. Groove; 201. Working chamber; 202. Slot; 203. Drainage tank; 301. Return water hole. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of this utility model clearer, the following detailed description is provided in conjunction with embodiments. Of course, the specific embodiments described herein are merely illustrative of this utility model and are not intended to limit its scope.

[0027] Example 1: See Figures 1-5 A floating support structure, characterized in that it includes a support body 1 and a floating plate 2 sleeved with the support body 1, and the floating plate 2 is capable of moving up and down; A sealed water supply chamber 103 is formed between the bottom of the floating plate 2 and the top of the support body 1; The floating plate 2 is provided with at least one open working chamber 201; The water supply chamber 103 and the working chamber 201 are connected by several damping holes 4; The support body 1 is provided with a water inlet channel 101 that communicates with the water supply chamber 103. A one-way valve 11 is provided at the inlet of the water inlet channel 101. The water inlet channel 101 is connected to the water supply system. The water supply system can drive the fluid medium to make the working chamber 201 and the water supply chamber 103 reach pressure balance.

[0028] Water supply systems generally adopt constant pressure water supply systems, and the fluid medium is generally a high pressure medium, which can be water.

[0029] The upper part of the support body 1 is provided with a boss 102, and the lower part of the floating plate 2 is provided with a slot 202 that fits around the boss 102. A sealing ring 5 is provided on the outer wall of the boss 102.

[0030] The area of ​​the working chamber 201 is larger than the area of ​​the water supply chamber 103. During use, both the water supply chamber 103 and the working chamber 201 are filled with liquid. The area refers to the effective working area of ​​the water supply chamber 103 and the working chamber 201. The area of ​​the working chamber 201 is 3-6 times the area of ​​the water supply chamber 103.

[0031] It also includes a water collection tank 3, with the support body 1 fixed inside the water collection tank 3. The side walls of the water collection tank 3 are all located outside the floating plate 2 and the support body 1. The water collection tank 3 is provided with a return water hole 301 that communicates with the outside. The return water hole 301 is used to collect the used low-pressure water into an external water tank for recycling.

[0032] The bottom of the water collection tank 3 is provided with a recessed return water tank, and the return water hole 301 is provided on the return water tank.

[0033] Example 2: See Figures 1-7 A dynamometer platform includes a dynamometer, which includes a frame 10, a drive hub 7 and a driven hub 8 disposed on the frame 10, and a steel belt 9 for transmitting power between the drive hub 7 and the driven hub 8. The platform is characterized by further including the floating support structure as described in Embodiment 1, which is located between the drive hub 7 and the driven hub 8 and below the steel belt 9. The drive hub 7 is driven by a motor 12, which is disposed on the frame 10.

[0034] When the working chamber 201 and the water supply chamber 103 are in pressure balance, there is a gap between the upper end face of the floating plate 2 and the steel strip 9.

[0035] The water collection tank 3 is fixed on the frame 10.

[0036] A squeegee 6 is fixedly installed on the side wall of the water collection tank 3, and the upper end face of the squeegee 6 contacts the lower surface of the steel strip 9. The squeegee 6 is arranged along the width direction of the steel strip 9. The squeegee 6 is used to scrape away most of the water stains on the steel strip 9.

[0037] The height of the gap should not exceed 0.1mm, and is preferably between 0.01-0.065mm.

[0038] The working chamber 201, water supply chamber 103, boss 102, and slot 202 are generally regular geometric shapes. The working chamber 201 is preferably rectangular, and the water supply chamber 103, boss 102, and slot 202 are preferably waist-shaped groove structures.

[0039] The specific workflow of a dynamometer platform with a floating support structure includes: 1. No tires loaded, pressure balanced. At the start of operation, the steel belt 9 of the flat belt dynamometer becomes smooth and flat under the action of the tensioning system. High-pressure water flows into the water supply chamber 103 through the inlet channel 101 after passing through the one-way valve 11. Due to the presence of the damping orifice 4, the pressure in the working chamber 201 is less than that in the water supply chamber 103 (i.e., the working chamber 201 and the water supply chamber 103 are not in pressure balance), and the floating plate 2 moves upward. As high-pressure water continuously enters the working chamber 201 through the damping orifice 4, the working chamber 201 is gradually pressurized until the working chamber 201 and the water supply chamber 103 are in pressure balance. That is, the pressure of the working chamber 201 × the area of ​​the working chamber 201 = the pressure of the water supply chamber 103 × the area of ​​the water supply chamber 103. At this time, the floating plate 2 will stabilize at the balance point and "float" up while maintaining a gap between the steel belts 9.

[0040] 2. Load the tires and rebalance the forces. When the tested tire contacts the steel belt 9, the steel belt 9 deforms slightly due to the downward tire load. This deformation reduces the gap between the steel belt 9 and the floating plate 2, increasing the water drainage resistance of the working chamber 201. This increases the pressure in the working chamber 201, generating a greater upward lifting force to counteract the downward pressure from the tire, ultimately restoring system balance. The one-way valve 11 prevents backflow of water, avoiding collisions caused by "pressure loss" and improving impact resistance. During this process, a water film forms between the floating plate 2 and the steel belt 9, providing lubrication and cooling.

[0041] 3. Tire rotation (dynamic operation) When the tire starts to rotate at high speed (e.g., 120 km / h), since there is no contact between the steel belt 9 and the floating plate 2, the water film formed between the floating plate 2 and the steel belt 9 plays a role in lubrication and cooling, and will not generate heat. The continuously flowing water will carry away the heat on the steel belt 9.

[0042] Since the bearing floating plate 2 can move up and down, even if the frame 10 of the flat belt dynamometer is not parallel to the steel belt 9 during production or under special circumstances, the bearing floating plate 2 can automatically adjust and can be used normally, which greatly reduces the processing requirements of the frame 10.

[0043] Example 3: See Figure 8Based on Embodiment 1 or Embodiment 2, the working chamber 201 is divided into at least two small working chambers, which are not connected to each other, and each small working chamber is connected to the water supply chamber 103 through at least one damping hole 4.

[0044] Each of the two adjacent small working chambers is provided with a drain trough 203, and all drain troughs 203 are connected.

[0045] During support, if the supported component experiences eccentric stress, each working chamber 201 can independently bear the pressure. For example, during tire rotation testing, under normal circumstances, the tire is positioned in the middle of the steel belt 9, with uniform force. When the tire shifts on the floating plate 2, if there is only one working chamber 201, the force will be eccentric, and localized contact will occur between the floating plate 2 and the steel belt 9, which is unacceptable. In this case, having multiple working chambers 201, each capable of independently bearing pressure, ensures effective support for the tire. Furthermore, the presence of the drainage groove 203 allows for timely pressure relief and drainage of any working chamber 201 when it is independently under pressure.

[0046] Example 4: Based on Example 2, when the pressures of the working chamber 201 and the water supply chamber 103 are similar, the water flow rate is too high, causing the high-pressure medium (water) to splash. Simultaneously, the rigidity of the float plate deteriorates, and the external force required to change the gap between the float plate 2 and the steel belt 9 by 1 micrometer is significantly reduced. When the pressure difference is too large, the water flow rate is too small, and under the impact, the float plate 2 will directly contact the steel belt 9, and the high-pressure water flow is insufficient to remove the heat generated by the steel belt 9. Therefore, the pressure of the working chamber 201 is generally 0.15-0.6 times that of the water supply chamber 103. Since, under pressure equilibrium, the pressure of the working chamber 201 × the area of ​​the working chamber 201 = the pressure of the water supply chamber 103 × the area of ​​the water supply chamber 103, the area of ​​the working chamber 201 is correspondingly larger than the area of ​​the water supply chamber 103. The area of ​​the working chamber 201 is generally 3-6 times the area of ​​the water supply chamber 103.

[0047] When the area of ​​the working chamber is larger than that of the water supply chamber, a larger pressure support can be provided with a smaller water pressure. The one-way valve 11 prevents water backflow and improves the impact resistance of the floating plate.

[0048] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A floating support structure, characterized by, It includes a support body and a floating plate sleeved with the support body, wherein the floating plate is capable of moving up and down; A sealed water supply chamber is formed between the bottom of the floating plate and the top of the support. The floating plate is provided with at least one working chamber with an open top. The water supply chamber and the working chamber are connected by several damping holes; The support body is provided with a water inlet channel that communicates with the water supply chamber. A one-way valve is provided at the inlet of the water inlet channel. The water inlet channel is connected to the water supply system. The water supply system can drive the fluid medium to achieve pressure balance between the working chamber and the water supply chamber.

2. The floating support structure according to claim 1, characterized in that, The area of ​​the working chamber is larger than the area of ​​the water supply chamber.

3. The floating support structure of claim 2, wherein, The area of ​​the working chamber is 3-6 times the area of ​​the water supply chamber.

4. The floating support structure of claim 1, wherein, The working chamber is divided into at least two smaller working chambers, which are not interconnected. Each smaller working chamber is connected to the water supply chamber through at least one damping hole.

5. The floating support structure of claim 4, wherein, Each of the two adjacent small working chambers is provided with a drain trough, and all the drain troughs are interconnected.

6. The floating support structure of claim 1, wherein, The damping orifice is funnel-shaped, wider at the top and narrower at the bottom.

7. The floating support structure according to any one of claims 1 to 6, wherein It also includes a water collection tank, the support body is fixed inside the water collection tank, the side walls of the water collection tank are all located outside the floating plate and the support body, and the water collection tank is provided with a return water hole communicating with the outside.

8. A dynamometry platform comprising a dynamometer comprising a frame, a driving hub and a driven hub arranged on the frame, a steel belt implementing the transmission between the driving hub and the driven hub, characterized in that, It also includes the floating support structure of claim 7, wherein the floating support structure is located between the driving hub and the driven hub and below the steel strip; When the working chamber and the water supply chamber are in pressure balance, there is a gap between the upper end face of the floating plate and the steel strip.

9. The dynamometer platform of claim 8, wherein, The height of the gap is no greater than 0.1 mm.

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