A rotary axial force loading device

Abstract

The object of the present invention is to provide a rotary axial force loading device, which includes a thrust shaft system, a hydraulic cylinder, a first radial support bearing seat, a second radial support bearing seat, and a bracket. The first radial support bearing seat, the second radial support bearing seat, and the bracket are respectively fixed on the foundation through fixing bolts. The hydraulic cylinder is installed on the bracket. The thrust shaft system sequentially passes through the first radial support bearing seat, the hydraulic cylinder, and the second radial support bearing seat, and is radially supported by the first radial support bearing seat and the second radial support bearing seat. The thrust shaft system includes a thrust shaft, and a driving flange and a thrust flange are respectively installed at both ends of the thrust shaft. The driving flange is connected to a driving device, and the thrust flange is connected to a clutch under test. The present invention adopts a structure in which the thrust shaft passes through the center of the cylinder, and through the spherical roller thrust bearing between the cylinder piston and the thrust shaft, the function of transmitting the fixed cylinder thrust to the rotating thrust shaft is realized, and the device structure is compact.

Description

Technical Field

[0001] The present invention relates to an axial force loading device, specifically an axial force loading device for a thrust bearing. Background Art

[0002] A synchronous automatic clutch is a one-way overrunning clutch, mainly composed of an input component, a sliding component and an output component. When the rotational speed of the clutch input end is greater than that of the output end, the clutch automatically engages; when the rotational speed of the clutch input end is less than that of the output end, the clutch automatically disengages. As a connecting device in a mechanical system, it has a wide range of applications in industries such as ships, power, steel, and chemical industries. Generally, when thrust bearings are respectively arranged for the devices at both ends of the clutch, the synchronous automatic clutch does not need to transmit axial thrust, and a thrust bearing does not need to be arranged inside the clutch. When only one end of the clutch input end and the output end is provided with an axially positioned thrust bearing and the other end is in a free state, a thrust bearing needs to be arranged inside the clutch. For example, in a certain ship propulsion shafting, the clutch input end is the propulsion main engine I, the output end is the propulsion main engine II and the propeller, the propulsion main engine I is provided with a fixed thrust bearing, and the propulsion main engine II is not provided with a thrust bearing. When the propulsion shafting is working, the thrust generated by the propeller is transmitted to the fixed thrust bearing of the propulsion main engine I through the propulsion main engine II and the clutch, and finally the thrust acts on the hull through the fixed thrust bearing, enabling the hull to sail. The clutch in this shafting not only needs to achieve power switching but also needs to transmit the shafting thrust, and a thrust bearing needs to be arranged inside the clutch.

[0003] To verify the performance of the thrust bearing inside the clutch, an axial thrust loading test needs to be carried out on it. The thrust bearing inside the clutch is different from the thrust bearing on the shafting. The thrust bearing on the shafting is usually fixed in the bearing housing and is always in a static state, and the thrust load can be directly applied to the fixed bearing housing. While the thrust bearing inside the clutch is usually arranged on the output component, and the thrust disk is arranged on the input component. When the clutch is working, both the thrust bearing and the thrust disk are in a rotating state, and the thrust load cannot be applied. Summary of the Invention

[0004] The purpose of the present invention is to provide a rotary axial force loading device that can solve the problem that axial force loading cannot be carried out when the thrust bearing and the thrust disk inside the synchronous automatic clutch are both in a rotating state during the performance verification test of the thrust bearing.

[0005] The purpose of the present invention is achieved as follows:

[0006] A rotary axial force loading device of the present invention is characterized in that it includes a thrust shaft system, a hydraulic cylinder, a first radial support bearing seat, a second radial support bearing seat, and a bracket. The first radial support bearing seat, the second radial support bearing seat, and the bracket are respectively fixed on the foundation through fixing bolts. The hydraulic cylinder is installed on the bracket. The thrust shaft system sequentially passes through the first radial support bearing seat, the hydraulic cylinder, and the second radial support bearing seat, and is radially supported by the first radial support bearing seat and the second radial support bearing seat. The thrust shaft system includes a thrust shaft, and a drive flange and a thrust flange are respectively installed at both ends of the thrust shaft. The drive flange is connected to a drive device, and the thrust flange is connected to a clutch under test.

[0007] The present invention may further include:

[0008] 1. The hydraulic cylinder includes a cylinder block and a cylinder piston. The cylinder piston is of a hollow structure. The thrust shaft passes through the cylinder piston, and a spherical roller thrust bearing is installed on the part of the thrust shaft located inside the cylinder piston. The spherical roller thrust bearing fixes its bearing outer ring inside the cylinder piston through a piston round nut. Shaft seals are installed at both ends of the cylinder piston to form a closed space, and the closed space is filled with grease. The cylinder block is located outside the cylinder piston and is fixed on the bracket. The cylinder piston divides the cylinder block into a first working space and a second working space of the cylinder. A cylinder end cover is installed at the end of the cylinder block where the first working space of the cylinder is located. An oil port A for cylinder working oil and an oil port B for cylinder working oil are provided on the cylinder block. The oil port A for cylinder working oil communicates with the first working space of the cylinder, and the oil port B for cylinder working oil communicates with the second working space of the cylinder.

[0009] 2. An anti-rotation pin is installed on the cylinder piston, and an anti-rotation frame is installed on the cylinder end cover. The anti-rotation pin is stuck inside the anti-rotation frame to limit the rotation of the cylinder piston.

[0010] 3. Cylindrical roller bearings are provided in the first radial support bearing seat and the second radial support bearing seat. The thrust shaft includes a thrust shaft support surface, and the thrust shaft support surface is in direct contact with the two cylindrical roller bearings.

[0011] 4. The thrust shaft support surface is hardened.

[0012] 5. Bolt through-holes for the cylinder block are provided on the cylinder block, and cylinder block bolts are installed in the bolt through-holes for the cylinder block. The cylinder block is fixed to the bracket through the cylinder block bolts. The diameter of the bolt through-holes for the cylinder block is larger than the diameter of the cylinder block bolts, and the diameter difference is 6 mm. A bracket vertical plate is provided on the bracket. The cylinder block passes through the inner hole of the vertical plate of the bracket vertical plate and is partially located inside the bracket vertical plate. The diameter of the inner hole of the vertical plate is larger than the outer diameter of the cylinder block, and the diameter difference is 6 mm.

[0013] The advantages of the present invention are as follows: The present invention adopts a structure in which the thrust shaft passes through the center of the oil cylinder. Through the spherical roller thrust bearing between the oil cylinder piston and the thrust shaft, the function of transmitting the fixed oil cylinder thrust to the rotating thrust shaft is realized, and the device structure is compact. Description of the Drawings

[0014] Figure 1 It is a schematic diagram of the clutch structure containing a thrust bearing inside;

[0015] Figure 2 It is a three-dimensional view of the rotary axial force loading device of the present invention;

[0016] Figure 3 It is a sectional view of the rotary axial force loading device of the present invention;

[0017] Figure 4 It is a partial sectional view of the rotary axial force loading device after the working oil port A of the oil cylinder is filled with oil;

[0018] Figure 5 It is a partial sectional view of the rotary axial force loading device after the working oil port B of the oil cylinder is filled with oil;

[0019] Figure 6 It is a schematic diagram of the anti-rotation frame and anti-rotation pin;

[0020] Figure 7 It is a schematic diagram of the centering installation process of the rotary axial force loading device. Detailed Embodiment

[0021] The present invention will be described in more detail with reference to the accompanying drawings as follows:

[0022] Combined with Figure 1-7 As shown in Figure 1 It is a structure of a typical thrust bearing 510 inside the clutch. Through the thrust bearing 510 inside the clutch, the thrust of the clutch input assembly 500 can be transmitted to the clutch input assembly 500. When conducting the loading test on the thrust bearing 510 inside the clutch, three working conditions of the clutch need to be simulated: 1. When the clutch is disengaged, the clutch input assembly 500 and the thrust disk 710 are stationary, and the clutch output assembly 500 and the thrust bearing 510 inside the clutch rotate; 2. When the clutch is engaged, the clutch input assembly 500, the thrust disk 710, the clutch output assembly 500, and the thrust bearing 510 inside the clutch rotate together, but the relative rotational speed is 0; 3. The clutch output assembly 500 and the thrust bearing 510 inside the clutch rotate at a certain rotational speed, and the clutch input assembly 500 and the thrust disk 710 increase or decrease in speed. In the above three cases, an axial force loading device and an axial load need to be applied to the clutch.

[0023] As shown in Figure 2As shown in the figure, the present invention provides a rotary axial force loading device, which mainly consists of a thrust shaft system 100, a radial support bearing seat 200, a hydraulic cylinder 300, and a bracket 400. Two radial support bearing seats 200 are distributed on both sides of the hydraulic cylinder 300 and the bracket 400. The radial support bearing seats 200 and the bracket 400 are fixed to the foundation by fixing bolts 700.

[0024] As Figure 3 shown, the radial support of the thrust shaft system 100 relies on two cylindrical roller bearings 210. The cylindrical roller bearings 210 have no bearing inner rings, and the cylindrical rollers are in direct contact with the thrust shaft support surface 111 of the thrust shaft 110. The thrust shaft support surface 111 has been hardened, and the thrust shaft system 100 can produce a large axial displacement relative to the radial support cylindrical roller bearings 210. The thrust flange 130 is pressed against the thrust shaft 110 by two flange nuts 140. The thrust flange 130 is connected to the clutch under test and can transmit axial forces in two directions to the clutch. The drive flange 120 is connected to the drive device, and the thrust shaft system 100 can transmit rotational motion to the clutch.

[0025] As Figure 4 shown, two spherical roller thrust bearings 160 are clamped on the protrusion of the thrust shaft 110, and two thrust bearing nuts 150 fix the bearing inner rings of the spherical roller thrust bearings 160 on the thrust shaft 110. The cylinder piston 330 is of a hollow structure, and the thrust shaft 110 and the spherical roller thrust bearings 160 pass through the cylinder piston 330. The piston nut 340 fixes the bearing outer rings of the spherical roller thrust bearings 160 inside the cylinder piston 330. Shaft seals 350 are installed at both ends of the cylinder piston 330 to form a closed space, and the closed space is filled with grease to provide lubrication for the two spherical roller thrust bearings 160. The cylinder block 310 is fixed to the bracket 400 by cylinder block bolts 313. After the working oil port A 301 of the hydraulic cylinder is supplied with oil, an axial force in the direction shown in Figure 4 is generated on the thrust shaft system 100 through the cylinder piston 330 and the left spherical roller thrust bearing 160; after the working oil port B 302 of the hydraulic cylinder is supplied with oil, an axial force in the direction shown in Figure 5 is generated on the thrust shaft system 100 through the cylinder piston 330 and the right spherical roller thrust bearing 160. As Figure 3 shown, in addition to the fixing bolts 700, a positioning key 420 is installed between the bracket 400 and the foundation, which can greatly improve the axial positioning ability of the bracket 400 and provide a greater axial force for the thrust shaft system 100.

[0026] As Figure 4As shown, when the spherical roller thrust bearing 160 transmits the axial force and the thrust shaft 110 rotates, the frictional forces between the rollers and the inner and outer rings and between the shaft seal 350 and the thrust shaft 110 will generate a certain frictional torque on the oil cylinder piston 330. To prevent the oil cylinder piston 330 from being rotated, an anti-rotation pin 331 is installed on the oil cylinder piston 330, and an anti-rotation bracket 321 is installed on the cylinder head cover 320. As Figure 6 shown, the anti-rotation pin 331 is stuck in the anti-rotation bracket 321, which can limit the rotation of the oil cylinder piston 330 but does not limit its axial movement.

[0027] Since the thrust shaft system 100 is equivalent to having three support points, it is necessary to explain the centering installation process thereof. When initially in place, the cylinder block bolts 313 are not connected, and the oil cylinder block 310 and the bracket 400 are in a dispersed state. As Figure 7 shown, the two cylindrical roller bearings 210 are adjusted to match the centering state of the thrust shaft system 100 and another shaft system. After centering is completed, the two cylindrical roller bearings 210 are fixed. The diameter of the inner hole 411 of the vertical plate of the vertical plate 410 of the bracket 400 on the bracket is larger than the outer diameter 311 of the cylinder block, and the typical value of the diameter difference is 6 mm. The diameter of the cylinder block bolt through hole 312 is larger than the diameter of the cylinder block bolt 313, and the typical value of the diameter difference is also 6 mm. Due to the large radial space, after the thrust shaft system 100 is positioned by the two cylindrical roller bearings 210, the bracket 400 only needs simple low-precision adjustment to be connected to the oil cylinder block 310, avoiding over-positioning of the thrust shaft system 100.

Claims

1. A rotary axial force loading device, characterized in that: It includes a thrust shafting, a hydraulic cylinder, a first radial support bearing seat, a second radial support bearing seat, and a bracket. The first radial support bearing seat, the second radial support bearing seat, and the bracket are respectively fixed on the foundation by fixing bolts. The hydraulic cylinder is installed on the bracket. The thrust shafting sequentially passes through the first radial support bearing seat, the hydraulic cylinder, and the second radial support bearing seat, and is radially supported by the first radial support bearing seat and the second radial support bearing seat. The thrust shafting includes a thrust shaft. Driving flanges and thrust flanges are respectively installed at both ends of the thrust shaft. The driving flange is connected to the driving equipment, and the thrust flange is connected to the clutch under test. The hydraulic cylinder includes a cylinder body and a cylinder piston. The cylinder piston is of a hollow structure. The thrust shaft passes through the cylinder piston. A spherical roller thrust bearing is installed on the part of the thrust shaft located inside the cylinder piston. The outer ring of the spherical roller thrust bearing is fixed inside the cylinder piston by a piston round nut. Shaft seals are installed at both ends of the cylinder piston to form a closed space, and the closed space is filled with grease. The cylinder body is located outside the cylinder piston and fixed on the bracket. The cylinder piston divides the cylinder body into a first cylinder working space and a second cylinder working space. A cylinder end cover is installed at the end of the cylinder body where the first cylinder working space is located. An oil port A for cylinder working oil and an oil port B for cylinder working oil are provided on the cylinder body. The oil port A for cylinder working oil communicates with the first cylinder working space, and the oil port B for cylinder working oil communicates with the second cylinder working space.

2. The rotary axial force loading device according to claim 1, characterized in that: An anti-rotation pin is installed on the cylinder piston, and an anti-rotation bracket is installed on the cylinder end cover. The anti-rotation pin is stuck inside the anti-rotation bracket to limit the rotation of the cylinder piston.

3. The rotary axial force loading device according to claim 1, characterized in that: Cylindrical roller bearings are provided in the first radial support bearing seat and the second radial support bearing seat. A thrust shaft support surface is included on the thrust shaft, and the thrust shaft support surface is in direct contact with the two cylindrical roller bearings.

4. The rotary axial force loading device according to claim 3, characterized in that: The thrust shaft support surface is hardened.

5. The rotary axial force loading device according to claim 1, characterized in that: Bolt through-holes for the cylinder body are provided on the cylinder body. Cylinder body bolts are installed in the bolt through-holes for the cylinder body. The cylinder body is fixed to the bracket by the cylinder body bolts. The diameter of the bolt through-holes for the cylinder body is larger than the diameter of the cylinder body bolts, and the diameter difference is 6 mm. A vertical plate of the bracket is provided on the bracket. The cylinder body passes through the inner hole of the vertical plate of the vertical plate of the bracket and is partially located inside the vertical plate of the vertical plate of the bracket. The diameter of the inner hole of the vertical plate is larger than the outer diameter of the cylinder body, and the diameter difference is 6 mm.

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