Grease lubricated bearing cooling device

Abstract

The application relates to a kind of oil grease lubricated bearing cooling devices, including nozzle being arranged above bearing seat, regulating valve being communicated with the nozzle, water pump being communicated with the regulating valve and water tank;The water pump is communicated with the water tank containing cooling liquid.Also including sensor monitoring bearing seat temperature and controller;The controller is respectively connected with the sensor, regulating valve, water pump signal;The regulating valve includes valve body, valve core being arranged in the valve body and drive mechanism adjusting the opening of the valve core;The beneficial effects of the application are that the opening of the regulating valve can be adjusted by the drive mechanism, thereby ensuring the temperature of the bearing seat, not exceeding the standard, and the opening of the regulating valve can be adjusted in time according to the bearing seat temperature measured by the temperature sensor, which can save energy.

Description

Technical Field

[0001] This invention relates to the field of cooling technology, and in particular to a grease-lubricated bearing cooling device. Background Technology

[0002] Many bearings in the rotating equipment of large thermal power generating units use grease lubrication, which involves adding lubricating grease to the bearing housing to achieve cooling and lubrication during operation. This method requires regular replenishment of lubricating grease, and also necessitates timely monitoring of equipment operation and grease deterioration, increasing maintenance workload. Furthermore, rapid deterioration of the grease can easily cause a sharp rise in bearing temperature, affecting equipment operational safety.

[0003] Many rotating equipment in our plant use grease lubrication, and every year there are cases where the bearing temperature rises above the alarm value due to the deterioration of oil quality and the decrease in cooling effect.

[0004] Currently, our company generally uses air cooling to cool bearings. We have adopted our patented technology (application number 202222697236.8, titled "Cooling Device for Input Bearing of Belt Reducer"), and found that it works very well in winter. However, in summer, when the room temperature is high, the cooling effect is not ideal and needs to be improved.

[0005] Among existing patents, the closest prior art is patent application number CN202020122264.5, entitled "Cooling Device for Rough Rolling Bearings," which discloses a device including a bracket, a first connecting member, a second connecting member, and a retaining ring. A second conveying chamber is formed within the second connecting member, communicating with a first conveying chamber. Multiple spray nozzles are formed along the inner walls of both the first and second connecting members, communicating with the first and second conveying chambers. The retaining ring is fixed to the inner edges of the first and second connecting members, blocking the cooling medium inside the first and second connecting members. The first and second connecting members are fastened to the outer side of the roll near the bearing. The spray nozzles spray cooling medium into the cooling space, thereby cooling the roll. This patent uses a continuous method of spraying coolant for cooling, which cannot precisely adjust the coolant flow rate according to the bearing temperature, resulting in energy inefficiency.

[0006] Another patent, with application number CN201822244877.1 and titled "Cooling Device and Power Generation System for Lower Guide Bearing," discloses a system including a central oil tank, a conveying assembly, and a cooling tank. The conveying assembly is connected to the central oil tank, with part of its structure located inside the cooling tank and another part outside. The conveying assembly is used to transport cooling oil in a circulation between the central oil tank and the cooling tank. This patent requires a separate cooling tank and uses oil for cooling, resulting in a complex structure. Furthermore, it does not adjust the flow rate of the cooling oil according to the bearing temperature, leading to energy inefficiency and requiring improvement. Summary of the Invention

[0007] The technical problem to be solved by the present invention is to provide a grease-lubricated bearing cooling device to solve the problem of high bearing temperature and the need for cooling.

[0008] To solve the above problems, the present invention adopts the following technical solution:

[0009] A grease-lubricated bearing cooling device includes a nozzle disposed above a bearing housing, a regulating valve communicating with the nozzle, a water pump communicating with the regulating valve, and a water tank; the water pump is connected to the water tank containing coolant.

[0010] Furthermore, it also includes a temperature sensor for monitoring the bearing housing temperature and a controller; the controller is connected to the temperature sensor, the regulating valve, and the water pump signal respectively.

[0011] Furthermore, the regulating valve includes a valve body, a valve core disposed within the valve body, and a drive mechanism for adjusting the opening degree of the valve core.

[0012] Furthermore, the valve core includes a left half valve core, a right half valve core, and a rotating shaft;

[0013] One end of the rotating shaft is rotatably connected to the lower part of the valve body; the other end of the rotating shaft is rotatably connected to the left half of the valve core.

[0014] The right half of the valve core is fixedly connected to the middle of the rotating shaft;

[0015] The left half of the valve core is rotatably connected to the upper part of the valve body.

[0016] Furthermore, the drive mechanism includes a bracket fixedly connected to the valve body, a push plate slidably connected to the bracket, a power device for pushing the push plate to slide, and a valve opening adjustment structure disposed between the push plate and the left half valve core and the right half valve core.

[0017] Furthermore, the valve opening adjustment structure includes a bushing fixedly connected to the left half valve core, a right connecting arm provided on the rotating shaft, a left connecting arm provided on the bushing, a left slide rail and a right slide rail provided on the push plate, a right turning pin provided on the right connecting arm, and a left turning pin provided on the left connecting arm.

[0018] The left turn pin is slidably connected to the left slide rail;

[0019] The right turn pin is slidably connected to the right slide rail;

[0020] The middle part of the inner wall of the bushing is rotatably connected to the rotating shaft;

[0021] The outer wall of the bushing is rotatably connected to the valve body.

[0022] Furthermore, the power unit is a cylinder, the cylinder body is hinged to the bracket; the cylinder rod is hinged to the push plate; and the controller is signal-connected to the cylinder.

[0023] Furthermore, the bracket is provided with a rectangular groove, and the push plate is provided with a rectangular head, which slides within the rectangular groove.

[0024] The beneficial effects of this invention are:

[0025] The opening of the regulating valve can be adjusted by the set drive mechanism, thereby ensuring that the temperature of the bearing housing does not exceed the standard. At the same time, the opening of the regulating valve can be adjusted in time according to the temperature of the bearing housing measured by the temperature sensor, which can save energy.

[0026] By spraying coolant through nozzles, the problem of excessively high bearing temperature and poor cooling effect in rotating equipment can be effectively solved. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the structure of the present invention;

[0028] Figure 2 This is a top view of the control valve;

[0029] Figure 3 This is a left view of the regulating valve;

[0030] Figure 4 Left view of the valve core connecting to the bracket;

[0031] Figure 5 This is a schematic diagram showing the connection between the valve core and the valve body;

[0032] Figure 6 This is a schematic diagram of the push plate structure.

[0033] Explanation of the labels in the diagram:

[0034] 1-Bearing housing, 2-Nozzle, 3-Regulating valve, 4-Water pump, 5-Water tank, 6-Temperature sensor;

[0035] 21-Valve body, 22-Right half valve core, 23-Left half valve core, 24-Rotating shaft, 241-Right connecting arm, 25-Shaft sleeve, 26-Bracket, 261-Rectangular groove, 27-Cylinder, 28-Push plate, 281-Rectangular head, 29-Left turning pin, 30-Left connecting arm, 31-Left slide, 32-Right turning pin, 33-Right slide. Detailed Implementation

[0036] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. The described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0037] Example 1

[0038] like Figure 1-6 As shown,

[0039] like Figure 1 As shown, a grease-lubricated bearing cooling device includes a nozzle 2 disposed above a bearing cover 1, a regulating valve 3 connected to the nozzle 2, a water pump 4 connected to the regulating valve 3, and a water tank 5; the water pump 4 is connected to the water tank 5 containing coolant.

[0040] It also includes a temperature sensor 6 for monitoring the temperature of the bearing cover 1 and a controller; the controller is connected to the temperature sensor 6, the regulating valve 3 and the water pump 4 respectively.

[0041] like Figure 2-6 As shown, the regulating valve 3 includes a valve body 21, a valve core disposed within the valve body 1, and a drive mechanism for adjusting the opening degree of the valve core.

[0042] The valve core includes a left half valve core 23, a right half valve core 22, and a rotating shaft 24;

[0043] One end of the rotating shaft 24 is rotatably connected to the lower part of the valve body 21; the other end of the rotating shaft 24 is rotatably connected to the left half valve core 23.

[0044] The right half valve core 22 is fixedly connected to the middle of the rotating shaft 24;

[0045] The left half valve core 23 is rotatably connected to the upper part of the valve body 21.

[0046] The drive mechanism includes a bracket 26 fixedly connected to the valve body 21, a push plate 28 slidably connected to the bracket 26, a power device for pushing the push plate 28 to slide, and a valve opening adjustment structure disposed between the push plate 28 and the left half valve core 23 and the right half valve core 22.

[0047] The valve opening adjustment structure includes a bushing 25 fixedly connected to the left half valve core 23, a right connecting arm 241 provided on the rotating shaft 24, a left connecting arm 30 provided on the bushing 25, a left slide rail 31 and a right slide rail 33 provided on the push plate 28, a right turning pin 32 provided on the right connecting arm 241, and a left turning pin 29 provided on the left connecting arm 30.

[0048] The left pivot pin 29 is slidably connected to the left slide rail 31;

[0049] The right turn pin 32 is slidably connected to the right slide rail 33;

[0050] The middle part of the inner wall of the bushing 25 is rotatably connected to the rotating shaft 24;

[0051] The outer wall of the bushing 25 is rotatably connected to the valve body 21.

[0052] The power unit is a cylinder 27, the cylinder body of which is hinged to the bracket 26; the cylinder rod of the cylinder 27 is hinged to the push plate 28; and the controller is signal-connected to the cylinder 27.

[0053] like Figure 4 and Figure 6 As shown, the bracket 26 is provided with a rectangular groove 261, and the push plate 28 is provided with a rectangular head 281, which slides within the rectangular groove 261.

[0054] It should be noted that the naming of left and right in the view is based on the left and right half of the valve core; it has no special meaning, it is just for clarity.

[0055] The working process of this invention,

[0056] When the valve opening needs to be adjusted, the controller sends a signal to the cylinder 27, the cylinder rod extends or retracts, the push plate 28 moves, the left slide rail 31 on the push plate 28 drives the left rotating pin 29 to rotate around the rotating sleeve 25; the rotating sleeve 25 drives the left half valve core 23 to rotate.

[0057] The right slide rail 33 of the push plate 28 drives the right rotating pin 32 to rotate around the rotating shaft 24, and the rotating shaft 24 drives the right half valve core 22 to rotate, thus opening or closing the valve; the ability to determine the valve opening degree based on the position of the push plate 28 is the core technology of this application.

[0058] Example 2

[0059] This embodiment has a basically the same structure as Embodiment 1.

[0060] The difference is that,

[0061] The power unit includes a motor fixedly connected to the bracket 26, a lead screw fixedly connected to the output end of the motor, and a lead nut fixedly connected to the push plate 28; the lead screw and lead nut are threadedly driven; the motor is a stepper motor, so the distance the lead nut travels, which is the distance the push plate 28 travels, can be determined by the pitch of the lead screw, and thus the opening degree of the valve can be determined, which is more convenient. A cylinder is not as easy to control the travel distance, so this method is more advanced in terms of control than Embodiment 1.

[0062] The controller sends a command to the stepper motor to determine the number of rotations, which can then determine the valve opening degree, making it very convenient.

[0063] Example 3

[0064] This embodiment has a basically the same structure as Embodiment 1.

[0065] The difference is that,

[0066] The left connecting arm 30 is connected to the bushing 25 by a set screw; the right connecting arm 241 is fixed to the rotating shaft 24 by a set screw. The process is simple and the manufacturing is convenient.

[0067] When the bushing 25 is connected to the rotating shaft 24, the part inside the flow channel of the valve body 21 (that is, the bushing at the valve core position, and the bushing part on the side wall of the valve body 21 should be kept as a whole to increase the strength of the bushing) should be divided into two halves along the axis and then fastened together to fix the two halves of the bushing together, which makes installation convenient.

[0068] The above description is merely a preferred embodiment of the present invention; however, the scope of protection of the present invention is not limited thereto; any equivalent substitutions or modifications made by those skilled in the art within the technical scope disclosed in the present invention, based on the technical solution and its improved concept, should be covered within the scope of protection of the present invention.

Claims

1. A grease-lubricated bearing cooling device, characterized in that, It includes a nozzle (2) located above the bearing cover (1), a regulating valve (3) connected to the nozzle (2), a water pump (4) connected to the regulating valve (3), and a water tank (5); the water pump (4) is connected to the water tank (5) containing coolant. It also includes a temperature sensor (6) for monitoring the temperature of the bearing cover (1) and a controller; the controller is connected to the temperature sensor (6), the regulating valve (3), and the water pump (4) respectively. The regulating valve (3) includes a valve body (21), a valve core disposed in the valve body (21), and a drive mechanism for adjusting the opening degree of the valve core; The valve core includes a left half valve core (23), a right half valve core (22), and a rotating shaft (24); one end of the rotating shaft (24) is rotatably connected to the lower part of the valve body (21); the other end of the rotating shaft (24) is rotatably connected to the left half valve core (23); The right half valve core (22) is fixedly connected to the middle of the rotating shaft (24); The left half valve core (23) is rotatably connected to the upper part of the valve body (21); The drive mechanism includes a bracket (26) fixedly connected to the valve body (21), a push plate (28) slidably connected to the bracket (26), a power device for pushing the push plate (28) to slide, and a valve opening adjustment structure provided between the push plate (28) and the left half valve core (23) and the right half valve core (22).

2. The grease-lubricated bearing cooling device according to claim 1, characterized in that: The valve opening adjustment structure includes a bushing (25) fixedly connected to the left half valve core (23), a right connecting arm (241) on the rotating shaft (24), a left connecting arm (30) on the bushing (25), a left slide rail (31) and a right slide rail (33) on the push plate (28), a right turning pin (32) on the right connecting arm (241), and a left turning pin (29) on the left connecting arm (30). The left turn pin (29) is slidably connected to the left slide rail (31); The right turn pin (32) is slidably connected to the right slide rail (33); The inner wall of the bushing (25) is rotatably connected to the rotating shaft (24); The outer wall of the bushing (25) is rotatably connected to the valve body (21).

3. The grease-lubricated bearing cooling device according to claim 2, characterized in that: The power unit is a cylinder (27), the cylinder body of the cylinder (27) is hinged to the bracket (26); the cylinder rod of the cylinder (27) is hinged to the push plate (28); the controller is signal connected to the cylinder (27).

4. The grease-lubricated bearing cooling device according to claim 3, characterized in that: The bracket (26) is provided with a rectangular groove (261), and the push plate (28) is provided with a rectangular head (281), which slides in the rectangular groove (261).

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