A split type electronically controlled silicone oil clutch water pump

Abstract

The present invention discloses a split type electronically controlled silicone oil clutch water pump, wherein a clutch part is rigidly connected and fixed together with a shaft-connecting bearing of a driven shaft and a water pump part. The clutch water pump aims to change the original stacked assembly method, reduces the risk of jamming of the active part and the driven part, optimizes the separation coupling response time, more accurately corrects the speed of the impeller, better reduces the engine fuel consumption and meets the requirements of the engine cooling system, and increases the life of the cooling system components.

Description

Technical Field

[0001] The invention relates to the field of cooling systems, in particular to a split type electronically controlled silicone oil clutch water pump. Background Art

[0002] With the continuous application and promotion of the electronically controlled silicone oil clutch water pump, customers are paying more and more attention to the product performance of the electronically controlled silicone oil clutch water pump, just to extend the service life of the electronically controlled silicone oil clutch water pump and improve the product performance of the electronically controlled silicone oil clutch water pump.

[0003] Since the current electronically controlled silicone oil clutch water pump adopts the structure that the active part provides the power source to drive the driven part to rotate, thereby realizing the working mode of the water pump impeller, the bearing is used between the active part and the driven part to provide rotation support to ensure the rotation accuracy. For example, patent CN 110966078 B "electronically controlled silicone oil clutch of mechanical water pump for internal combustion engine" adopts such a working mode. However, when the rotation torque of the bearing between the active part and the driven part is too large and the bearing load is too high for a long time, the bearing is very likely to be damaged. In such a working mode, after the electronically controlled silicone oil clutch water pump has been used for a certain period of time, it will be difficult to ensure the rotation accuracy of the active part and the driven part due to bearing problems, and the mechanical load friction coefficient between the two will be increased until it is stuck. During the operation of the electronically controlled silicone oil clutch water pump, the power output of the active part cannot be transmitted to the driven part due to the bearing sticking, the clutch cannot achieve the normal separation and coupling requirements, the water pump impeller cannot work normally, and the engine power consumption is also increased.

[0004] The technical feature of the electronically controlled silicone oil clutch water pump in the prior art is that the water pump is required to be assembled and formed at one time under the same processing environment. The so-called active part and the passive part do not exist separately, but all the individual parts are assembled into one. During the assembly process, the components are connected in a stacking-like manner, mainly by means of riveting. After the assembly of the active and passive parts is completed, it is impossible to achieve safe disassembly without damaging the active and passive parts, so the product scrap rate will be greatly increased.

[0005] The current split-type electronically controlled silicone oil clutch water pump is mainly aimed at reducing the engine fuel consumption efficiency and improving the separation and coupling performance of the electronically controlled silicone oil clutch water pump, and is undergoing continuous technical exploration and improvement.

[0006] With the advancement of the National V and National VI emission standards in China, and as major vehicle manufacturers continue to improve their fuel-saving emission standards, customers have placed higher requirements on the performance of the electronically controlled silicone oil clutch water pump. The structure of the split-type electronically controlled silicone oil clutch water pump determines that it has a long service life. How to better develop the fuel-saving effect on the electronically controlled engine system is an area that currently needs research and improvement.

[0007] The current electronically controlled silicone oil clutch water pump has certain disadvantages in terms of assembly method, product performance, cost and later maintenance. The reasons are as follows: 1. Assembly method: The stacked assembly method requires the electronically controlled silicone oil clutch water pump to be assembled in the same working environment, and fails to effectively and reasonably utilize the cooperation between manufacturers. For example, the clutch and water pump manufacturers can complete the assembly of their respective products separately before general assembly. The assembly process is cumbersome and the working hours are long; 2. Product performance: The active part and the driven part are connected by bearings. In the case of excessive bearing load and damage, the coupling and separation response time of the clutch will be greatly increased. The water pump drives the coolant to dissipate heat for the internal combustion engine, which is a heat exchange. The heat in the cylinder must be quickly transferred to the coolant. The specific heat capacity of the coolant is large. The coolant with different flow rates is crucial to the cooling performance of the internal combustion engine, reducing the preheating time and reducing harmful emissions during the startup phase. The clutch needs to respond quickly and have high consistency. If the clutch cannot be quickly separated and coupled, the impeller will not work properly; 3. Cost: In addition to increasing the assembly cost, the electronically controlled silicone oil clutch water pump with the current technical structure also has a cumbersome water pump structure. For example, the water pump structure described in the patent CN 110966078 B "Electronic Controlled Silicone Oil Clutch for Mechanical Water Pump of Internal Combustion Engine" requires bearings to support the rotation between the master and slave parts, which significantly increases the cost of components; 4. Post-maintenance: After the electronically controlled silicone oil clutch water pump is assembled, the components are tightly connected by riveting. If quality problems occur during product testing or installation, it will be difficult to disassemble and repair, which greatly increases the product scrap rate and also increases the cost of post-maintenance. Summary of the invention

[0008] Purpose of the invention: In order to solve the technical limitations of existing fan designs, a split-type electronically controlled silicone oil clutch water pump is provided, which aims to change the original stacked assembly method, reduce the risk of jamming between the active part and the driven part, optimize the separation and coupling response time, more accurately correct the impeller speed, better reduce engine fuel consumption and meet the requirements of the engine cooling system, and increase the life of cooling system components.

[0009] Technical solution: In order to achieve the above purpose, the present invention discloses a split type electronically controlled silicone oil clutch water pump, which is characterized in that it comprises: a clutch part and a water pump part coaxially installed together;

[0010] The clutch part includes: an exoskeleton oil seal, a driven plate and a clutch bearing which are radially installed on the driven shaft in sequence, a pulley which is pressed onto the radial outer side of the clutch bearing, a partition which is pressed onto the pulley, a valve plate assembly which is installed between the partition and the pulley, an upper cover which is installed with the partition by means of hexagon socket bolts and an oil outlet and return mechanism which is located between the upper cover of the pulley; by pressing the valve plate assembly in the oil storage chamber between the partition and the pulley, it is ensured that the valve plate assembly will not move up and down and cannot rotate around the axis.

[0011] The water pump part includes: a connector, a water pump body, a shaft-connected bearing, a speed measuring block, an impeller, a coil slot and a coil. One end of the shaft-connected bearing is inserted into the driven shaft, and the water pump body and the impeller are pressed in sequence on the radial outer side of the other end of the shaft-connected bearing. The coil slot with the coil inside is fixed on the water pump body. The speed measuring block is located between the water pump body and the shaft-connected bearing, and the connector is rotatably mounted on the water pump body.

[0012] As a further preferred embodiment of the present invention, the oil discharge and return mechanism includes: an oil storage chamber, an oil return port, an oil outlet, a driven plate tooth groove, an upper cover tooth groove and a working chamber, the oil storage chamber is located between the partition and the pulley, the upper cover, the driven plate and the partition form a working chamber, the oil return port and the oil outlet are arranged at the side wall of the partition, and the driven plate tooth groove on the driven plate is meshed and connected with the upper cover tooth groove on the upper cover.

[0013] As a further preferred embodiment of the present invention, when the oil return port is opened, the oil outlet is closed by the valve plate assembly, and when the oil return port is closed by the valve plate assembly, the oil outlet is opened.

[0014] As a further preferred embodiment of the present invention, after the oil outlet is opened and the oil return port is closed, the silicone oil in the oil storage chamber enters from the oil outlet, passes through the meshing portion of the driven plate tooth groove and the upper cover tooth groove and enters the working chamber; after the oil return port is opened and the oil outlet is closed, the meshing portion of the driven plate tooth groove and the upper cover tooth groove and the silicone oil as well as the silicone oil in the working chamber pass through the oil return channel and enter the oil storage chamber from the oil return port.

[0015] As a further preferred embodiment of the present invention, the oil storage chamber is a cavity surrounded by the inner wall of the pulley and the inner wall of the partition.

[0016] As a further preferred embodiment of the present invention, the upper cover, partition and pulley are pressed together and connected as a whole, and the pulley is connected to the engine gear train through a belt transmission to realize the rotation of the pulley and other active parts when the engine rotates, thereby driving the rotation of the water pump impeller.

[0017] As a further preferred embodiment of the present invention, the speed measuring block is connected to the engine ECU system, and the speed measuring block is a Hall sensor.

[0018] As a further preference of the present invention, the engine ECU system is connected to the electronic water pump clutch electronic control system, and the impeller speed is identified by the speed measuring block and fed back to the engine ECU system. The electronic water pump clutch electronic control system adjusts and controls the engine ECU system according to the data fed back by the engine ECU system, thereby realizing infinite speed buffering and achieving the purpose of saving energy.

[0019] As a further preferred embodiment of the present invention, the energization and de-energization of the coil are controlled by an electronic control system of an electronically controlled water pump clutch.

[0020] As a further preferred embodiment of the present invention, the pulley is connected to the engine gear train via a belt transmission.

[0021] Beneficial effects: Compared with the prior art, the split-type electronically controlled silicone oil clutch water pump of the present invention has the following advantages:

[0022] 1. The structure of the electronically controlled silicone oil clutch water pump is optimized, which reduces the risk of jamming between the active part and the driven part, and improves the clutch response ability;

[0023] 2. When the clutch is disengaged, the rotational resistance of the driven shaft increases compared with the prior art, which increases the slip rate between the active part and the driven part, allowing the silicone oil to be discharged from the meshing area faster, so that the transmission silicone oil between the active and driven parts is quickly reduced, and the driving force of the active part on the driven part is quickly reduced, so that the speed of the driven part of the silicone oil clutch can be quickly reduced, thereby extending the life of the water pump;

[0024] 3. After receiving the PMW pulse signal from the ECU, the electronic control system of the electronically controlled water pump clutch controls the on and off of the coil in the electronically controlled silicone oil clutch water pump to control the response time and speed of the clutch water pump, realize stepless speed buffering, improve the clutch speed control capability, and achieve the purpose of energy saving;

[0025] 4. As the rotational resistance on the driven shaft is reduced, the slip rate between the active part and the driven part is reduced, so that the silicone oil quickly enters the meshing area, greatly reducing the meshing response time;

[0026] 5. Clutch and water pump manufacturers can complete the assembly of their respective products separately before final assembly, which improves the assembly method and saves working hours;

[0027] 6. There is no need for bearings to support the rotation between the master and slave parts, which reduces the subsequent maintenance costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 is a full cross-sectional view of the present invention;

[0029] Figure 2 It is a structural diagram of the oil outlet and return mechanism;

[0030] Figure 3 This is a partial enlarged view of the oil outlet and oil return mechanism when the oil return port is opened;

[0031] Figure 4 It is a partial enlarged view of the oil outlet and return mechanism when the oil return port is closed. DETAILED DESCRIPTION

[0032] The present invention is further explained below in conjunction with the accompanying drawings and specific embodiments.

[0033] like Figure 1 As shown, the present invention is a split type electronically controlled silicone oil clutch water pump, wherein the clutch part is rigidly connected and fixed together with the shaft bearing 13 of the water pump part through the driven shaft 4.

[0034] The clutch part includes: an upper cover 1, a driven plate 2, an exoskeleton oil seal 3, a driven shaft 4, a clutch bearing 5, a partition 6, a valve plate assembly 7, a hexagon socket screw 8 and a pulley 9. The water pump part includes: a connector 11, a water pump body 12, a shaft-connecting bearing 13, a speed measuring block 14, an impeller 15, a coil slot 16 and a coil 17. The assembly of the split-type electronically controlled silicone oil clutch water pump is achieved by press-fitting the shaft-connecting bearing 13 onto the driven shaft 4.

[0035] Example

[0036] When the temperature of the engine rises or falls, the signal sent by the temperature sensor on the engine is collected by the automobile ECU, and the automobile ECU transmits the temperature signal to the electronic control system of the electronically controlled water pump clutch. According to the energization and attraction characteristics of the coil 17, the clutch electronic control system controls the coil 17 to energize to control the opening and closing action of the valve assembly 7. Figure 2 , Figure 3 As shown, when the oil outlet 20 is opened, the oil return port 19 is closed by the valve plate assembly 7. As the pulley 9 connected to the engine gear train rotates, the silicone oil in the oil storage chamber 18 enters from the oil outlet 20 by centrifugal force, passes through the meshing position of the driven plate tooth groove 21 and the upper cover tooth groove 22 and enters the working chamber 23. The driven plate tooth groove 21 and the upper cover tooth groove 22 interact with each other, and the driven plate 2 and the upper cover 1 are driven to rotate by the viscosity of the silicone oil. The clutch enters a coupling state, thereby driving the driven shaft 4 rigidly connected to the driven plate 2 to rotate, and the shaft bearing 13 connected to the impeller 15 drives the impeller 15 to rotate under the action of the driven shaft 4. At this time, the speed measuring block 14 installed between the water pump body 12 and the shaft bearing 13 detects the rotation speed of the water pump body 12 and sends a signal to the automobile ECU. The time required for the clutch to cool down the engine is calculated through the input PMW pulse signal of the ECU. When the time required for cooling the engine is up, the clutch electronic control system sends a power-off signal to the coil 17.

[0037] When the oil return port 19 is opened by the valve assembly 7, Figure 4 As shown, the oil outlet 20 is closed, and the silicone oil at the meshing point of the driven plate tooth groove 21 and the upper cover tooth groove 22 and the silicone oil in the working chamber 23 enter the oil storage chamber 18 from the oil return port 19 through the oil return channel 191, the driven plate 2 and the upper cover 1 gradually stop rotating, and the clutch gradually enters a separation state, thereby driving the driven shaft 4 rigidly connected to the driven plate 2 to gradually stop rotating. When the engine temperature rises again, the above actions can be repeated.

[0038] Compared with the existing electronically controlled silicone oil clutch water pump, the split-type electronically controlled silicone oil clutch water pump reduces the bearing connection between the two major components of the clutch and the water pump. When the clutch is engaged, the rotational resistance on the driven shaft 4 is reduced, so that the slip rate between the active component and the driven component is reduced, and the silicone oil quickly enters the meshing area, greatly reducing the meshing response time; when the clutch is disengaged, the rotational resistance of the driven shaft 4 is increased compared with the existing technology, so that the slip rate between the active component and the driven component is increased, so that the silicone oil can be discharged from the meshing area faster, and the transmission silicone oil between the active and driven components is rapidly reduced, so that the driving force of the active component on the driven component is rapidly reduced, so that the speed of the driven part of the silicone oil clutch can be rapidly reduced, thereby extending the life of the water pump.

Claims

1. A split type electronically controlled silicone oil clutch water pump, characterized in that: It includes: The clutch part and the water pump part are coaxially mounted together; The clutch part comprises: an outer skeleton oil seal (3), a driven plate (2) and a clutch bearing (5) radially mounted on a driven shaft (4) in sequence, a pulley (9) pressed on the radial outer side of the clutch bearing (5), a partition (6) pressed on the pulley (9), a valve plate assembly (7) mounted between the partition (6) and the pulley (9), an upper cover (1) mounted together with the partition (6), and an oil outlet and return mechanism located between the pulley (9) and the upper cover (1); The water pump part comprises: a connector (11), a water pump body (12), a shaft-connected bearing (13), a speed measuring block (14), an impeller (15), a coil slot (16) and a coil (17); one end of the shaft-connected bearing (13) is inserted into the driven shaft (4); the water pump body (12) and the impeller (15) are sequentially pressed on the radial outer side of the other end of the shaft-connected bearing (13); the coil slot (16) in which the coil (17) is arranged is fixed on the water pump body (12); the speed measuring block (14) is located between the water pump body (12) and the shaft-connected bearing (13); and the connector (11) is rotatably mounted on the water pump body (12); The oil discharge and return mechanism comprises: an oil storage chamber (18), an oil return port (19), an oil outlet (20), a driven disc tooth groove (21), an upper cover tooth groove (22) and a working chamber (23); the oil storage chamber (18) is located between the partition (6) and the pulley (9); the upper cover (1), the driven disc (2) and the partition (6) form the working chamber (23); the oil return port (19) and the oil outlet (20) are arranged on the side wall of the partition (6); the driven disc tooth groove (21) on the driven disc (2) is meshedly connected with the upper cover tooth groove (22) on the upper cover (1); the oil storage chamber (18) is a cavity surrounded by the inner wall of the pulley (9) and the inner wall of the partition (6); When the oil return port (19) is opened, the oil outlet port (20) is closed by the valve plate assembly (7); when the oil return port (19) is closed by the valve plate assembly (7), the oil outlet port (20) is opened.

2. A split type electronically controlled silicone oil clutch water pump according to claim 1, characterized in that: After the oil outlet (20) is opened and the oil return port (19) is closed, the silicone oil in the oil storage chamber (18) enters from the oil outlet (20), passes through the meshing portion of the driven plate tooth groove (21) and the upper cover tooth groove (22), and enters the working chamber (23); after the oil return port (19) is opened and the oil outlet (20) is closed, the meshing portion of the driven plate tooth groove (21) and the upper cover tooth groove (22) and the silicone oil as well as the silicone oil in the working chamber (23) pass through the oil return channel (191), and enter the oil storage chamber (18) from the oil return port (19).

3. The split type electronically controlled silicone oil clutch water pump according to claim 1 is characterized in that: The upper cover (1), the partition plate (6) and the pulley (9) are pressed together and connected as a whole.

4. The split type electronically controlled silicone oil clutch water pump according to claim 1 is characterized in that: The speed measuring block (14) is connected to the engine ECU system, and the speed measuring block (14) is a Hall sensor.

5. The split type electronically controlled silicone oil clutch water pump according to claim 4 is characterized in that: The engine ECU system is connected to the electronic control system of the electronically controlled water pump clutch.

6. The split type electronically controlled silicone oil clutch water pump according to claim 1 is characterized in that: The power on and off of the coil (17) is controlled by the electronic control system of the electronically controlled water pump clutch.

7. The split type electronically controlled silicone oil clutch water pump according to claim 1, characterized in that: The pulley (9) is connected to the engine gear train via a belt transmission.

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