CN111577604A - a series pump - Google Patents

Abstract

The invention provides a series pump which comprises a pump body, a first pump cover, blades, a rotor, a vacuum pump transmission shaft, a vacuum pump transmission gear, an oil pump driving wheel, a second pump cover, an oil pump transmission shaft, an oil pump driven wheel and an oil pump driven shaft, wherein the pump body is provided with a first pump cavity and a second pump cavity. Relevant parts of the oil pump are arranged in the first pump cavity and are sealed through the first pump cover, relevant parts of the vacuum pump are arranged in the second pump cavity and are sealed through the second pump cover, and therefore the oil pump and the vacuum pump are integrated on the same pump body, the weight of the whole engine can be reduced, the power consumption of the engine can be reduced, and meanwhile, machining and assembling procedures can be reduced.

Description

a series pump

technical field

The invention relates to the technical field of engine lubrication systems and vacuum pumps, in particular to a series pump.

Background technique

Automobile engines are generally equipped with oil pumps to provide oil pressure for the engine lubrication system. With the popularization of supercharged engines, GDI engines, diesel engines and other models, the use of vacuum pumps as the vacuum source for the braking system has also been widely used. The vacuum pump and the oil pump are generally equipped with their own driving forms, such as: the camshaft drives the vacuum pump through a coupling or a pulley, and the oil pump is driven by the crankshaft through gears, belt drives, etc.

At present, the mechanical vacuum pump matched with the engine is mostly designed with a single rotary vane or a double vane with an ellipse or a Pascal vortex cavity. However, if it is linked with the oil pump and meets the needs of the vacuum source when the commercial vehicle is braking, the PF is commonly used. Or PPS is the rotating vane, and the matching structure with PEEK as the sliding vane cannot meet the working conditions above 5000rpm (the maximum speed of the common mechanical vacuum pump is about 3000rpm), and the common failure form is the rapid wear or rupture of the rotating vane.

When the rotor, rotary vane and vane rotate at high speed, lubricating oil is required to provide lubrication and take away the heat generated by the friction between the rotary vane and the rotor, the sliding vane and the inner wall of the pump cavity. The channel is usually designed directly on the pump body to lead to the small head of the rotor and then flows into the pump cavity. The design control points are the oil pressure of the lubricating oil and the diameter of the lubricating oil passage. After the rotation speed exceeds 5000rpm, in order to meet the requirement that the lubricating oil can lubricate the rotor and blades in a timely and sufficient manner and take away the heat, a special lubricating oil path design is required.

SUMMARY OF THE INVENTION

The technical problem to be solved by the present invention is to provide a series pump, which can simultaneously supply oil for the engine lubricating system and provide a vacuum source for the braking system, thereby reducing the weight of the whole engine and reducing the power consumption of the engine.

In order to solve the above technical problems, the technical scheme of the present invention is: a series pump, comprising a pump body, a first pump cover, blades, a rotor, a vacuum pump transmission shaft, a vacuum pump transmission gear, an oil pump transmission gear, an oil pump driving wheel, a first Second pump cover, oil pump drive shaft, oil pump driven wheel, oil pump driven shaft; the pump body is provided with a first pump cavity and a second pump cavity, and the vanes and rotors are installed on the first pump through the vacuum pump drive shaft In the pump chamber, the inner end of the vacuum pump transmission shaft is rotatably installed in the blind hole at the bottom of the first pump chamber, and the outer end of the vacuum pump transmission shaft passes through the shaft hole of the first pump cover and is fixedly installed in the vacuum pump transmission gear. In the shaft hole, the first pump cover covers the first pump cavity and is fixed on the pump body by screws; the driving wheel of the oil pump is fixedly installed on the driving shaft of the oil pump, and the driven wheel of the oil pump is fixedly installed on the driven shaft of the oil pump , the inner ends of the oil pump driving shaft and the oil pump driven shaft are respectively rotatably installed in two blind holes at the bottom of the second pump cavity, and the outer end of the oil pump driving shaft passes through the shaft hole of the second pump cover It is fixedly installed in the shaft hole of the transmission gear of the oil pump, the outer end of the driven shaft of the oil pump is rotatably installed in the blind hole of the second pump cover, and the driving wheel of the oil pump and the driven wheel of the oil pump are in the second pump cavity. The second pump cover covers the second pump cavity and is fixed on the pump body by screws; the vacuum pump transmission gear and the oil pump transmission gear mesh with each other outside the pump body; the first pump cover is also provided with a valve hole, so A damping valve is installed in the valve hole. The damping valve includes a valve body, a rubber spring and a support ring. The tail of the valve body is inserted into the damping hole on the pump body. The lubricating oil channel is fitted; the damping valve is communicated with the inner section of the shaft hole of the first pump cover through a lubricating oil channel.

In the above technical solution, by integrating the oil pump and the vacuum pump on one pump body, the weight of the whole engine can be reduced, the power consumption of the engine can be reduced, and the processing and assembly procedures can be reduced. When in use, mesh the crankshaft end gear of the engine with the transmission gear of the oil pump. Since the driving wheel of the oil pump and the transmission gear of the oil pump are assembled coaxially, the transmission gear of the oil pump meshes with the transmission gear of the vacuum pump at the same time, so that the power can be transmitted to the vacuum pump at the same time. and oil pump. Since the damping valve and the lubricating oil passage are arranged on the first pump cover, the lubricating oil can flow into the end face and the center of the rotor through the lubricating oil passage on the first pump cover, and flow into the first pump cavity and the first pump cavity through the end face gap between the pump cover and the rotor. The blade groove lubricates the large end faces on both sides of the blade. After the lubricating oil flows into the bottom of the first pump cavity, the pressure can be stored on the lower end face of the rotor, thus solving the lubrication problem of the vacuum pump.

Further, the bottom of the first pump cavity is provided with an oil channel for allowing lubricating oil to enter the blind hole, so as to realize cooling and lubrication of the drive shaft of the vacuum pump.

Further, the two blind holes at the bottom of the second pump chamber communicate with the oil inlet through the oil passage. When the transmission gear of the oil pump rotates, the oil inlet of the oil pump generates negative pressure, the lubricating oil enters the second pump cavity, and at the same time enters the blind hole at the bottom to realize the lubrication and cooling of the main and driven shafts of the oil pump.

Description of drawings

1 is a schematic diagram of the overall structure of a series pump in an embodiment of the present invention;

2 is a schematic structural diagram of a damping valve in an embodiment of the present invention;

3 is a cross-sectional view of a first pump cover lubricating oil passage in an embodiment of the present invention;

4 is a sectional view of a shaft end of a vacuum pump drive shaft in an embodiment of the present invention;

Fig. 5 is the schematic diagram of the lubricating oil circuit of the vacuum pump in the embodiment of the present invention;

The reference numbers are:

1——Check valve 2——Pump body 3——Damp valve

3a——Valve body 3b——Rubber spring 3c——Support ring

4 - first pump cover 5 - vane 6 - rotor

7——Vacuum pump drive shaft 8——Vacuum pump drive gear

9——Oil pump transmission gear 10——Oil pump driving wheel

11——Second pump cover 12——Oil pump drive shaft

13——Oil pump driven wheel 14——Oil pump driven shaft

15 - Lubricating oil passage.

Detailed ways

In order to make the objectives, technical solutions and advantages of the invention more clear, the invention will be described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention, and not to limit the present invention.

In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", " The orientation or positional relationship indicated by "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc. is based on the orientation shown in the drawings Or the positional relationship is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

As shown in Figures 1 to 3, the preferred embodiment of the present invention is: a series pump, comprising a check valve 1, a pump body 2, a first pump cover 4, a vane 5, a rotor 6, a vacuum pump drive shaft 7, a vacuum pump drive Gear 8, oil pump transmission gear 9, oil pump driving wheel 10, second pump cover 11, oil pump transmission shaft 12, oil pump driven wheel 13, oil pump driven shaft 14; the pump body 2 is provided with a first pump cavity and the second pump chamber, the vane 5 and the rotor 6 are installed in the first pump chamber through the vacuum pump drive shaft 7, the inner end of the vacuum pump drive shaft 7 is rotatably installed in the blind hole at the bottom of the first pump chamber, the vacuum pump drive shaft 7 The outer end of the first pump cover 4 passes through the shaft hole of the first pump cover 4 and is fixedly installed in the shaft hole of the vacuum pump transmission gear 8. The first pump cover 4 covers the first pump cavity and is fixed on the pump body 2 by screws; The oil pump driving wheel 10 is fixedly installed on the oil pump driving shaft 12, the oil pump driven wheel 13 is fixedly installed on the oil pump driven shaft 14, and the inner ends of the oil pump driving shaft 12 and the oil pump driven shaft 14 are respectively rotatable. Installed in the two blind holes at the bottom of the second pump cavity, the outer end of the oil pump driving shaft 7 passes through the shaft hole of the second pump cover 11 and is fixedly installed in the shaft hole of the oil pump transmission gear 9. The outer end of the driven shaft 14 is rotatably installed in the blind hole of the second pump cover 11 , the oil pump driving wheel 10 and the oil pump driven wheel 13 are engaged with each other in the second pump cavity, and the second pump cover 11 covers The second pump chamber is fixed on the pump body 2 by screws; the vacuum pump transmission gear 8 and the oil pump transmission gear 9 mesh with each other outside the pump body; the first pump cover 4 is also provided with a valve hole in which a valve hole is installed. Damping valve 3, the damping valve 3 includes a valve body 3a, a rubber spring 3b, a support ring 3c, the tail of the valve body 3a is inserted into the damping hole on the pump body 2, and the rubber spring 3b is used to press-fit on the engine cylinder block, and The lubricating oil passages of the cylinder block fit together; the damping valve 3 is communicated with the inner section of the shaft hole of the first pump cover through a lubricating oil passage 15 .

When in use, mesh the engine crankshaft end gear with the oil pump transmission gear 9. Since the oil pump driving wheel 10 is coaxially assembled with the oil pump transmission gear 9, the oil pump transmission gear 9 meshes with the vacuum pump transmission gear 8 at the same time, so that the Power is transmitted to both the vacuum pump and the oil pump.

As shown in Figure 5, the lubricating oil flows into the end face and the center of the rotor through the lubricating oil channel 15 on the first pump cover 4 to realize the lubrication and cooling of the vacuum pump; The lubricating oil enters the oil passage of the blind hole to realize the cooling and lubrication of the drive shaft 7 of the vacuum pump.

As shown in Figure 1, the two blind holes at the bottom of the second pump chamber communicate with the oil inlet through the oil passage. When the oil pump transmission gear 9 rotates, the oil inlet of the oil pump generates negative pressure, and the lubricating oil enters the second pump chamber At the same time, it enters the blind hole at the bottom to realize the lubrication and cooling of the main and driven shafts of the oil pump.

The above-mentioned embodiment is a preferred implementation scheme of the present invention. In addition, the present invention can also be implemented in other ways, and any obvious replacement without departing from the concept of the technical solution is within the scope of the patent of the present invention.

In order to make it easier for those skilled in the art to understand the improvements of the present invention relative to the prior art, some drawings and descriptions of the present invention have been simplified, and for the sake of clarity, some other elements are also omitted in this application document, One of ordinary skill in the art would realize that these omitted elements may also constitute the subject matter of the present invention.

Claims (3)

1. An in-line pump characterized by: the pump comprises a pump body (2), a first pump cover (4), blades (5), a rotor (6), a vacuum pump transmission shaft (7), a vacuum pump transmission gear (8), an oil pump transmission gear (9), an oil pump driving wheel (10), a second pump cover (11), an oil pump transmission shaft (12), an oil pump driven wheel (13) and an oil pump driven shaft (14); the pump body (2) is provided with a first pump cavity and a second pump cavity, the blades (5) and the rotor (6) are installed in the first pump cavity through a vacuum pump transmission shaft (7), the inner side end of the vacuum pump transmission shaft (7) is rotatably installed in a blind hole in the bottom of the first pump cavity, the outer side end of the vacuum pump transmission shaft (7) penetrates out of a shaft hole of the first pump cover (4) and is fixedly installed in a shaft hole of a vacuum pump transmission gear (8), and the first pump cover (4) covers the first pump cavity and is fixed on the pump body (2) through screws; the oil pump driving wheel (10) is fixedly arranged on the oil pump driving shaft (12), the oil pump driven wheel (13) is fixedly arranged on the oil pump driven shaft (14), the inner side ends of the oil pump driving shaft (12) and the oil pump driven shaft (14) are respectively and rotatably arranged in two blind holes at the bottom of the second pump cavity, the outer side end of the oil pump driving shaft (12) penetrates out of the shaft hole of the second pump cover (11) and is fixedly arranged in the shaft hole of the oil pump transmission gear (9), the outer side end of the oil pump driven shaft (14) is rotatably arranged in the blind hole of the second pump cover (11), the oil pump driving wheel (10) and the oil pump driven wheel (13) are mutually meshed in the second pump cavity, and the second pump cover (11) covers the second pump cavity and is fixed on the; the vacuum pump transmission gear (8) and the oil pump transmission gear (9) are meshed with each other outside the pump body; the first pump cover (4) is further provided with a valve hole, a damping valve (3) is installed in the valve hole, the damping valve (3) comprises a valve body (3 a), a rubber spring (3 b) and a support ring (3 c), the tail part of the valve body (3 a) is inserted into the damping hole in the pump body (2), and the rubber spring (3 b) is used for being pressed on an engine cylinder body and is attached to a lubricating oil channel of the cylinder body; and the damping valve (3) is communicated with the inner section of the shaft hole of the first pump cover through a lubricating oil passage (15).

2. The tandem pump of claim 1 wherein: the bottom of the first pump cavity is provided with an oil passage which is convenient for lubricating oil to enter the blind hole, so that the vacuum pump transmission shaft (7) is cooled and lubricated.

3. The tandem pump according to claim 1 or 2, wherein: and the two blind holes at the bottom of the second pump cavity are communicated with the oil inlet through oil ducts.

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