CN118008810A - Oil pressure changing device - Google Patents

Abstract

The invention provides an oil pressure changing device, which comprises a pressure changing device body connected with an installation body of an oil supply device and a driving component connected with the pressure changing device body and used for driving the pressure changing device body; the pressure changing device body comprises a pump body, an exhaust port and an oil supply pipeline, wherein the pump body is internally provided with a cavity and a rotor, the exhaust port is communicated with the cavity, and the oil supply pipeline is arranged in the pump body; the oil inlet of the oil supply pipeline is provided with a first one-way valve which is in one-way conduction when the rotor rotates, so that oil in the oil supply device enters the pressure changing device body through the first one-way valve; the exhaust port is provided with a second one-way valve or an exhaust duct. Through the mode, the oil borrowing pressure changing device provided by the invention can lubricate by oil in the oil supply device in the operation process, prevents the oil from entering when the operation is stopped, can be completely immersed in the oil supply device when in use, has wider application scene and can also play a better role in liquid cooling.

Description

Oil pressure changing device

Technical Field

The invention relates to the technical field of vacuum, in particular to an oil pressure changing device.

Background

The oil pressure changing device can be widely applied in the mechanical field, and the pressure changing device such as a vacuum pump power assisting system and an oil pump of a hydraulic power assisting steering system refers to equipment for pumping air and increasing pressure of a container with effective volume by using a mechanical, physical, chemical or physicochemical method. The pressure changing device is usually applied in the automotive field by connecting an internal combustion engine or an electric motor output shaft in series or in parallel with the pressure changing device, and the internal combustion engine or the electric motor output power is realized by connecting a generator and the pressure changing device in series or in parallel with a belt transmission shaft. Since the pressure changing device needs to be lubricated, the best mode is to use lubricating oil, and the oil supply mode is usually as follows: arranging a special oil pipeline, and supplying oil by an oil pool of the (pressurized) internal combustion engine or supplying oil by a relatively independent oil pot (with an oil way); or a relatively independent oilcan is attached to the pressure changing device which is connected with the output shaft of the motor in series or in parallel for supplying oil.

With the new energy electric vehicle canceling the internal combustion engine, the lubricating oil supply mode of the pressure changing device commonly adopts self-contained oilcan and oiling supply. The oil supply mode needs to change oil periodically, and needs to occupy corresponding space by an independent oil supply pipeline, an installation mechanism and corresponding parts. In order to simplify the oil supply mode and ensure normal oil supply, the patent publication No. CN110469656A provides an oil circulation device and method of a pressure changing device, and the pressure changing device is respectively arranged on a gearbox, a hydraulic steering device, a brake and other devices with oil so as to lubricate by using the lubricating oil of each device.

The pressure changing device provided in the patent can simplify the oil supply mode and ensure normal oil supply by adopting the technical means of oil borrowing of the existing oil supply pot and oil pool of the automobile, thereby greatly simplifying the process and reducing the cost. However, in the above-mentioned patent, if the pressure changing device is completely immersed in the lubricating oil during the actual application, the lubricating oil may enter the pressure changing device when the pressure changing device is not operated, and the excessive lubricating oil filled in the pressure changing device (vacuum pump) after the pressure changing device is turned on may seriously affect the normal operation of the pressure changing device.

In view of the foregoing, there is a need for an improved hydraulic pressure changing device.

Disclosure of Invention

In view of the above-mentioned drawbacks of the prior art, an object of the present invention is to provide a hydraulic pressure changing device, which is capable of properly feeding oil only when the pressure changing device is operating, and preventing the entry of lubricating oil when the pressure changing device is not operating, so as to avoid the influence of excessive lubricating oil on the operation of the pressure changing device.

In order to achieve the above object, the present invention provides an oil pressure changing device, comprising a pressure changing device body connected with a mounting body of an oil supply device, and a driving assembly connected with the pressure changing device body and used for driving the pressure changing device body; the pressure changing device body comprises a pump body, an exhaust port and an oil supply pipeline, wherein the pump body is internally provided with a cavity and a rotor, the exhaust port is communicated with the cavity, and the oil supply pipeline is arranged in the pump body; the oil inlet of the oil supply pipeline is provided with a first one-way valve which is in one-way conduction when the rotor rotates, so that oil in the oil supply device enters the pressure changing device body through the first one-way valve; the exhaust port is provided with a second one-way valve or an exhaust duct.

As a further improvement of the invention, the first one-way valve comprises a valve body connected with the oil inlet, and a cone-shaped structure in a horn shape is arranged in the oil inlet end of the valve body; the inner cavity of the valve body is provided with a spring, a sliding block connected with the spring and an oil inlet communicated with the oil inlet; the end of the sliding block is matched with the conical structure and is used for plugging the oil inlet end of the valve body, and when the rotor rotates, the sliding block compresses the spring to enable the oil inlet hole to be communicated with oil in the oil supply device.

As a further improvement of the invention, an oil guide pipe is communicated with the outside of the oil inlet end of the valve body, the oil inlet end of the oil guide pipe is communicated with oil in the oil supply device, and at least part of pipelines in the oil guide pipe are positioned at a cavity above the oil level in the oil supply device.

As a further improvement of the invention, the driving assembly comprises a motor, a rotating shaft of which is eccentrically arranged in the cavity and is connected with the rotor; a plurality of sliding grooves are formed in the rotor, and sliding sheets are connected in the sliding grooves in a sliding mode.

As a further improvement of the invention, a first passage is arranged in the rotating shaft along the axial direction, a first through hole and a second through hole which penetrate through the rotating shaft and are communicated with the first passage are respectively arranged on the rotating shaft along the radial direction, and the second through hole is communicated with the cavity; the outer wall of pivot is provided with circumference circular slot and helicla flute, the one end of helicla flute with circumference circular slot intercommunication, the other end with first through-hole intercommunication.

As a further improvement of the invention, the oil supply pipeline is communicated with the oil in the oil supply device and the circumferential circular groove, and the oil supply pipeline is communicated with the bin body of the motor.

As a further improvement of the present invention, the second check valve includes a valve plate disposed outside the exhaust port, a limiting piece disposed outside the valve plate, and a connecting piece for connecting one side of the valve plate and the limiting piece with the exhaust port.

As a further improvement of the invention, the air inlet end of the air exhaust pipe is communicated with the air exhaust port, and the air exhaust end is communicated with a cavity above the oil liquid level in the oil supply device.

As a further improvement of the invention, the pressure changing device body is connected with the mounting body through a mounting flange, and an integrated component is arranged outside the mounting flange.

As a further refinement of the invention, the integrated assembly comprises an integrated cartridge in communication with the cavity and an air inlet in communication with the integrated cartridge.

As a further improvement of the invention, the top of the integrated bin is provided with a cover plate, the inside of the integrated bin is provided with a filter screen and a third one-way valve, and the air inlet is provided with a sensor.

The beneficial effects of the invention are as follows:

1. According to the oil borrowing pressure changing device, the oil supply pipeline in the pressure changing device body is optimized, and the first one-way valve is arranged at the oil inlet of the oil supply pipeline, so that the first one-way valve is in one-way conduction when the rotor rotates, oil is fed only when the pressure changing device works, a good lubricating effect can be achieved, oil in the oil supply device cannot enter the pressure changing device when the pressure changing device does not work, and the influence caused by filling a large amount of oil in the pressure changing device when the pressure changing device does not work is effectively avoided. Based on the above, the oil borrowing pressure changing device provided by the invention can be completely immersed in oil of the oil supply device when in use, so that the application scene is wider, and a better liquid cooling effect can be achieved in the actual operation process.

2. According to the oil pressure changing device, the first one-way valve is arranged at the oil inlet, and the second one-way valve or the exhaust pipeline is arranged at the exhaust port. The second one-way valve is simple and convenient in setting mode, and oil in the oil supply device can be effectively prevented from entering the pressure changing device through the exhaust port. The arrangement of the exhaust pipeline can not only avoid oil from entering, but also can effectively realize oil-gas separation by utilizing the specific gravity difference of oil and gas by conveying the oil-gas mixture discharged by the pressure changing device to the cavity above the oil liquid level of the oil supply device.

3. According to the oil pressure changing device, through the integrated design outside the pressure changing device and the arrangement of the structures such as the filter screen, the one-way valve and the sensor in the integrated component, multiple functions can be realized by a small volume, the air inlet process of the pressure changing device is effectively simplified, the actual production and use cost is reduced, and the oil pressure changing device has high practical application value.

Drawings

Fig. 1 is a schematic structural diagram of the hydraulic pressure changing device according to the present invention at a first viewing angle.

Fig. 2 is a schematic structural diagram of the hydraulic pressure changing device according to the present invention at a second view angle.

Fig. 3 is a schematic structural diagram of the hydraulic pressure changing device according to the present invention at a third view angle.

FIG. 4 is a schematic view of the cross-sectional structure A-A of FIG. 3.

Fig. 5 is a schematic structural diagram of the pressure changing device body and the rotating shaft of the motor in the second view angle in the oil pressure changing device according to the present invention.

Fig. 6 is a schematic structural diagram of the body of the hydraulic pressure changing device and the shaft of the motor in a fourth view angle in the hydraulic pressure changing device according to the present invention.

FIG. 7 is a schematic view of the sectional B-B structure of FIG. 6.

Fig. 8 is a schematic structural diagram of a pump body in the hydraulic pressure changing device according to the present invention.

Fig. 9 is a schematic structural diagram of a first check valve in the hydraulic pressure changing device according to the present invention.

Fig. 10 is a schematic structural diagram of a second check valve in the hydraulic pressure changing device according to the present invention.

FIG. 11 is a schematic diagram of a spindle structure of the hydraulic pressure changing device according to the present invention.

Fig. 12 is a schematic view of a part of an integrated component in the hydraulic pressure changing device according to the present invention.

Fig. 13 is a schematic diagram of the oil supply device according to embodiment 1.

Fig. 14 is a schematic view of the oil supply device according to embodiment 2.

Fig. 15 is a schematic view of a part of the hydraulic pressure changing device according to embodiment 2.

Fig. 16 is a schematic view of the oil supply device according to embodiment 3.

Reference numerals

100. A hydraulic pressure changing device; 1. a pressure changing device body; 11. a pump body; 111. a cavity; 112. a rotor; 1121. a chute; 1122. a sliding sheet; 12. an exhaust port; 13. an oil supply line; 131. an oil inlet; 14. a first one-way valve; 141. a valve body; 142. a conical structure; 143. a spring; 144. a slide block; 145. an oil inlet hole; 15. a second one-way valve; 151. a valve plate; 152. a limiting piece; 153. a connecting piece; 161. a connecting pipe; 162. an exhaust pipe; 17. an oil guide pipe; 2. a motor; 21. a rotating shaft; 211. a first passage; 212. a first through hole; 213. a second through hole; 214. a circumferential circular groove; 215. a spiral groove; 22. a bin body; 3. an oil supply device; 31. a mounting body; 32. an oil level; 33. a cover body; 34. a fourth one-way valve; 4. a mounting flange; 5. an integrated component; 51. an integrated bin; 511. a cover plate; 512. a filter screen; 513. a third one-way valve; 521. a first air inlet; 522. a second air inlet; 523. a sensor.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in detail with reference to the accompanying drawings and specific embodiments.

It should be noted that, in order to avoid obscuring the present invention due to unnecessary details, only structures and/or processing steps closely related to aspects of the present invention are shown in the drawings, and other details not greatly related to the present invention are omitted.

In addition, it should be further noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

As shown in fig. 1 to 16, the present invention provides a hydraulic pressure changing device 100 including a pressure changing device body 1 connected to a mounting body 31 of an oil supplying device 3, and a driving assembly connected to the pressure changing device body 1 and for driving the pressure changing device body 1. Wherein the pressure changing device body 1 includes a pump body 11 having a cavity 111 and a rotor 112 provided therein, an exhaust port 12 communicating with the cavity 111, and an oil supply line 13 provided in the pump body 11; the oil inlet 131 of the oil supply line 13 is provided with a first non-return valve 14 and the exhaust port 12 is provided with a second non-return valve 15 or an exhaust line.

In the above manner, the first check valve 14 is turned on in one direction when the rotor 112 rotates, so that the oil in the oil supply device 3 enters the pressure changing device body 1 through the first check valve 14; when the rotor 112 is not rotated, the first check valve 14 is closed, and the oil in the oil supply device 3 does not enter the pressure changing device body 1. And, the setting of first check valve 14 can guarantee that fluid gets into the pump body along the single direction to directional flow to the position that needs the fuel feeding, improved fuel feeding efficiency and guaranteed the abundant lubrication to the pump body.

Meanwhile, the second one-way valve 15 or the exhaust pipeline can also prevent oil in the oil supply device 3 from entering the pressure changing device body 1 through the exhaust port 12. The exhaust pipe may be disposed inside or outside the oil supply device 3 or integrally designed with the oil supply device 3 according to needs, and may be capable of discharging the oil-gas mixture discharged from the exhaust port 12 into a cavity above the oil level of the oil supply device for oil-gas separation. Specifically, in some embodiments of the present invention, the exhaust pipe includes a connection pipe 161 and an exhaust pipe 162 communicating with the connection pipe 161; one end of the connection pipe 161 communicates with the exhaust port 162, and the other end passes through the installation body 31 to communicate with an intake end of the exhaust pipe 162 provided outside the oil supply device 3, and an exhaust end of the exhaust pipe 162 communicates with a cavity above the oil level 32 in the oil supply device 3.

More specifically, in some embodiments of the present invention, the oil supply device 3 includes, but is not limited to, a gearbox, a oilcan, etc., and the structure in which the oil is stored can be satisfied, which is not particularly limited by the present invention. In the drawings of the present invention, in order to facilitate the representation of the positional relationship between the structures provided inside and outside the oil feeding device 3 and the oil feeding device 3 in the oil pressure changing device 100, the installation body 31 represents the structure for installing the pressure changing device body 1 in the oil feeding device 3, and the installation body 31 may be a side wall of the oil feeding device 3 or other structure for facilitating the installation of the pressure changing device body 1, which is not particularly limited in the present invention. The pressure changing device body 1 may be provided inside or outside the oil supply device 3, and the oil in the oil supply device 3 may be communicated with the inside of the pressure changing device body 1 through a pipe.

The pressure changing device in the present invention may be a vacuum pump, a hydraulic power steering oil pump, or other similar pump. When the pressure changing device is a vacuum pump, the structure provided by the invention can prevent oil from entering the vacuum pump to influence the operation of the vacuum pump in a state that the vacuum pump is not operated, and the vacuum pump can be one of a rotary vane type vacuum pump, a sliding vane type vacuum pump, a vortex type vacuum pump and the like. When the pressure changing device is a hydraulic power-assisted steering oil pump, the main difference between the pressure changing device and the vacuum pump is that the vacuum pump compresses air and the hydraulic power-assisted steering oil pump pressurizes oil, a driving component corresponding to the hydraulic power-assisted steering oil pump needs to have relatively higher power than a driving component corresponding to the vacuum pump, and the cross section sizes of the hydraulic power-assisted steering oil pump and the vacuum pump are different. Because the hydraulic power-assisted steering oil pump can compress oil under the action of the higher-power driving component, the normal operation of the pump body cannot be influenced by the oil entering the pump body, but the hydraulic power-assisted steering oil pump still needs to borrow oil, and the oil borrowing mode and principle are basically consistent with those of the vacuum pump. Therefore, the specific structure and the oil borrowing principle of the vacuum pump are only described in the following by taking the vacuum pump as an example, and the specific contents of the hydraulic power steering oil pump are not repeated.

The hydraulic pressure changing device 100 according to the present invention will be described in detail with reference to specific embodiments.

Example 1

Referring to fig. 1-13, the present embodiment provides an oil pressure changing device 100, which includes a pressure changing device body 1 disposed inside an oil supply device 3 and connected to a mounting body 31 of the oil supply device 3, and a driving assembly connected to the pressure changing device body 1 and used for driving the pressure changing device body 1. In this embodiment, the pressure changing means is a vacuum pump. The pressure changing device body 1 includes a pump body 11 having a cavity 111 and a rotor 112 provided therein, an exhaust port 12 communicating with the cavity 111, and an oil supply line 13 provided in the pump body 11; the oil inlet 131 of the oil supply line 13 is provided with a first one-way valve 14 and the exhaust port 12 is provided with a second one-way valve 15.

In this embodiment, the drive assembly is a motor 2. A motor stator and a motor rotor are arranged in a bin body 22 of the motor 2, and the motor rotor is connected with a rotating shaft 21 of the motor 2. The shaft 21 is arranged eccentrically in the cavity 111, and its power take-off is connected to the rotor 112. So set up, when motor 2 works, the motor rotor drives pivot 21 to rotate under the drive of motor stator, and then utilizes pivot 21 to drive rotor 112 rotation.

Referring to fig. 4 and 11 in combination, in the present embodiment, a first passage 211 is axially disposed inside the rotating shaft 21, and a first through hole 212 and a second through hole 213 that penetrate the rotating shaft 21 and are in communication with the first passage 211 are respectively disposed on the rotating shaft 21 along the radial direction. Wherein, one end of the first passage 211 is communicated with the first through hole 212, the other end is communicated with the power output end of the rotating shaft 21, and the second through hole 213 is communicated with the cavity 111. A circumferential circular groove 214 and a spiral groove 215 are further provided on the outer wall of the rotating shaft 21, and one end of the spiral groove 215 communicates with the circumferential circular groove 214 and the other end communicates with the first through hole 212. In this embodiment, the oil supply pipeline 13 includes two passages that are vertically communicated with each other, and is used for communicating oil in the oil supply device 3 with the circumferential circular groove 214 and with the bin 22 of the motor 2.

Through the arrangement mode, oil entering the pump body 11 through the oil supply pipeline 13 can enter the bin body 22 to lubricate the inside of the motor 2, enter the spiral groove 215 through the circumferential circular groove 214, and then communicate with the first through hole 212 through the spiral groove 215, so that the oil enters the first passage 211 and enters the cavity 111 through the second through hole 213 to lubricate.

Referring to fig. 6 in combination, in the present embodiment, a plurality of sliding slots 1121 are disposed in the rotor 112, and sliding vanes 1122 are slidably connected to the sliding slots 1121. When the rotor 112 is driven to rotate by the eccentrically arranged rotating shaft 21, the sliding vane 1122 in the sliding groove 1121 moves outwards, so that the cavity formed by the sliding vane 1122 and the cavity 112 is enlarged, vacuum is formed in the cavity 111, and external air is sucked into the cavity 112 through the air inlet, and meanwhile, the first one-way valve 14 is conducted in one direction.

Referring to fig. 4 and 9 in combination, in the present embodiment, the first check valve includes a valve body 141 connected to the oil inlet 131, and a conical structure 142 with a horn shape and a large top and a small bottom is disposed inside an oil inlet end of the valve body 141; the inner cavity of the valve body 141 is provided with a spring 143, a slider 144 connected with the spring 143, and an oil inlet 145 communicated with the oil inlet 131. Wherein the ends of the slider 144 match the shape of the tapered structure 142. When the rotor 112 does not start to rotate, the resultant force formed by the downward acting force exerted by the spring 143 and the gravity of the slider 144 in the initial state is greater than the pressure of the oil in the oil supply device 3, so that the slider 144 in the initial state can block the oil inlet end of the valve body 141 to prevent the oil from entering. When the rotor 112 starts to rotate, the vacuum formed in the cavity 111 applies an upward force to the slider 144, causing the slider 144 to move upward and compress the spring 143, thereby causing the oil inlet 145 to communicate with the oil in the oil supply device 3, causing the oil to enter the pressure changing device body 1. When the rotor 112 stops rotating, the slider 144 resumes its original position, preventing oil from entering. By means of the arrangement, the oil pressure changing device 100 can achieve good lubrication effect only when the pressure changing device works, and prevents oil in the oil supply device from entering the pressure changing device when the pressure changing device does not work.

Referring to fig. 10 in combination, in the present embodiment, a second check valve 15 is provided at the exhaust port 12. The second check valve 15 includes a valve plate 151 disposed outside the exhaust port 12, a limiting piece 152 disposed outside the valve plate 151, and a connecting piece 153 for connecting one sides of the valve plate 151 and the limiting piece 152 with the exhaust port 12. So arranged, in the initial state, the valve plate 151 covers the surface of the exhaust port 12, preventing the oil in the oil supply device 3 from entering the cavity 111 through the exhaust port 12. When the pressure changing device starts to operate, the oil-gas mixture formed by the gas to be discharged and the oil liquid applies an outward acting force to the valve plate 151, so that the valve plate 151 rotates around the side provided with the connecting piece 153, and the oil-gas mixture is discharged. Meanwhile, the setting of the limiting piece 152 in the invention can limit the rotation amplitude of the valve plate 151, so as to avoid the problems that the valve plate 151 is difficult to recover and cannot be effectively closed after the rotation amplitude is too large.

In the present embodiment, the pressure changing device body 1 and the mounting body 31 are connected by the mounting flange 4, and the integrated component 5 is further provided outside the mounting flange 4. The integrated assembly 5 comprises an integrated cartridge 51 in communication with the cavity 111 and an air inlet in communication with the integrated cartridge 51, which in this embodiment comprises a first air inlet 521 and a second air inlet 522; the number of air inlets may be adjusted as desired in other embodiments of the invention. More specifically, in the present embodiment, the top of the integrated chamber 51 is provided with a cover plate 511, the inside of the integrated chamber 51 is provided with a filter screen 512 and a third check valve 513, and a sensor 523 is also provided in the first air inlet 521. The device can realize multiple functions of filtering, guiding, detecting and the like of the inlet gas with smaller volume, effectively simplifies the procedure of air inlet of the pressure changing device, reduces the actual production and use cost, and has higher practical application value.

Referring to fig. 13 in combination, in the practical application process, the oil pressure changing device 100 provided in the present embodiment can be fixedly installed on the oil supply device 3, and the pressure changing device body 1 can be completely immersed in the oil surface 32 of the oil supply device 3. The top of the oil supply device 3 is provided with a cover body 33, oil can be added into the oil supply device 3 by opening the cover body 33, a through hole communicated with the inside of the oil supply device is further formed in the cover body 33, and a fourth one-way valve 34 is arranged outside the through hole and used for enabling gas in the oil supply device 3 to be discharged in a one-way mode. The working process of the hydraulic pressure changing device 100 provided in this embodiment specifically includes the following:

When the pressure changing device is not started, the end part of the sliding block 144 in the first one-way valve 14 seals the conical structure 142 at the oil inlet end of the valve body 141, so that oil is prevented from entering the cavity of the pressure changing device when the pressure changing device is not operated, and the subsequent operation of the pressure changing device is influenced. When the motor 2 is turned on, the motor stator drives the motor rotor to drive the rotating shaft 21 to rotate, and then drives the rotor 112 to rotate, so that the sliding vane 1122 in the rotor 112 slides outwards along the sliding groove 1121, vacuum is formed in the cavity 111, external air enters the cavity 111 through the air inlet, and meanwhile, the sliding vane in the first one-way valve 14 moves upwards and compresses the spring 143, so that the oil inlet 145 is communicated with the oil in the oil supply device 3. The oil flows into the oil inlet 131 through the oil inlet 145, then enters the oil supply pipeline 13, respectively enters the bin body 22 of the motor 2 and the circumferential circular groove 214 on the surface of the rotating shaft through the oil supply pipeline 13, sequentially enters the spiral groove 215, the first through hole 212, the first passage 211 and the second through hole 213 through the circumferential circular groove 214, then enters the cavity 111 through the second through hole 213, forms an oil-gas mixture with air entering the cavity 111, and is discharged through the second one-way valve 15 at the exhaust port 12. The gas in the oil-gas mixture discharged through the second check valve 15 can float up to the oil surface 32 due to the small specific gravity and then be discharged through the fourth check valve 34. In this embodiment, the fourth check valve 34 is identical to the first check valve 14 in structure, and in other embodiments of the present invention, other types of fourth check valves 34 may be selected as needed to enable the gas in the oil supply device 3 to be discharged, which falls within the protection scope of the present invention.

Through the above manner, the oil borrowing pressure changing device 100 provided by the embodiment is only used for oil feeding when the pressure changing device works, and can be completely immersed in the oil of the oil supply device 3, so that good lubrication and liquid cooling effects are achieved, multiple functions can be integrated by a small volume, the effects of simplifying the working procedure, reducing the cost, expanding the application range and the like are achieved, and the practical application value is high.

Example 2

Referring to fig. 14-15, the present embodiment provides an oil pressure changing device 100, which is different from embodiment 1 only in that the way of providing the second check valve 15 at the exhaust port 12 in embodiment 1 is modified to provide an exhaust pipe at the exhaust port. The other structures and the action principle are the same as those of embodiment 1, and are not described in detail here.

In the present embodiment, the exhaust duct provided at the exhaust port 12 includes a connection pipe 161 and an exhaust pipe 162 communicating with the connection pipe 161. One end of the connection pipe 161 is communicated with the exhaust port 12, the other end of the connection pipe passes through the installation body 31 and is communicated with an air inlet end of an exhaust pipe 162 arranged outside the oil supply device 3, and an air outlet end of the exhaust pipe 162 is communicated with a cavity above the oil liquid level 32 in the oil supply device 3. In other embodiments of the present invention, the exhaust pipe and the oil supply device 3 may be provided as an integrated box, the air inlet end of the exhaust pipe is connected to the air outlet 12, and the air outlet end of the exhaust pipe is located above the oil level 32, which is also within the scope of the present invention.

Through the above mode, the exhaust end communicated with the exhaust port 12 is positioned at the cavity above the oil liquid surface 32, so that oil can be prevented from entering the cavity 111 through the exhaust port 12, and on the other hand, when the oil-gas mixture is discharged to the cavity above the oil liquid surface 32 through the exhaust pipeline, oil-gas separation can be effectively realized by utilizing the specific gravity difference of oil and gas. The separated gas can be discharged out of the oil supply device 3 through the fourth check valve 34. Also, in other embodiments of the present invention, when the volume of the cavity above the oil level 32 of the oil supply device 3 is large, the oil-gas mixture enters the large space from the small space, so that a better oil-gas separation effect can be achieved. Furthermore, the secondary oil-gas separation can be carried out by externally connecting an oil-gas separation device according to the requirement.

The manner of disposing the exhaust duct in this embodiment is not only simpler in structure but also has higher reliability than the manner of disposing the second check valve 15 in embodiment 1.

Example 3

Referring to fig. 16, the present embodiment provides an oil pressure changing device 100, which is different from embodiment 2 only in that an oil guiding pipe is further connected to the oil inlet end of the first check valve 14, and the rest of the structure and the function principle are the same as those of embodiment 1, and are not described herein.

In this embodiment, the oil inlet end of the valve body 141 is externally connected to the oil guide pipe 17, the oil inlet end of the oil guide pipe 17 is connected to the oil in the oil supply device 3, and a part of the pipeline in the middle of the oil guide pipe 17 is located in the cavity above the oil level 32 in the oil supply device 3. So set up, when pressure change device is not running, the inside fluid of oil feed device 3 just can't get into pressure change device inside through leading oil pipe 17, effectively avoided pressure change device when not working if first check valve 14 can't be effective closed because of long-term after the use and lead to a large amount of fluid to fill the influence that causes in pressure change device.

Furthermore, although the oil guide pipe 17 provided in the present embodiment can prevent oil from entering the inside of the pressure changing device when the pressure changing device is not operating, the provision of the first check valve 14 is still necessary. If the first check valve 14 is not provided, the oil may reciprocate, so that a part of the oil may not flow to the design site in a directional manner, which affects the adequate lubrication of the pressure changing device.

In summary, the present invention provides a hydraulic pressure changing device 100, which includes a pressure changing device body 1 connected to a mounting body 31 of an oil supply device 3, and a driving component connected to the pressure changing device body 1 and used for driving the pressure changing device body 1; the pressure changing device body 1 includes a pump body 11 having a cavity 111 and a rotor 112 provided therein, an exhaust port 12 communicating with the cavity 111, and an oil supply line 13 provided in the pump body 11; the oil inlet 131 of the oil supply pipeline 13 is provided with a first one-way valve 14, and the first one-way valve 14 is in one-way conduction when the rotor 112 rotates, so that oil in the oil supply device 3 enters the pressure changing device body 1 through the first one-way valve 14; the exhaust port 12 is provided with a second one-way valve 14 or an exhaust conduit. Through the mode, the oil borrowing pressure changing device 100 provided by the invention can lubricate by oil in the oil supply device 3 in the operation process, prevents the oil from entering when the operation is stopped, can be completely immersed in the oil supply device 3 in the use process, has wider application scenes and can play a better role in liquid cooling.

The above embodiments are only for illustrating the technical solution of the present invention and not for limiting the same, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications and equivalents may be made thereto without departing from the spirit and scope of the technical solution of the present invention.

Claims (10)

1. An oil pressure changing device is characterized in that: the device comprises a pressure changing device body connected with an installation body of the oil supply device and a driving component connected with the pressure changing device body and used for driving the pressure changing device body; the pressure changing device body comprises a pump body, an exhaust port and an oil supply pipeline, wherein the pump body is internally provided with a cavity and a rotor, the exhaust port is communicated with the cavity, and the oil supply pipeline is arranged in the pump body; the oil inlet of the oil supply pipeline is provided with a first one-way valve which is in one-way conduction when the rotor rotates, so that oil in the oil supply device enters the pressure changing device body through the first one-way valve; the exhaust port is provided with a second one-way valve or an exhaust duct.

2. The oil pressure changing device according to claim 1, wherein: the first one-way valve comprises a valve body connected with the oil inlet, and a cone-shaped structure in a horn shape is arranged in the oil inlet end of the valve body; the inner cavity of the valve body is provided with a spring, a sliding block connected with the spring and an oil inlet communicated with the oil inlet; the end of the sliding block is matched with the conical structure and is used for plugging the oil inlet end of the valve body, and when the rotor rotates, the sliding block compresses the spring to enable the oil inlet hole to be communicated with oil in the oil supply device.

3. The oil pressure changing device according to claim 1, wherein: the driving assembly comprises a motor, a rotating shaft of the motor is eccentrically arranged in the cavity, and the rotating shaft is connected with the rotor; a plurality of sliding grooves are formed in the rotor, and sliding sheets are connected in the sliding grooves in a sliding mode.

4. A hydraulic pressure changing device according to claim 3, wherein: a first passage is axially arranged in the rotating shaft, a first through hole and a second through hole which penetrate through the rotating shaft and are communicated with the first passage are respectively arranged on the rotating shaft along the radial direction, and the second through hole is communicated with the cavity; the outer wall of pivot is provided with circumference circular slot and helicla flute, the one end of helicla flute with circumference circular slot intercommunication, the other end with first through-hole intercommunication.

5. The oil pressure changing device according to claim 4, wherein: the oil supply pipeline is communicated with oil in the oil supply device and the circumferential circular groove, and the oil supply pipeline is communicated with the bin body of the motor.

6. The oil pressure changing device according to claim 1, wherein: the second one-way valve comprises a valve plate arranged outside the exhaust port, a limiting piece arranged outside the valve plate, and a connecting piece used for connecting one side of the valve plate and the limiting piece with the exhaust port.

7. The oil pressure changing device according to claim 1, wherein: and the air inlet end of the air exhaust pipeline is communicated with the air exhaust port, and the air exhaust end of the air exhaust pipeline is communicated with a cavity above the oil liquid level in the oil supply device.

8. The oil pressure changing device according to claim 1, wherein: the pressure changing device body is connected with the mounting body through a mounting flange, and an integrated assembly is arranged on the outer side of the mounting flange.

9. The oil pressure changing device according to claim 8, wherein: the integrated assembly includes an integrated cartridge in communication with the cavity and an air inlet in communication with the integrated cartridge.

10. The oil pressure changing device according to claim 9, wherein: the top of integrated storehouse is provided with the apron, the inside of integrated storehouse is provided with filter screen and third check valve, be provided with the sensor in the air inlet.