阅读说明：本技术 一种集成式配流盘及微量泵 (Integrated valve plate and micropump ) 是由 车芳芳 冉益民 于 2020-12-07 设计创作，主要内容包括：本发明涉及一种集成式配流盘及微量泵,配流盘包括第一端面和第二端面,第一端面设有吸油区和压油区,吸油区和压油区设置在轴孔两侧,吸油区和压油区之间设有过渡区,配流盘侧面设有吸油窗,吸油窗与吸油区连通,所述第二端面设有出油口,出油口与压油区之间通过连接孔连通。本发明的一种集成式配流盘及微量泵能够提高配流盘的集成度,减小油液流动产生的冲击和噪音,能够降低微量泵的体积,减小震动,提升使用寿命。(The invention relates to an integrated valve plate and a micro pump, wherein the valve plate comprises a first end surface and a second end surface, the first end surface is provided with an oil suction area and an oil pressing area, the oil suction area and the oil pressing area are arranged on two sides of a shaft hole, a transition area is arranged between the oil suction area and the oil pressing area, the side surface of the valve plate is provided with an oil suction window, the oil suction window is communicated with the oil suction area, the second end surface is provided with an oil outlet, and the oil outlet is communicated with the oil pressing area through a connecting hole. The integrated valve plate and the micro pump can improve the integration level of the valve plate, reduce impact and noise generated by oil flow, reduce the volume of the micro pump, reduce vibration and prolong the service life.)

1. The integrated valve plate is characterized by comprising a first end face and a second end face, wherein the first end face is provided with an oil suction area and an oil pressing area, the oil suction area and the oil pressing area are arranged on two sides of a shaft hole, a transition area is arranged between the oil suction area and the oil pressing area, an oil suction window is arranged on the side face of the valve plate and communicated with the oil suction area, an oil outlet is arranged on the second end face, and the oil outlet is communicated with the oil pressing area through a connecting hole.

2. The integrated port plate of claim 1, wherein the first end surface is provided with damping grooves, and the damping grooves are respectively formed at the ends of the oil suction area and the oil pressing area.

3. The integrated port plate of claim 2, wherein there are two of the damping grooves, one damping groove communicating with the oil suction area and the other damping groove communicating with the oil compression area.

4. The integrated port plate of claim 1, wherein the first end surface is provided with an outer sealing strip and an inner sealing strip, the outer and inner sealing strips being located on either side of the oil suction zone and the oil compression zone.

5. The integrated port plate according to claim 1, wherein the first end surface edge is provided with a plurality of auxiliary support portions at intervals, and oil grooves are provided between adjacent auxiliary support portions.

6. The integrated port plate of claim 1, wherein the port plate is provided with a stopper groove so that the port plate can be coupled to the cylinder body by a screw to prevent the port plate from rotating radially.

7. A micropump comprising a drive shaft, a pump body, a port plate and a cylinder body, said drive shaft passing through the cylinder body and being connected to the port plate, characterized in that the port plate is an integrated port plate according to any one of claims 1 to 6, the oil suction area of the port plate communicating with the cylinder body.

8. The micropump of claim 7, wherein the pump body has a return disc, a return ball, a wave spring and a plunger, the plunger is disposed on the cylinder and connected to the return disc, the return ball is disposed on the return disc, and the wave spring is disposed between the cylinder and the return ball.

9. The micropump of claim 8, wherein the end of the pump body is provided with a gland, a first sealing ring is arranged between the gland and the port plate, and a second sealing ring is arranged between the port plate and the pump body.

10. The micropump of claim 9, wherein the pump body has an oil inlet, the gland has an oil pressure port, a deep groove ball bearing is disposed between the drive shaft and the pump body, and a rotary seal is disposed between the end of the pump body and the drive shaft.

Technical Field

The invention relates to a micro-displacement plunger pump, in particular to an integrated valve plate and a micro pump.

Background

The plunger pump is a common power driving element in the hydraulic industry, is widely applied to various industries such as aerospace, ships, marine equipment, mine metallurgy, energy sources and intelligent equipment, has large market demand and wide application range, but along with the increasing demands of increasingly lightening, intelligentizing and centralized control on the plunger pump by social fine division, artificial intelligence, small robots and the like, the traditional plunger pump can not meet the increasing market demand on the miniature plunger pump in various industries gradually. However, at present, the miniature plunger pump in domestic market is only provided with a foreign individual brand, and the miniature plunger pump with an independent brand is not put on the market.

With the increasing demand of micro integrated hydraulic systems, various robots and other working conditions requiring large output force, the demand of micro hydraulic plunger pumps is also called. The product is imported from foreign countries all the time, at present, the micro pump has large market demand in China, but is still in the research and development stage in China, so that the micro displacement plunger pump which is suitable for robots and intelligent equipment and has small volume and large output force is urgently needed to be developed so as to fill the blank in the field in China.

Disclosure of Invention

The invention aims to solve the problems in the prior art, and provides an integrated port plate and a micro pump which can reduce noise and volume, have large output force and have long service life.

The specific technical scheme is as follows: the integrated valve plate comprises a first end face and a second end face, wherein an oil suction area and an oil pressing area are arranged on the first end face and are arranged on two sides of a shaft hole, a transition area is arranged between the oil suction area and the oil pressing area, an oil suction window is arranged on the side face of the valve plate and is communicated with the oil suction area, an oil outlet is arranged on the second end face, and the oil outlet is communicated with the oil pressing area through a connecting hole.

Preferably, the first end face is provided with a damping groove, and the damping groove is respectively arranged at the end parts of the oil suction area and the oil pressing area.

Preferably, the number of the damping grooves is two, one damping groove is communicated with the oil absorption area, and the other damping groove is communicated with the oil pressing area.

Preferably, the first end face is provided with an outer sealing strip and an inner sealing strip, and the outer sealing strip and the inner sealing strip are positioned on two sides of the oil suction area and the oil pressing area.

As preferred scheme, first terminal surface edge is equipped with the auxiliary stay portion, and a plurality of auxiliary stay portions interval sets up, is equipped with between the adjacent auxiliary stay portion and leads to the oil groove.

As the preferred scheme, the valve plate is provided with a stop limit groove, so that the valve plate can be connected with the cylinder body through a screw to prevent the valve plate from rotating radially.

A micro pump comprises a transmission shaft, a pump body, a valve plate and a cylinder body, wherein the transmission shaft penetrates through the cylinder body and is connected with the valve plate.

Preferably, the pump body is provided with a return disc, a return ball, a wave spring and a plunger, the plunger is arranged on the cylinder body and is connected with the return disc, the return ball is arranged on the return disc, and the wave spring is arranged between the cylinder body and the return ball.

Preferably, a gland is arranged at the end part of the pump body, a first sealing ring is arranged between the gland and the valve plate, and a second sealing ring is arranged between the valve plate and the pump body.

According to the preferable scheme, the pump body is provided with an oil inlet, the gland is provided with an oil pressing opening, a deep groove ball bearing is arranged between the transmission shaft and the pump body, and a rotary seal is arranged between the end part of the pump body and the transmission shaft.

The invention has the technical effects that: the integrated valve plate and the micro pump can improve the integration level of the valve plate, reduce impact and noise generated by oil flow, reduce the volume of the micro pump, reduce vibration and prolong the service life.

Drawings

Fig. 1 is a perspective view of an integrated port plate according to an embodiment of the present invention.

Fig. 2 is a schematic diagram of an integrated port plate according to an embodiment of the present invention.

Fig. 3 is a schematic view of the invention in section C-C of fig. 2.

Fig. 4 is a side view of an integrated port plate according to an embodiment of the present invention.

Fig. 5 is a perspective view of an integrated port plate of an embodiment of the present invention.

Fig. 6 is a perspective view of a micropump in accordance with an embodiment of the present invention.

In the figure: 1-transmission shaft, 2-pump body, 3-swash plate, 4-return disc, 5-return ball, 6-wave spring, 7-plunger, 8-cylinder body, 9-valve plate, 10-gland, 11-first sealing ring, 12-first set screw, 13-punching outer ring needle roller bearing, 14-second sealing ring, 15-second set screw, 16-deep groove ball bearing, 17-rotary seal, 90-stop limit groove, 91-oil suction area, 92-oil pressing area, 93-shaft hole, 94-transition area, 95-oil suction window, 96-damping groove, 97-outer sealing belt, 98-inner sealing belt, 99-auxiliary support portion, 100-first end face, 101-oil through groove, 200-second day end face, 201-oil outlet, 202-connecting hole.

Detailed Description

The essential features and advantages of the invention will be further explained below with reference to examples, but the invention is not limited to the examples listed.

As shown in fig. 1 to 5, an integrated port plate 9 of the present embodiment includes a first end surface 100 and a second end surface 200, the first end surface 100 is provided with an oil suction area 91 and an oil pressing area 92, and the oil suction area 91 and the oil pressing area 92 are disposed on two sides of a shaft hole 93. A transition area 94 is arranged between the oil suction area 91 and the oil pressing area 92, an oil suction window 95 is arranged on the side face of the port plate, and the oil suction window 95 is communicated with the oil suction area 91. The second end face 20 is provided with an oil outlet 201, and the oil outlet 201 is communicated with the oil pressing area 92 through a connecting hole 202. In the above technical scheme, oil enters the oil suction area 91 through the oil suction window 95 of the port plate 9, the oil suction area 91 is communicated with the kidney-shaped groove at the bottom of the cylinder body 8 of the micropump, the plunger reciprocates in the cylinder body, the oil is extruded out through the operation of the central ripple spring and the return stroke mechanism, and enters the high pressure area through the transition area 94, so that the oil enters the oil pressing area 92 of the port plate 9 and flows to the oil outlet 201 through the connecting hole 202, the pump finishes oil output, and the connecting hole 202 of the embodiment is an inclined hole. Through the technical scheme, the valve plate can bear oil suction and pressing oil of the micro pump and axial load brought by the cylinder body rotating at high speed, and an integrated part integrating the oil suction port and the oil outlet is integrated.

In this embodiment, the first end surface 100 is provided with a damping groove 96, and the damping grooves 96 are respectively arranged at the ends of the oil suction area 91 and the oil pressing area 92. Through the technical scheme, the oil in the plunger cavity can be prevented from being instantly switched on from high pressure to low pressure or from low pressure to high pressure, and due to vibration and impact generated by sudden expansion or compression of the oil, the flow pulsation of the pump is seriously influenced by the high-low pressure alternative impact pressure, so that noise and periodic impact load are generated. The valve plate is designed with a transition area 94 and a damping groove 96, so that the pressure in the plunger cavity is in smooth transition, the impact is avoided, and the influence on the service life of the pump is reduced. In this embodiment, there are two damping grooves 96, one damping groove 96 is communicated with the oil suction area 91, and the other damping groove 96 is communicated with the oil pressing area 92.

In this embodiment, the first end face 100 is provided with an outer sealing belt 97 and an inner sealing belt 98, and the outer sealing belt 98 and the inner sealing belt 97 are located on two sides of the oil suction area 91 and the oil pressing area 92, so as to seal the oil suction area and the oil pressing area.

In this embodiment, the edge of the first end surface 100 is provided with the auxiliary supporting portions 99, the plurality of auxiliary supporting portions 99 are arranged at intervals, and the oil through groove 101 is provided between the adjacent auxiliary supporting portions 99. Therefore, the contact stress of the port plate is reduced as much as possible, liquid friction is kept between the cylinder body 8 and the port plate 9, the end face of the port plate 9 is provided with enough auxiliary supporting area, and an oil through groove 101 with unloading function is formed on a supporting surface formed by the auxiliary supporting portion. The valve plate is provided with a stop limit groove 90, so that the valve plate can be connected with the cylinder body through screws to prevent the valve plate from rotating radially, and the stop limit groove 90 is arranged on the side face of the valve plate.

A micro pump comprises a transmission shaft 1, a pump body 2, a valve plate 9 and a cylinder body 8, wherein the transmission shaft 1 penetrates through the cylinder body 8 and is connected with the valve plate 9. The port plate is the integrated port plate, and the oil absorption area 91 of the port plate 9 is communicated with the cylinder body 8. In this embodiment, the pump body 2 is provided with a return disc 4, a return ball 5, a wave spring 6 and a plunger 7, the plunger 7 is arranged on a cylinder 8 and connected with the return disc 4, the return ball 5 is arranged on the return disc 4, and the wave spring 6 is arranged between the cylinder 8 and the return ball 5. In this embodiment, a gland 10 is disposed at an end of the pump body 2, a first sealing ring 11 is disposed between the gland 10 and the port plate 9, and a second sealing ring 14 is disposed between the port plate 9 and the pump body 1. The pump body is provided with a first set screw 12 and a second set screw 15 which limit the valve plate 9 and the swash plate 3. In this embodiment, the pump body 2 is provided with an oil inlet 21, and the gland is provided with an oil pressure port 22. A deep groove ball bearing 16 is arranged between the transmission shaft 1 and the pump body 2, the deep groove ball bearing 16 is a micro deep groove ball bearing, a rotary seal 17 is arranged between the end part of the pump body 2 and the transmission shaft 1, and a drawn outer ring needle roller bearing 13 is arranged between the transmission shaft 1 and the valve plate.

The micro pump of this embodiment drives the cylinder 8 to rotate through the transmission shaft 1, so that the plungers 7 uniformly distributed on the cylinder 8 make reciprocating linear rotation in the plunger cavities. The end part of each plunger is provided with a slipper, the slipper is pressed on the swash plate 3 which has a certain inclination angle with the axis through the central wave spring 6, the return disc 4 and the return ball 5, the other end surface of the cylinder body 8 is pressed on the port plate 9, when the cylinder body 8 rotates, the plunger 7 does reciprocating motion, and the oil suction and the oil pressing action of the pump are completed through the oil suction area and the oil pressing area on the port plate 9.

The integrated valve plate and the micropump of the embodiment can improve the integration level of the valve plate, reduce the impact and noise generated by oil flow, reduce the volume of the micropump, reduce vibration and prolong the service life.

It should be noted that the above-mentioned preferred embodiments are merely illustrative of the technical concepts and features of the present invention, and are intended to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and not to limit the scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.