WO2022000289A1

WO2022000289A1 - Rotor pump having pressure relief protection function

Info

Publication number: WO2022000289A1
Application number: PCT/CN2020/099359
Authority: WO
Inventors: 黄萧; 陈跃邦; 徐军中; 李传金
Original assignee: 江苏金湖输油泵有限公司
Priority date: 2020-06-30
Filing date: 2020-06-30
Publication date: 2022-01-06

Abstract

A rotor pump having a pressure relief protection function. The rotor pump comprises a rotor pump body (1), a support base (2) for supporting the rotor pump, an oil intake end pressure relief mechanism used for releasing pressure of an oil intake end of the rotor pump, and an oil output end pressure relief mechanism (4) used for releasing instantaneous pressure transferred to an oil output end of the rotor pump. The bottom of the rotor pump body (1) is fixedly connected to the support base (2), and the bottom of the support base (2) is fixedly connected to an anti-slip shock-absorbing pad (5). The present invention relates to the field of rotor pumps. In the rotor pump having a pressure relief protection function, according to the pressure conditions present in the oil intake end and the oil output end of existing rotor pumps, a structure is designed to continuously reduce pressure at the oil intake end and instantaneously reduce pressure at the oil output end, and various oil flow pressures are efficiently and safely released, thereby effectively solving the problem whereby oil intake ends and oil output ends of normal rotor pumps may all experience abnormal pressures, and thus rigid connecting pipelines and even components inside a pump body are all prone to frequent damage during use due to the influence of being subjected to the factors of pressure of the components inside the pump body and external pressure.

Description

Rotor Pump with Pressure Relief Protection

technical field

The invention relates to the technical field of rotor pumps, in particular to a rotor pump with a pressure relief protection function.

Background technique

The rotor pump is also called a three-blade pump. It achieves the purpose of conveying fluid by means of the periodic transformation of multiple fixed volume delivery units in the working chamber. The rotor pump can be used to transport oil, and the oil delivery of the rotor pump The oil end and the oil outlet end are connected with the inner cavity of the pump body. During the oil delivery process, the oil inlet end and the oil outlet end of the rotor pump may face different pressure conditions, and the instantaneous oil stop at the oil inlet end will not cause too much damage However, if the partial pressure cannot be obtained or the partial pressure is interrupted in the upstream, the pressure at the inlet end of the rotor pump will gradually increase, and the increase in the pressure of the existing rotor pump mainly acts on the core equipment and the connecting pipe in the pump. , At present, a pressure relief valve will be set on the pipeline. When the pressure is too large, the pressure relief valve will be opened directly to relieve the pressure, but the rigid pressure test, in the process of continuous pressure change, frequently starts and closes, and the pressure increases frequently The impact will damage the components of the pump body, and when the pressure at the oil outlet is blocked, the internal components of the pump body will be directly affected by the instantaneous impact pressure. The direction of the change of the internal impeller and the direction of the oil flow pressure inside the connecting pipe are also different. In the commonly used pressure relief valve, because the pipe direction is unique, if the pressure direction is opposite to the direction of the pressure relief pipe, the connecting pipe may be damaged. , the oil inlet and outlet of the general rotor pump may face very high pressure, affected by the internal components of the pump body and the causes of external pressure, the rigid connecting pipes and even the internal components of the pump body are prone to frequent damage during use, so it is necessary to A rotary lobe pump with pressure relief protection.

SUMMARY OF THE INVENTION

(1) Technical problems solved

In view of the deficiencies of the prior art, the present invention provides a rotary lobe pump with a pressure relief protection function, which solves the problem that the oil inlet and outlet ends of the general rotary lobe pump may face extreme pressure and are caused by the internal components of the pump body and external pressure. Influence, rigid connecting pipes and even the internal parts of the pump body are prone to frequent damage during use.

(2) Technical solutions

In order to achieve the above purpose, the present invention is achieved through the following technical solutions: a rotor pump with a pressure relief protection function and a rotor pump with a pressure relief protection function, comprising a rotor pump pump body, a support seat for supporting the rotor pump, and a rotor pump for supporting the rotor pump. The oil inlet pressure relief mechanism for releasing the pressure at the oil inlet end of the rotor pump and the oil outlet pressure relief mechanism for releasing the instantaneous pressure transmitted from the oil outlet end of the rotor pump, the bottom of the rotor pump body is fixedly connected with a support The bottom of the support seat is fixedly connected with a non-slip shock-absorbing pad, the oil inlet end and the oil outlet end of the rotor pump body are fixedly connected with a first connecting flange, and the oil inlet end pressure relief mechanism is arranged at At the oil inlet end of the rotor pump body, the pressure relief mechanism at the oil outlet end is arranged at the oil outlet end of the rotor pump body.

Preferably, the pressure relief mechanism at the oil inlet includes an oil inlet connection pipe, a bypass pressure relief pipe and an oil inlet lining pipe, and one end of the oil inlet connection pipe passes through the first pipe at the oil inlet. The connecting flange is connected to the oil inlet end of the rotor pump body, the oil inlet end lining pipe is sleeved inside the oil inlet end connection pipe, and one end of the bypass pressure relief pipe penetrates the oil inlet end connection pipe and the oil inlet end liner pipe and extend to the inside of the oil inlet end liner pipe, and one end of the bypass pressure relief pipe located inside the oil inlet end liner pipe is flush with the inner wall of the oil inlet end liner pipe.

Preferably, one end of the lining pipe at the oil inlet is communicated with an external oil pipe, an oil inlet and pressure relief cavity is provided between the surface of the lining pipe at the oil inlet and the inner wall of the connecting pipe at the oil inlet, The material of the oil end lining pipe includes rubber, the inner wall of the oil inlet and pressure relief chamber is fixedly connected with a number of conductive rods distributed in a circle, and the surface of each of the conductive rods is fixedly connected with two conductive rods. The center line is an arc-shaped elastic contact piece whose center line is symmetrically distributed, an insulating layer is arranged inside the connection pipe of the oil inlet, and the surface of the arc-shaped elastic contact piece is slidably connected with the inner wall of the insulating layer. The inner wall of the insulating layer is fixedly connected with a plurality of vertical buffer springs corresponding to the conductive rods one-to-one, and one end of the vertical buffer springs is fixedly connected with the surface of the conductive rods.

Preferably, an electromagnetic pressure relief valve at the oil inlet end is fixedly connected to the inner wall of the bypass pressure relief pipe, the material of the bypass pressure relief pipe is an insulating material, and two arcs near the bypass pressure relief pipe are located The elastic contact pieces are connected to the external power supply and the electromagnetic pressure relief valve at the oil inlet end respectively through wires.

Preferably, the oil outlet pressure relief mechanism includes an oil outlet connection pipe, a plurality of movable pressure relief pipes and an oil outlet lining pipe, one end of the oil outlet lining pipe is communicated with an external oil pipe, and the One end of the connection pipe at the oil outlet is connected to the oil outlet of the rotor pump body through the first connection flange at the oil outlet, and the liner pipe at the oil outlet is sleeved inside the connection pipe at the oil inlet. The surface of the oil outlet connection pipe is provided with a number of movable ports corresponding to the movable pressure relief pipes one-to-one, and one end of the several movable pressure relief pipes passes through the oil outlet connection pipe and the oil outlet through the movable ports. The end liner pipe extends to the inside of the oil outlet end liner pipe. One end of the oil outlet end liner pipe located inside the oil outlet end liner pipe is flush with the inner wall of the oil outlet end liner pipe. The surfaces of the liner pipes at the oil outlet end are all inclined, and a plurality of the liner pipes at the oil outlet end are distributed equidistantly and circumferentially on the surface of the connecting pipe at the oil outlet end, and the surfaces of the movable pressure relief pipes are fixed and connected elastically. A rubber tube, the surface of the elastic rubber tube is fixedly connected with the inner wall of the movable port.

Preferably, an oil resistance and pressure relief cavity is provided between the surface of the oil outlet liner and the inner wall of the oil outlet connection pipe, and the surface of the oil outlet liner is fixedly connected with several equidistant cavities. Circumferentially distributed movable buffer rods, the inner wall of the oil outlet connection pipe is fixedly connected with a number of fixed buffer rods corresponding to the movable buffer rods one-to-one, and a pair of adjacent movable pressure relief pipes are provided with one A movable buffer rod and a fixed buffer rod, an inclined point buffer rod is fixedly connected at the connection between the movable pressure relief pipe and the oil outlet liner pipe, and the surface of the inclined point buffer rod and the surface of the movable buffer rod are fixedly connected There is an internal pressure buffer spring, one end of the internal pressure buffer spring is fixedly connected with the surface of the fixed buffer rod, and the inclined point buffer rods between the adjacent two movable pressure relief pipes and the fixed buffer rod are distributed in an equal triangle.

Preferably, an electromagnetic pressure relief valve at the oil outlet end is fixedly installed on the inner wall of each of the movable pressure relief pipes, and an electromagnetic pressure relief valve at the oil inlet end is fixedly installed on the surface of each of the fixed buffer rods. The corresponding travel switch, the output end of the travel switch is electrically connected with the input end of the electromagnetic pressure relief valve at the oil inlet end, and the travel switch is sleeved inside the inner pressure buffer spring between the fixed buffer rod and the interactive buffer rod, A second connection flange is fixedly connected to the surface of the connection pipe at the oil inlet end and the surface of the connection pipe at the oil outlet end.

(3) Beneficial effects

(1) The present invention can continuously expand the inner diameter of the connection pipe at the oil inlet end by setting the pressure relief mechanism at the oil inlet end when the duck stay at the oil inlet end increases gradually, and the elastic structure inside the connection pipe offsets most of the pipeline. It also provides buffer time for the opening and stopping of the shunt pressure relief pipeline, avoiding frequent opening and closing of the valve, pressure release and switching too fast, which will cause the internal structure of the pump body and the pipeline to be damaged due to greater impact. produce.

(2) In the present invention, by setting the pressure relief mechanism at the oil outlet, the instantaneous resistance generated by the oil outlet can be buffered and absorbed, so as to avoid the damage to the pump body caused by the instantaneous recoil force, and the partial pressure is set in the circumferential direction. The pipeline at the position where the pressure is relatively high is controlled by the travel switch to pass the oil first, and the pressure is quickly released to avoid damage to the pipeline.

(3) In the present invention, the local pressure can be fully buffered and evenly transmitted by setting the internal pressure buffer spring, the oblique buffer rod, the fixed buffer rod and the movable buffer rod. The fixed buffer rod and the movable buffer rod can fully transmit and release the internal pressure of the connecting pipe, which greatly relieves the pressure of the pipeline.

(4) The present invention designs a special structure of continuous decompression at the inlet end and instantaneous decompression at the outlet end according to the existing pressure conditions at the inlet and outlet ends of the rotor pump, so as to efficiently and safely release various oil flow pressures, thereby effectively It solves the problem that the oil inlet and outlet ends of the general rotor pump may face very high pressure. Affected by the internal components of the pump body and the causes of external pressure, the rigid connecting pipes and even the internal components of the pump body are prone to frequent damage during use. problem.

Description of drawings

Fig. 1 is the structural representation of the present invention;

Fig. 2 is the sectional view of the oil inlet end connecting pipe structure of the present invention;

3 is a cross-sectional view of the structure of the connecting pipe at the oil outlet of the present invention;

FIG. 4 is an enlarged view of the structure at A in FIG. 3 of the present invention.

Among them, 1 rotor pump body, 2 support base, 3 oil inlet pressure relief mechanism, 31 oil inlet connection pipe, 32 bypass pressure relief pipe, 33 oil inlet lining pipe, 34 oil inlet pressure relief chamber, 35 conductive rod, 36 arc-shaped elastic contact piece, 37 insulating layer, 38 oil inlet electromagnetic pressure relief valve, 39 vertical buffer spring, 4 oil outlet pressure relief mechanism, 41 oil outlet connection pipe, 42 movable pressure relief Tube, 43 Oil outlet lining tube, 44 Active port, 45 Elastic rubber tube, 46 Oil resistance and pressure relief cavity, 47 Active buffer rod, 48 Fixed buffer rod, 49 Inclined buffer rod, 410 Internal pressure buffer spring, 411 Outlet Oil end electromagnetic pressure relief valve, 412 travel switch, 413 second connecting flange, 5 anti-skid shock pad, 6 first connecting flange.

detailed description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

As shown in Figures 1-4, an embodiment of the present invention provides a rotary lobe pump with a pressure relief protection function, including a rotary lobe pump body 1, a support seat 2 for supporting the rotary lobe pump, and a rotary lobe pump for removing the oil inlet end The pressure relief mechanism 3 at the oil inlet end and the oil outlet pressure relief mechanism 4 for removing the instantaneous pressure transmitted from the oil outlet end of the rotor pump. The bottom of the rotor pump body 1 is fixedly connected with a support seat 2, and the support seat 2 The bottom of the rotor pump is fixedly connected with a non-slip shock-absorbing pad 5 , the oil inlet end and the oil outlet end of the rotor pump body 1 are fixedly connected with a first connecting flange 6 , and the oil inlet pressure relief mechanism 3 is arranged on the rotor pump body 1 . At the oil inlet end, the oil outlet end pressure relief mechanism 4 is arranged at the oil outlet end of the rotor pump body 1 .

The oil inlet pressure relief mechanism 3 includes an oil inlet connection pipe 31, a bypass pressure relief pipe 32 and an oil inlet lining pipe 33. One end of the oil inlet connection pipe 31 is connected by the first connection method at the oil inlet end. The flange 6 is connected to the oil inlet end of the rotor pump body 1, the oil inlet end lining pipe 33 is sleeved inside the oil inlet end connection pipe 31, and one end of the bypass pressure relief pipe 32 penetrates the oil inlet end connection pipe 31 and the oil inlet liner 33 and extend to the inside of the oil inlet liner 33 , and one end of the bypass pressure relief pipe 32 located inside the oil inlet liner 33 is flush with the inner wall of the oil inlet liner 33 , one end of the oil inlet end liner pipe 33 is connected with the external oil pipe, an oil inlet pressure relief cavity 34 is provided between the surface of the oil inlet end liner pipe 33 and the inner wall of the oil inlet end connecting pipe 31, and the oil inlet end is lined with The material of the pipe 33 includes rubber, the inner wall of the oil inlet and pressure relief chamber 34 is fixedly connected with a number of conductive rods 35 distributed in a circle, and the surface of each conductive rod 35 is fixedly connected with two conductive rods 35. The lines are symmetrically distributed arc-shaped elastic contact pieces 36, an insulating layer 37 is provided inside the oil inlet end connection pipe 31, and the surface of the arc-shaped elastic contact pieces 36 is slidingly connected with the inner wall of the insulating layer 37. The inner wall is fixedly connected with a number of vertical buffer springs 39 corresponding to the conductive rods 35 one-to-one. One end of the vertical buffer springs 39 is fixedly connected to the surface of the conductive rod 35, and the inner wall of the bypass pressure relief pipe 32 is fixedly connected with the oil inlet end electromagnetic leakage. Pressure valve 38, the material of the bypass pressure relief pipe 32 is insulating material, and the two arc-shaped elastic contact pieces 36 near the bypass pressure relief pipe 32 are connected to the external power supply and the electromagnetic pressure relief valve 38 at the oil inlet end respectively through wires. connect.

The oil outlet pressure relief mechanism 4 includes an oil outlet connection pipe 41, a plurality of movable pressure relief pipes 42 and an oil outlet lining pipe 43. One end of the oil outlet lining pipe 43 is communicated with an external oil pipe, and the oil outlet is connected to the oil outlet. One end of the through pipe 41 is connected to the oil outlet end of the rotor pump body 1 through the first connecting flange 6 at the oil outlet end, and the oil outlet end lining pipe 43 is sleeved inside the oil inlet end connection pipe 31, The surface of the oil end connection pipe 41 is provided with a number of movable ports 44 corresponding to the movable pressure relief pipes 42 one-to-one. The oil end liner 43 extends to the inside of the oil outlet liner 43, and the end of the oil outlet liner 43 inside the oil outlet liner 43 is flush with the inner wall of the oil outlet liner 43, The surfaces of the several oil outlet end liner pipes 43 are all inclined, and the surfaces of the several oil outlet end liner pipes 43 are equidistant and circumferentially distributed on the surface of the oil outlet end connection pipe 41, and the surfaces of the movable pressure relief pipes 42 are fixedly connected. There is an elastic rubber tube 45, the surface of the elastic rubber tube 45 is fixedly connected with the inner wall of the movable port 44, and an oil resistance and pressure relief cavity 46 is provided between the surface of the oil outlet end liner tube 43 and the inner wall of the oil outlet end connection tube 41 , the surface of the lining pipe 43 at the oil outlet is fixedly connected with a number of movable buffer rods 47 distributed in an equidistant circle, and the inner wall of the connection pipe 41 at the oil outlet is fixedly connected with a number of fixed buffer rods 47 corresponding to each other. Buffer rod 48, a movable buffer rod 47 and a fixed buffer rod 48 are provided between two adjacent movable pressure relief pipes 42, and the connection between the movable pressure relief pipe 42 and the oil outlet end liner pipe 43 is fixedly connected with an inclined plane. The surface of the point buffer rod 49, the surface of the inclined point buffer rod 49 and the surface of the movable buffer rod 47 are all fixedly connected with an internal pressure buffer spring 410, and one end of the internal pressure buffer spring 410 is fixedly connected to the surface of the fixed buffer rod 48, and two adjacent ones are fixedly connected. The inclined point buffer rods 49 and the fixed buffer rods 48 between the movable pressure relief pipes 42 are distributed in an equal triangle. The inner wall of each movable pressure relief pipe 42 is fixedly installed with an oil outlet electromagnetic pressure relief valve 411. Each fixed buffer The surface of the rod 48 is fixedly installed with a travel switch 412 corresponding to the electromagnetic pressure relief valve 38 at the oil inlet end. The output end of the travel switch 412 is electrically connected with the input end of the electromagnetic pressure relief valve 38 at the oil inlet end. The travel switch 412 Inside the internal pressure buffer spring 410 sleeved between the fixed buffer rod 48 and the interactive buffer rod, a second connecting flange is fixedly connected to the surface of the connection pipe 31 at the oil inlet end and the surface of the connection pipe 41 at the oil outlet end. 413.

When in use, connect the power supply, connect the liner pipe 33 at the oil inlet end with the external oil inlet pipe, connect the liner pipe 43 at the oil outlet end with the external oil discharge pipe, the bypass pressure relief pipe 32 and each movable pressure relief pipe 42 are also connected. It can be connected to the external oil pipe, start the rotor pump body 1, the oil flow enters the rotor pump body 1 through the oil inlet lining pipe 33 and then is discharged through the oil outlet lining pipe 43. When the pressure at the oil inlet end When it gradually increases, the liner tube 33 at the oil inlet end expands and causes the deformation of each arc-shaped elastic contact piece 36 to offset most of the pipeline pressure. When the pressure makes each arc-shaped elastic contact piece 36 connect to form a complete circuit At this time, the electromagnetic pressure relief valve 38 at the oil inlet end is powered on and turned on, and the oil flow is discharged through the bypass pressure relief pipe 32 for pressure relief. The elastic contact piece 36 is separated, the electromagnetic pressure relief valve 38 at the oil inlet end is closed and the oil is no longer discharged. When the instantaneous reaction force occurs when the oil outlet end is blocked, the elastic rubber tube 45, the oil outlet end lining tube 43 and each The pressure buffer spring 410 undergoes an elastic change, and the pressure is distributed evenly and uniformly across the board, and at a position where the instantaneous pressure is high, the stroke switch 412 is impacted to firstly control the oil outlet electromagnetic pressure relief valve 411 inside the nearby movable pressure relief pipe 42 to open. , the pressure at this angle is released first. When the pressure is not enough to support the elastic rubber tube 45, the oil outlet lining tube 43 and each internal pressure buffer spring 410, the elastic change occurs, and each movable pressure relief tube 42 stops oil discharge.

It should be noted that, in this document, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any relationship between these entities or operations. any such actual relationship or sequence exists. Moreover, the terms "comprising", "comprising" or any other variation thereof are intended to encompass a non-exclusive inclusion such that a process, method, article or device that includes a list of elements includes not only those elements, but also includes not explicitly listed or other elements inherent to such a process, method, article or apparatus. Without further limitation, an element qualified by the phrase "comprising a..." does not preclude the presence of additional identical elements in a process, method, article or apparatus that includes the element.

Claims

A rotor pump with pressure relief protection function, comprising a rotor pump body (1), a support seat (2) for supporting the rotor pump, and an oil inlet pressure relief mechanism for releasing the pressure at the oil inlet end of the rotor pump ( 3) and the oil outlet pressure relief mechanism (4) for removing the instantaneous pressure transmitted from the oil outlet end of the rotor pump, characterized in that a support seat (2) is fixedly connected to the bottom of the rotor pump body (1). ), the bottom of the support seat (2) is fixedly connected with a non-slip shock-absorbing pad (5), and the oil inlet end and the oil outlet end of the rotor pump body (1) are fixedly connected with a first connecting flange (6). ), the oil inlet pressure relief mechanism (3) is arranged at the oil inlet end of the rotor pump body (1), and the oil outlet pressure relief mechanism (4) is arranged at the outlet of the rotor pump body (1). at the oil end.
The rotor pump with pressure relief protection function according to claim 1, characterized in that: the oil inlet pressure relief mechanism (3) comprises an oil inlet connection pipe (31) and a bypass pressure relief pipe (32) and the oil inlet lining pipe (33), one end of the oil inlet connection pipe (31) is connected to the oil inlet end of the rotor pump body (1) through the first connecting flange (6) at the oil inlet end connection, the oil inlet end liner pipe (33) is sleeved inside the oil inlet end connection pipe (31), and one end of the bypass pressure relief pipe (32) penetrates the oil inlet end connection pipe (31) and the oil inlet end liner pipe (33) and extend to the inside of the oil inlet end liner pipe (33), the bypass pressure relief pipe (32) is located at one end inside the oil inlet end liner pipe (33) and The inner wall of the oil end liner pipe (33) is flush.
The rotor pump with pressure relief protection function according to claim 2, characterized in that: one end of the oil inlet lining pipe (33) is communicated with an external oil pipe, and the oil inlet lining pipe (33) has a An oil inlet pressure relief chamber (34) is provided between the surface and the inner wall of the oil inlet end connection pipe (31), the material of the oil inlet end lining pipe (33) includes rubber, and the oil inlet pressure relief chamber (34) The inner wall of 34) is fixedly connected with a plurality of conductive rods (35) distributed in a circumference, and the surface of each said conductive rod (35) is fixedly connected with two symmetrical lines with the center line of the surface of the conductive rod (35) as the center line. Distributed arc-shaped elastic contact pieces (36), an insulating layer (37) is provided inside the oil inlet connection pipe (31), and the surface of the arc-shaped elastic contact pieces (36) is in contact with the insulating layer (37). 37), the inner wall of the insulating layer (37) is fixedly connected with a plurality of vertical buffer springs (39) corresponding to the conductive rods (35) one-to-one, and one end of the vertical buffer springs (39) is connected to the conductive The surface of the rod (35) is fixedly connected.
The rotor pump with pressure relief protection function according to claim 3, characterized in that: the inner wall of the bypass pressure relief pipe (32) is fixedly connected with an oil inlet electromagnetic pressure relief valve (38), the bypass pressure relief valve (38) is fixedly connected to the inner wall of the bypass pressure relief pipe (32). The material of the pressure relief pipe (32) is an insulating material, and the two arc-shaped elastic contact pieces (36) near the bypass pressure relief pipe (32) are respectively connected to the external power supply and the electromagnetic pressure relief of the oil inlet through wires. Valve (38) is connected.
The rotor pump with pressure relief protection function according to claim 4, characterized in that: the oil outlet pressure relief mechanism (4) comprises an oil outlet connection pipe (41), a plurality of movable pressure relief pipes (42) ) and the oil outlet lining pipe (43), one end of the oil outlet lining pipe (43) is communicated with the external oil pipe, and one end of the oil outlet connecting pipe (41) passes through the No. A connecting flange (6) is connected to the oil outlet end of the rotor pump body (1), the oil outlet end lining pipe (43) is sleeved inside the oil inlet end connecting pipe (31), The surface of the oil end connection pipe (41) is provided with a plurality of movable ports (44) corresponding to the movable pressure relief pipes (42) one-to-one, and one end of the plurality of movable pressure relief pipes (42) all pass through the movable ports (42). 44) Passing through the oil outlet end connecting pipe (41) and the oil outlet end liner pipe (43) and extending to the inside of the oil outlet end liner pipe (43), the oil outlet end liner pipe (43) is located at the outlet end. An inner end of the oil end liner pipe (43) is flush with the inner wall of the oil outlet end liner pipe (43). The surface of the oil outlet end lining pipe (43) is equidistantly distributed on the surface of the oil outlet end connecting pipe (41), and the surface of the movable pressure relief pipe (42) is fixedly connected with an elastic rubber tube (45). The surface of the elastic rubber tube (45) is fixedly connected with the inner wall of the movable port (44).
The rotor pump with pressure relief protection function according to claim 5, characterized in that: a resistance is provided between the surface of the oil outlet end lining pipe (43) and the inner wall of the oil outlet end connecting pipe (41). The oil pressure relief chamber (46), the surface of the oil outlet lining pipe (43) is fixedly connected with a number of movable buffer rods (47) distributed in an equidistant circle, and the oil outlet is connected to the pipe (41) There are several fixed buffer rods (48) corresponding to the movable buffer rods (47) one-to-one fixedly connected to the inner wall of the inner wall, and a movable buffer rod (47) is arranged between two adjacent movable pressure relief pipes (42). and a fixed buffer rod (48), an inclined point buffer rod (49) is fixedly connected at the connection between the movable pressure relief pipe (42) and the oil outlet liner pipe (43), and the inclined point buffer rod (49) ) and the surface of the movable buffer rod (47) are fixedly connected with an internal pressure buffer spring (410), one end of the internal pressure buffer spring (410) is fixedly connected with the surface of the fixed buffer rod (48), and two adjacent The inclined point buffer rods (49) and the fixed buffer rods (48) between the two movable pressure relief pipes (42) are distributed in an equal triangle.
The rotor pump with pressure relief protection function according to claim 6, characterized in that: an electromagnetic pressure relief valve (411) at the oil outlet end is fixedly installed on the inner wall of each of the movable pressure relief pipes (42). A travel switch (412) corresponding to the electromagnetic pressure relief valve (38) at the oil inlet end is fixedly installed on the surface of one of the fixed buffer rods (48), and the output end of the travel switch (412) is connected with the oil inlet end. The input end of the electromagnetic pressure relief valve (38) is electrically connected, and the travel switch (412) is sleeved inside the internal pressure buffer spring (410) between the fixed buffer rod (48) and the interactive buffer rod. A second connection flange (413) is fixedly connected to the surface of the oil end connection pipe (31) and the surface of the oil outlet end connection pipe (41).