Vane pump with anti-leakage function for hydraulic equipment

Abstract

The present invention discloses a vane pump with anti-leakage function for hydraulic equipment, which belongs to the technical field of vane pump equipment, and includes a support, a base shell assembly and a vane assembly. The support is used for fixed installation, and the base shell assembly includes a shell and an end cover. The shell has a cylindrical cavity, the opening of the cavity is sealed by the end cover, and is fixed by bolts passing through the end cover. The shell is fixed to the support by bolts, and the end face tube of the shell is penetrated by a plurality of through holes. The fixing bolts are installed at both ends of the through holes to complete the sealing of the ends of the through holes. The vane assembly includes a runner, a vane and a shaft body. A coaxially distributed shaft body is installed in the shell, a runner is eccentrically installed on the shaft body, and a plurality of retractable vanes are installed on the runner. The invention fixes the vane pump on the hydraulic equipment through the support provided, so as to facilitate the transmission connection between the shaft body and the output shaft of the engine.

Description

Technical Field

[0001] The invention relates to the field of vane pump equipment, in particular to a vane pump with an anti-leakage function for hydraulic equipment. Background Art

[0002] There are three main types of pumps used to pump fluids, namely plunger pumps, gear pumps and vane pumps. Vane pumps are widely used in many mechanical fields because of their excellent working performance.

[0003] The structure of the existing vane pump mainly includes a stator and a rotor. The rotor is rotatably arranged in the stator, and a cavity is formed between the stator and the rotor. The inner wall surface of the stator is approximately elliptical, so that a fluid suction area, a fluid compression area and a vane retraction area are formed in the cavity. A plurality of vane grooves are arranged in the radial direction of the rotor, and a vane is slidably arranged in each vane groove. After the rotor rotates, under the action of centrifugal force, the outer part of the vane can extend into the cavity.

[0004] The internal pressure of the vane pump changes greatly during operation and shutdown. After long-term use, the internal pressure changes, causing the bolts of the end cover used to install the vane pump seal to loosen, causing the vane pump to leak, thereby reducing the efficiency of the vane pump. Summary of the invention

[0005] In order to solve the above technical problems, the present invention provides a vane pump with anti-leakage function for hydraulic equipment, including a support, a base shell assembly and a vane assembly, the support is used for fixed installation, the base shell assembly includes a shell and an end cover, the shell has a cylindrical cavity, the opening of the cavity is sealed by the end cover and fixed by bolts passing through the end cover, the shell is fixed to the support by bolts, the end surface of the shell is penetrated by a plurality of through holes, the fixing bolts are installed at both ends of the through holes to complete the sealing of the ends of the through holes, the vane assembly includes a runner, vanes and a shaft body, a coaxially distributed shaft body is installed in the shell, a runner is eccentrically installed on the shaft body, and a plurality of retractable vanes are installed on the runner.

[0006] Furthermore, the support includes a base plate and a vertical plate, the vertical plate is vertically installed on one side of the base plate, a plurality of protrusions are provided on the mounting surface of the vertical plate, a positioning hole is provided in the middle of the vertical plate, a plurality of limiting grooves are opened on the base plate, and screws for fixing the base plate are installed in the limiting grooves.

[0007] Furthermore, the shell is a cylindrical structure, and a deep hole is opened on one end face of the shell, and the deep hole opens to form a cavity. The other end face of the shell is provided with a convex ring and a groove. There are several grooves, and the grooves are distributed in a ring around the convex ring. At the same time, the grooves correspond to the protrusions one by one. The shell is installed on the vertical plate, and the convex ring is installed in cooperation with the positioning hole, and the groove is installed in cooperation with the corresponding protrusion.

[0008] Furthermore, the shell is connected with a liquid inlet pipe and a liquid outlet pipe, and the liquid inlet pipe and the liquid outlet pipe are symmetrically distributed along the axis center of the shell, and the axis of the liquid inlet pipe and the axis of the liquid outlet pipe are parallel to each other. The inner wall of the shell is also provided with an arc groove 1 and an arc groove 2, and the arc groove 1 is connected with the liquid inlet pipe, and the arc groove 2 is connected with the liquid outlet pipe.

[0009] Furthermore, a ring body is provided on the outer side of the shell, an annular through groove is provided in the ring body, the annular channel is communicated with the middle parts of a plurality of through holes, and a valve body is connected to the ring body.

[0010] Furthermore, a connecting assembly is installed in the liquid inlet pipe and the liquid outlet pipe, and a deep hole connected to the shell is provided in the liquid inlet pipe and the liquid outlet pipe, and an inner body is provided at the port of the liquid inlet pipe and the port of the liquid outlet pipe. The connecting assembly includes a rod-shaped member, a spring and a limit ring. The main body of the rod-shaped member is a long rod, and a ring seat is provided at the middle part of the outer side of the rod-shaped member, the outer diameter of the ring seat is the same as the inner diameter of the deep hole, the outer diameter of the long rod is the same as the inner diameter of the inner body, one end of the long rod of the installed rod-shaped member extends out of the inner body, and a limit ring is cooperated with and installed in the inner end part of the deep hole, the inner diameter of the limit ring is the same as the outer diameter of the long rod, and the other end of the long rod of the rod-shaped member passes through the limit ring and is connected to the inside of the shell, and a spring is sleeved on the long rod, and the spring is located between the ring seat and the inner body.

[0011] Furthermore, a ring groove is provided on one side of the ring seat close to the axis of the shell, and a gap is formed between the ring groove and the limit ring. The gap is connected to the annular groove of the ring body through a connecting hole. The ring seat is moved outward so that the air inside the through hole enters the gap through the annular groove.

[0012] Furthermore, an impeller is installed on the protruding end of the shaft.

[0013] Furthermore, a circular ring is provided on the outer side of the impeller, annular notches are formed on both the inner and outer sides of the circular ring, and a slope is provided on the outer side of the circular ring, the slope being close to one side of the impeller.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] 1. The present invention fixes the vane pump on the hydraulic equipment through the support provided, and at the same time changes the height of the vane pump shaft through the support, so as to facilitate the transmission connection between the shaft and the engine output shaft. In addition, a plurality of limit grooves are opened on the base plate, so as to facilitate the installation between the vane pump and the vertical plate.

[0016] 2. In the process of meshing installation through the interface of the external pipeline, the present invention pulls the installed rod-shaped member outward and compresses the spring. At the same time, the gap between the limit ring and the ring seat increases. Under the action of negative pressure, the air inside the through hole enters the gap through the annular groove, thereby forming a negative pressure inside the through hole, which makes it easier for the meshing teeth to stick to each other and avoid loosening.

[0017] 3. The present invention reduces the internal air pressure of the through hole so that the installed bolts are subjected to the thrust of the external atmospheric pressure, thereby increasing the pressure between the meshing teeth and improving the reliability of the bolt installation. This effectively solves the problem that during the operation of the vane pump, as the internal pressure of the shell increases, the bolts used to fix the end cover become loose, causing oil leakage at the end cover.

[0018] 4. The present invention opens the valve body to communicate with the outside air for pressure relief, thereby ensuring that the internal pressure of the through hole is the same as the external atmospheric pressure, making it easy to remove the mounting bolts during maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall assembly structure of the present invention;

[0020] Figure 2 It is a schematic diagram of the overall structure of the vane pump of the present invention;

[0021] Figure 3 It is a schematic diagram of the explosion structure of the vane pump of the present invention;

[0022] Figure 4 It is a schematic diagram of the structure of the vane pump support of the present invention;

[0023] Figure 5 It is a schematic diagram of the cross-sectional structure of the liquid inlet pipe of the vane pump of the present invention;

[0024] Figure 6 It is a schematic diagram of the structure of the expanded parts of the vane pump connection assembly of the present invention;

[0025] Figure 7 It is a schematic diagram of the cross-sectional structure of the vane pump ring body of the present invention;

[0026] Figure 8 It is a schematic diagram of the impeller installation structure of the present invention;

[0027] Fig. 9 It is a schematic diagram of the support structure of the present invention;

[0028] Fig.10 It is a schematic diagram of the cross-sectional structure of the base shell assembly of the present invention.

[0029] In the figure: 1, support; 101, base plate; 102, vertical plate; 103, convex block; 2, shell; 201, liquid inlet pipe; 202, ring body; 203, through hole; 204, arc groove 1; 205, arc groove 2; 206, liquid outlet pipe; 207, convex ring; 208, shaft hole; 209, groove; 3, end cover; 4, bolt; 5, impeller; 6, blade; 7, shaft body; 8, rod-shaped member; 801, ring seat; 9, spring; 10, limit ring; 11, valve body; 12, impeller; 1201, circular ring; 1202, inclined surface. DETAILED DESCRIPTION

[0030] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. The embodiments of the present invention are provided for the purpose of illustration and description, and are not intended to be exhaustive or to limit the present invention to the disclosed forms. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiments are selected and described in order to better illustrate the principles and practical applications of the present invention, and to enable those of ordinary skill in the art to understand the present invention and thereby design various embodiments with various modifications suitable for specific uses.

[0031] See also Figure 1-Figure 10 As shown, the present invention is a vane pump with anti-leakage function for hydraulic equipment, comprising a support 1, wherein the support 1 is used for fixed installation;

[0032] The support 1 includes a base plate 101 and a vertical plate 102. The vertical plate 102 is vertically mounted on one side of the base plate 101. A plurality of protrusions 103 are arranged on the mounting surface of the vertical plate 102. A positioning hole is arranged in the middle of the vertical plate 102. A plurality of limiting grooves are opened on the base plate 101. The base plate 101 is fixed with screws installed in the limiting grooves.

[0033] The vane pump is fixedly installed on the hydraulic equipment through the support 1. At the same time, the height of the vane pump shaft 7 is changed by the support 1, which facilitates the transmission connection between the shaft 7 and the engine output shaft. In addition, a number of limit grooves are opened on the base plate 101 to facilitate the installation between the vane pump and the vertical plate 102.

[0034] The base shell assembly includes a shell 2 and an end cover 3. The shell 2 has a cylindrical cavity. The opening of the cavity is sealed by the end cover 3 and fixed by bolts 4 passing through the end cover 3. The shell 2 is fixed to the support 1 by the bolts 4;

[0035] The end surface of the housing 2 is penetrated with a plurality of through holes 203, and fixing bolts 4 are installed at both ends of the through holes 203 to complete the sealing of the ends of the through holes 203;

[0036] The blade assembly includes a runner 5, blades 6 and a shaft 7. The shaft 7 is coaxially installed in the housing 2, the runner 5 is eccentrically installed on the shaft 7, and a plurality of retractable blades 6 are installed on the runner 5.

[0037] The base shell assembly is made of cast metal material. Internal screw holes are provided at both ends of the through hole 203. Bolts 4 are installed in cooperation with the internal threads to achieve sealing. After the two ends of the through hole 203 are sealed by bolts 4, a closed chamber is formed inside.

[0038] During operation, the shaft 7 drives the impeller 5 to rotate synchronously. The blades 6 slidably mounted on the impeller 5 move outward under the action of centrifugal force, so that the outer ends of the blades 6 are close to the inner wall of the shell 2. Two adjacent blades 6 and the inner wall of the shell 2 form a cavity. As the impeller 5 rotates, the volume of the cavity increases from small to large and then decreases, and the cycle continues.

[0039] The shell 2 is a cylindrical structure. A deep hole is provided on one end surface of the shell 2 to form a cavity. A convex ring 207 and a groove 209 are provided on the other end surface of the shell 2. A plurality of grooves 209 are provided. The plurality of grooves 209 are distributed in an annular manner around the convex ring 207. The grooves 209 correspond to the protrusions 103 one by one. The shell 2 is installed on the vertical plate 102. The convex ring 207 is installed in cooperation with the positioning hole, and the grooves 209 are installed in cooperation with the corresponding protrusions 103.

[0040] The grooves 209 are matched to each other to realize positioning installation, so that the bolts 4 installed on the vertical plate 102 are aligned with the through holes 203 .

[0041] The shell 2 is connected with a liquid inlet pipe 201 and a liquid outlet pipe 206. The liquid inlet pipe 201 and the liquid outlet pipe 206 are symmetrically distributed along the axis of the shell 2. At the same time, the axis of the liquid inlet pipe 201 and the axis of the liquid outlet pipe 206 are parallel to each other. The inner wall of the shell 2 is also provided with an arc groove 1 204 and an arc groove 205. The arc groove 1 204 is connected with the liquid inlet pipe 201, and the arc groove 205 is connected with the liquid outlet pipe 206.

[0042] In the process of the volume of a cavity formed by two adjacent blades 6 and the inner wall of the shell 2 increasing from small to large, the cavity is connected with the arc groove 1 204 and the liquid inlet pipe 201, and the oil enters the cavity under the action of negative pressure;

[0043] In the process of the volume of a cavity formed by two adjacent blades 6 and the inner wall of the shell 2 changing from large to small, the cavity is connected with the second arc groove 205 and the liquid outlet pipe 206, and the oil in the cavity enters the liquid outlet pipe 206 for discharge, thereby pushing the oil to move to one side;

[0044] In addition, the arc groove 1 204 and the arc groove 205 are symmetrically distributed along the axis of the shell 2, so as to be connected with multiple cavities on both sides at the same time, so as to facilitate rapid liquid inflow or liquid discharge.

[0045] An annular body 202 is disposed on the outer side of the housing 2 . An annular through groove is disposed inside the annular body 202 . The annular channel is communicated with the middle parts of a plurality of through holes 203 . The valve body 11 is connected to the annular body 202 .

[0046] A connecting assembly is installed in the liquid inlet pipe 201 and the liquid outlet pipe 206. A deep hole connected to the shell body 2 is provided in the liquid inlet pipe 201 and the liquid outlet pipe 206. The ports of the liquid inlet pipe 201 and the liquid outlet pipe 206 are provided with an inner body. The connecting assembly includes a rod-shaped member 8, a spring 9 and a limit ring 10. The main body of the rod-shaped member 8 is a long rod. A ring seat 801 is provided in the middle part of the outer side of the rod-shaped member 8. The outer diameter of the ring seat 801 is the same as the inner diameter of the deep hole, and the outer diameter of the long rod is the same as the inner diameter of the inner body. One end of the long rod of the installed rod-shaped member 8 extends out of the inner body, and a limit ring 10 is installed in the inner end portion of the deep hole. The inner diameter of the limit ring 10 is the same as the outer diameter of the long rod. The other end of the long rod of the rod-shaped member 8 passes through the limit ring 10 and is connected to the inside of the shell body 2. A spring 9 is sleeved on the long rod, and the spring 9 is located between the ring seat 801 and the inner body.

[0047] An external thread is provided on the end of the rod-shaped member 8 extending out of the liquid inlet pipe 201 or the liquid outlet pipe 206. When the liquid inlet pipe 201 or the liquid outlet pipe 206 is connected with an external pipeline, the connection is achieved by installing the rod-shaped member 8 on the external thread through the interface of the external pipeline. During the process of meshing installation, the installed rod-shaped member 8 is pulled outward to complete the compression of the spring 9. At the same time, the gap formed between the limit ring 10 and the ring seat 801 increases. Under the action of negative pressure, the air inside the through hole 203 enters the gap through the annular groove, thereby achieving negative pressure inside the through hole 203. At the same time, the volume inside the annular groove can be ignored, which does not affect the pressure change inside the gap.

[0048] By reducing the air pressure inside the through hole 203, the installed bolt 4 is subjected to the thrust of the external atmospheric pressure, thereby increasing the pressure between the meshing teeth and improving the reliability of the installation of the bolt 4. This effectively solves the problem that during the operation of the vane pump, as the internal pressure of the shell 2 increases, the bolt 4 used to fix the end cover 3 is loosened, causing oil leakage at the end cover 3.

[0049] A ring groove is provided on one side of the ring seat 801 close to the axis of the housing 2, and a gap is formed between the ring groove and the limiting ring 10. The gap is connected to the annular groove of the ring body 202 through a connecting hole. When the ring seat 801 is moved outward, the air inside the through hole 203 enters the gap through the annular groove.

[0050] The ring body 202 is connected to a valve body 11, through which the air inside the through hole 203 can be extracted, thereby further reducing the internal pressure of the through hole 203 and improving the tightness of the installation of the bolt 4. In addition, the valve body 11 is opened to connect with the external air for pressure relief, thereby ensuring that the internal pressure of the through hole 203 is the same as the external atmospheric pressure, which facilitates the removal of the installation bolt 4 during maintenance.

[0051] An impeller 12 is mounted on the protruding end of the shaft body 7 .

[0052] A circular ring 1201 is provided on the outer side of the impeller 12, and an annular notch is formed on both the inner and outer sides of the circular ring 1201. A slope 1202 is provided on the outer side of the circular ring 1201, and the slope 1202 is close to one side of the impeller 12;

[0053] As the impeller 12 rotates following the shaft 7 , the impeller 12 pushes the air toward one side, achieves air intake through the inner annular notch, and achieves exhaust through the outer annular notch, thereby improving the air flowability at the connection between the impeller 12 and the shaft hole 208 , thereby improving the heat dissipation effect at the shaft hole 208 .

[0054] Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field and related fields without creative work should fall within the scope of protection of the present invention. The structures, devices and operating methods not specifically described and explained in the present invention are implemented according to the conventional means in the field unless otherwise specified and limited.

Claims

1. A vane pump with anti-leakage function for hydraulic equipment, characterized in that: include: A support (1), the support (1) being used for fixed installation; A base shell assembly, the base shell assembly comprising a shell (2) and an end cover (3), the shell (2) having a cylindrical cavity, the opening of the cavity being sealed by the end cover (3) and being fixed by bolts (4) passing through the end cover (3), the shell (2) being fixed to the support (1) by the bolts (4); The end surface of the shell (2) is penetrated by a plurality of through holes (203), and fixing bolts (4) are installed at both ends of the through holes (203) to seal the ends of the through holes (203); A blade assembly, the blade assembly comprising a rotor (5), blades (6) and a shaft (7), the housing (2) having a coaxially distributed shaft (7), the rotor (5) being eccentrically mounted on the shaft (7), and the rotor (5) having a plurality of retractable blades (6) mounted on the rotor (5); The shell (2) is connected to a liquid inlet pipe (201) and a liquid outlet pipe (206), the liquid inlet pipe (201) and the liquid outlet pipe (206) are symmetrically distributed along the axis of the shell (2), and the axis of the liquid inlet pipe (201) and the axis of the liquid outlet pipe (206) are parallel to each other; The inner wall of the housing (2) is further provided with an arc-shaped groove 1 (204) and an arc-shaped groove 2 (205), wherein the arc-shaped groove 1 (204) is connected to the liquid inlet pipe (201), and the arc-shaped groove 2 (205) is connected to the liquid outlet pipe (206); An annular body (202) is provided on the outer side of the shell (2), an annular through groove is provided inside the annular body (202), and the annular channel is connected to the middle parts of a plurality of through holes (203); The ring body (202) is connected to a valve body (11); The liquid inlet pipe (201) and the liquid outlet pipe (206) are both installed with connection components; The liquid inlet pipe (201) and the liquid outlet pipe (206) are both provided with deep holes communicating with the housing (2), and the ports of the liquid inlet pipe (201) and the liquid outlet pipe (206) are both provided with inner edges; The connecting assembly comprises a rod-shaped member (8), a spring (9) and a limiting ring (10); the main body of the rod-shaped member (8) is a long rod; a ring seat (801) is provided in the middle of the outer side of the rod-shaped member (8); the outer diameter of the ring seat (801) is the same as the inner diameter of the deep hole; the outer diameter of the long rod is the same as the inner diameter of the inner edge body; one end of the long rod of the installed rod-shaped member (8) extends out of the inner edge body; A limiting ring (10) is fitted in the inner end of the deep hole, the inner diameter of the limiting ring (10) being the same as the outer diameter of the long rod, and the other end of the long rod of the rod-shaped member (8) passes through the limiting ring (10) and is in communication with the interior of the housing (2); A spring (9) is sleeved on the long rod, and the spring (9) is located between the ring seat (801) and the inner edge body; A ring groove is provided on one side of the ring seat (801) close to the axis of the housing (2), a gap is formed between the ring groove and the limiting ring (10), and the gap is connected to the annular groove of the ring body (202) via a connecting hole; The ring seat (801) is moved outward, so that the air inside the through hole (203) enters the gap through the annular groove.

2. A vane pump with anti-leakage function for hydraulic equipment according to claim 1, characterized in that: The support (1) comprises a base plate (101) and a vertical plate (102), and the vertical plate (102) is vertically mounted on one side of the base plate (101); A plurality of protrusions (103) are provided on the mounting surface of the vertical plate (102), and a positioning hole is provided in the middle of the vertical plate (102); The base plate (101) is provided with a plurality of limiting grooves, and screws for fixing the base plate (101) are installed in the limiting grooves.

3. The vane pump with anti-leakage function for hydraulic equipment according to claim 2, characterized in that: The shell (2) is a cylindrical structure, and a deep hole is provided on one end surface of the shell (2), the deep hole forming a cavity; The other end surface of the housing (2) is provided with a convex ring (207) and a groove (209), wherein a plurality of the grooves (209) are provided, and the plurality of the grooves (209) are distributed in an annular shape around the convex ring (207), and the grooves (209) correspond one to one with the protrusions (103); The housing (2) is mounted on the vertical plate (102), and the convex ring (207) is mounted in cooperation with the positioning hole, and the groove (209) is mounted in cooperation with the corresponding convex block (103).

4. The vane pump with anti-leakage function for hydraulic equipment according to claim 1, characterized in that: An impeller (12) is mounted on the protruding end of the shaft body (7).

5. The vane pump with anti-leakage function for hydraulic equipment according to claim 4, characterized in that: A circular ring (1201) is provided on the outer side of the impeller (12), annular notches are formed on both the inner and outer sides of the circular ring (1201), and an inclined surface (1202) is provided on the outer side of the circular ring (1201), the inclined surface (1202) being close to one side of the impeller (12).

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