Rear cover structure with hot jacket for magnetic internal gear pump

Abstract

The utility model discloses a rear cover structure with a hot jacket for a magnetic internal gear pump, a rear cover is provided with an annular cavity-shaped hot jacket cavity, a hot jacket outlet and a hot jacket inlet on a pump cavity side, the hot jacket inlet and the hot jacket outlet are respectively communicated with the hot jacket cavity, and the hot jacket inlet and the hot jacket outlet provide heating fluid to enter and exit from the hot jacket cavity. The rear cover is directly heated by the hot jacket cavity, so that materials in contact with the rear cover are heated, the front, rear and middle parts of the rear cover can be directly contacted with internal materials in a large area, the excircle surface in contact with the outside is small, the heat transfer is fast, and the heat waste is less; the lubricating hole is adjacent to the hot jacket cavity, and the lubricating hole is formed in the edge of the hot jacket cavity, so that the problems of solidification and crystallization of a medium in the lubricating hole during heating can be avoided, and the operation stability of the gear pump is improved; and the cover wall is provided with a forced lubrication port communicated with the lubrication hole, and an outer side port of the forced lubrication port can be communicated with a high-pressure medium, so that the gear pump can be used in a forced lubrication occasion requiring higher pressure.

Description

Technical Field

[0001] The utility model relates to the technical field of internal gear pumps, in particular to a rear cover structure of a magnetic internal gear pump with a thermal jacket. Background Art

[0002] The internal gear pump has the advantages of small size, light weight, simple structure, easy manufacturing, low price, reliable operation, good self-priming performance, insensitivity to oil contamination, and easy maintenance.

[0003] Magnetic internal gear pumps can handle toxic media that are easy to solidify and crystallize well, but the magnetic internal gear pumps with post-heating jackets on the market all have a jacket on the fixed frame outside the external magnetic steel to heat the medium in the pump, thereby preventing the medium in the pump from solidifying or crystallizing.

[0004] Most of this jacket is in contact with the outside world, resulting in serious heat waste. Since it is not on the pump back cover, it cannot directly contact the medium in the pump. It is necessary to transfer heat to the outer circle of the back cover through the middle isolation sleeve and conduct the heat to the inside of the back cover to heat the medium in the pump.

[0005] Since the contact surface with the outside world is large and the conduction contact surface is small, and some heat is used to heat the external magnetic steel, which leads to the risk of demagnetization of the external magnetic steel, this jacket wastes a lot of heat, has a slow heating speed, and unnecessary heating of the external magnetic steel has the risk of damaging the magnetic steel. Utility Model Content

[0006] In response to the problems in the related technology, the present application discloses a rear cover structure of a magnetic internal gear pump with a heat jacket, which solves the problem in the related technology of the magnetic internal gear pump that the outer heating jacket of the pump heats the medium in the pump, the heating efficiency is low, the heat waste is large, and there is a risk of damage to the external magnetic steel.

[0007] To achieve the above objectives, this application provides the following technical solutions:

[0008] A rear cover structure with a heat jacket for a magnetic internal gear pump comprises a rear cover, a front shaft sleeve hole and a rear shaft sleeve hole are arranged concentrically at the center of the rear cover, a raised cover wall is arranged around the outer side of the front shaft sleeve hole, the cover wall semi-encloses the front shaft sleeve hole to form a pump cavity, the pump cavity flows through the pump cavity, the cover wall is provided with an annular heat jacket cavity on the pump cavity side, a heat jacket outlet and a heat jacket inlet are provided on the cover wall, the heat jacket inlet and the heat jacket outlet are respectively connected to the heat jacket cavity, the heat jacket inlet and the heat jacket outlet provide heating fluid to enter and exit the heat jacket cavity, and the heat jacket cavity is directly in contact with the material in the pump cavity for heating.

[0009] As a further solution of the present application: the heat jacket cavity is arranged in a circular ring cavity shape with the center line of the rear cover as the axis.

[0010] As a further solution of the present application: the heat jacket inlet is arranged at the lower part of the heat jacket cavity, and the heat jacket outlet is arranged at the upper part of the heat jacket cavity.

[0011] As a further solution of the present application: a heat conduction plate is sealed between the heat jacket cavity and the pump cavity, the heat conduction plate is located between the heat jacket cavity and the pump cavity for heat conduction, and the heat jacket cavity is heated by contact with the material in the pump cavity through the heat conduction plate.

[0012] As a further solution of the present application: a plurality of lubrication holes penetrating front to back are evenly arranged on the cover wall, the lubrication holes are connected to the pump cavity, and the lubrication holes can transport the material on the front side of the rear cover to the rear side.

[0013] As a further solution of the present application: the lubrication holes are arranged around the outside of the heat jacket cavity, and the lubrication holes are arranged adjacent to the heat jacket cavity.

[0014] As a further solution of the present application: a forced lubrication port connected to the lubrication hole is provided on the cover wall, and an outer port of the forced lubrication port can be connected to a high-pressure medium.

[0015] In summary, the beneficial effects of this application are:

[0016] 1. The magnetic internal gear pump has a rear cover structure with a heat jacket. The rear cover is provided with a raised cover wall around the outer side of the front shaft sleeve hole. The cover wall half surrounds the front shaft sleeve hole to form a pump cavity. The pumping material flows through the pump cavity. The cover wall is provided with a cavity-shaped heat jacket cavity on the pump cavity side. The cover wall is provided with a heat jacket outlet and a heat jacket inlet. The heat jacket inlet and the heat jacket outlet are respectively connected with the heat jacket cavity. The heat jacket inlet and the heat jacket outlet provide heating fluid to enter and exit the heat jacket cavity. The heat jacket cavity is directly in contact with the material in the pump cavity through the heat conduction plate for heating. The front and rear of the rear cover with the heat jacket cavity can directly contact with the inside of the rear cover and the front and rear materials over a large area. The outer cylindrical surface in contact with the outside world is small, the heat transfer is fast, and the heat waste is small.

[0017] 2. A heat conduction plate is sealed between the heat jacket cavity and the pump cavity. The heat conduction plate is located between the heat jacket cavity and the pump cavity for heat conduction and has a high heat conduction efficiency.

[0018] 3. Multiple front-to-back lubrication holes are evenly arranged on the cover wall. The lubrication holes are connected to the pump cavity. The lubrication holes can transport the material from the front side of the rear cover to the rear side. The lubrication holes are arranged around the outside of the heat jacket cavity. The lubrication holes are arranged adjacent to the heat jacket cavity. The lubrication holes are arranged on the edge of the heat jacket cavity, which can ensure that the medium in the lubrication holes will not solidify or crystallize when heated, thereby improving the operating stability of the gear pump.

[0019] 4. A forced lubrication port connected to the lubrication hole is provided on the cover wall. The outer port of the forced lubrication port can be connected to the high-pressure medium, which meets the use of the gear pump in situations where higher pressure forced lubrication is required. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The accompanying drawings are used to provide further understanding of the present application and constitute a part of the specification. They are used to explain the present application together with the embodiments of the present application and do not constitute a limitation of the present application.

[0021] In the attached picture:

[0022] Figure 1 This is a schematic diagram of the side structure of the back cover of this application.

[0023] Figure 2 This is a structural schematic diagram of the YY section of the back cover of this application.

[0024] Figure 3 This is a structural schematic diagram of the ZZ section of the back cover of this application.

[0025] Reference numerals:

[0026] 1. Heat conduction plate; 2. Rear cover; 2a. Lubrication hole; 2b. Heat jacket outlet; 2c. Heat jacket inlet; 2d. Forced lubrication port; 2e. Front shaft sleeve hole; 2f. Rear shaft sleeve hole; 3. Cover wall; 4. Heat jacket cavity; 5. Pump cavity; DETAILED DESCRIPTION

[0027] Exemplary embodiments will be described in detail herein, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, the same numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the following exemplary embodiments do not represent all implementations consistent with the present application. Instead, they are merely examples of devices and methods consistent with some aspects disclosed in the present embodiments as detailed in the appended claims.

[0028] It should be noted that all directional indications in the embodiments (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0029] In addition, the descriptions of "first", "second", etc. in the embodiments are only for descriptive purposes, and do not specifically refer to the order or sequence, nor are they used to limit the present application. They are only used to distinguish components or operations described with the same technical terms, and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present application.

[0030] In order to further understand the content, features and effects of the present application, the following embodiments are given as examples and described in detail with reference to the accompanying drawings:

[0031] like Figure 1-3 As shown:

[0032] The rear cover structure of the magnetic internal gear pump with a heat jacket comprises a rear cover 2, wherein a front sleeve hole 2e and a rear sleeve hole 2f are arranged at the center of the rear cover 2, and the front sleeve hole 2e and the rear sleeve hole 2f are arranged concentrically.

[0033] The rear cover 2 is provided with a raised cover wall 3 around the outer side of the front sleeve hole 2e. The cover wall 3 half surrounds the front sleeve hole 2e to form a pump cavity 5, and the pumping material flows through the pump cavity 5.

[0034] The cover wall 3 is provided with a hollow heat jacket cavity 4 on the pump cavity 5 side, and the heat jacket cavity 4 is arranged in a circular ring cavity shape with the center line of the rear cover 2 as the axis. The cover wall 3 is provided with a heat jacket outlet 2b and a heat jacket inlet 2c, the heat jacket inlet 2c is arranged at the lower part of the heat jacket cavity 4, and the heat jacket outlet 2b is arranged at the upper part of the heat jacket cavity 4. The heat jacket inlet 2c and the heat jacket outlet 2b are respectively connected with the heat jacket cavity 4, and the heat jacket inlet 2c and the heat jacket outlet 2b provide heating fluid to enter and exit the heat jacket cavity 4, and the heat jacket cavity 4 is directly in contact with the material in the pump cavity 5 through the heat conduction plate 1 for heating.

[0035] A heat conduction plate 1 is sealed between the heat jacket cavity 4 and the pump cavity 5 , and the heat conduction plate 1 is located between the heat jacket cavity 4 and the pump cavity 5 for heat conduction.

[0036] The cover wall 3 is evenly provided with a plurality of lubrication holes 2a that penetrate from front to back. The lubrication holes 2a are connected to the pump cavity 5. The lubrication holes 2a can transport the material on the front side of the rear cover 2 to the rear side.

[0037] The lubrication holes 2a are arranged around the outer side of the heat jacket cavity 4, and the lubrication holes 2a are arranged adjacent to the heat jacket cavity 4.

[0038] A forced lubrication port 2d communicating with the lubrication hole 2a is provided on the cover wall 3, and an outer port of the forced lubrication port 2d can be communicated with a high-pressure medium.

[0039] More specifically, a circular cavity is machined on the rear cover 2 having the front sleeve hole 2e and the rear sleeve hole 2f, and the heat conduction plate 1 is welded to the rear cover 2 by an annular weld to form a closed heat jacket cavity 4. The heat jacket outlet 2b and the heat jacket inlet 2c are machined from the outer circle of the rear cover 2 to communicate with the heat jacket cavity 4, so that the external heating fluid flows in from the heat jacket inlet 2c, heats the rear cover 2 after passing through the jacket cavity, and heats the pumping medium before and after the rear cover 2, and finally flows out from the jacket outlet.

[0040] A lubrication hole 2a is drilled through the rear cover 2 to avoid the jacket cavity, so that the pumping medium in front of the rear cover 2 can flow through the front lubrication hole 2a to lubricate the parts behind the rear cover 2. At the same time, the lubrication hole 2a is very close to the heat jacket cavity 4 to ensure that the pumping medium flowing through the lubrication hole 2a will not solidify.

[0041] A forced lubrication port 2d connected to the lubrication hole 2a is machined on the outer circle of the rear cover 2 facing the lubrication hole 2a, and a suitable high-pressure pumping medium can be introduced from other parts of the pump, thereby meeting the occasion where the lubrication hole 2a requires a higher pressure.

[0042] In practical application:

[0043] The rear cover 2 is provided with a raised cover wall 3 around the outer side of the front shaft sleeve hole 2e. The cover wall 3 semi-encloses the front shaft sleeve hole 2e side to form a pump chamber 5. The pumped material flows through the pump chamber 5. The cover wall 3 is provided with a hollow heat jacket chamber 4 on the pump chamber 5 side. The cover wall 3 is provided with a heat jacket outlet 2b and a heat jacket inlet 2c. The heat jacket inlet 2c and the heat jacket outlet 2b are respectively connected with the heat jacket chamber 4. The heat jacket inlet 2c and the heat jacket outlet 2b provide heating fluid to enter and exit the heat jacket chamber 4. The heat jacket chamber 4 is directly in contact with the material in the pump chamber 5 through the heat conduction plate 1 for heating. The heat jacket chamber 4 arranged inside the rear cover 2 can directly contact with the internal material over a large area in the front and rear, and the outer cylindrical surface in contact with the outside world is small, so the heat transfer is fast and the heat waste is small.

[0044] A heat conduction plate 1 is sealed between the heat jacket cavity 4 and the pump cavity 5. The heat conduction plate 1 is located between the heat jacket cavity 4 and the pump cavity 5 for heat conduction and has a high heat conduction efficiency.

[0045] A plurality of lubrication holes 2a are evenly arranged on the cover wall 3 and pass through from front to back. The lubrication holes 2a are connected to the pump chamber 5. The lubrication holes 2a can transport the material on the front side of the rear cover 2 to the rear side. The lubrication holes 2a are arranged around the outside of the heat jacket chamber 4. The lubrication holes 2a are arranged adjacent to the heat jacket chamber 4. The lubrication holes 2a are arranged on the side of the heat jacket chamber 4, which can ensure that the medium in the lubrication holes 2a will not solidify or crystallize when heated, thereby improving the operating stability of the gear pump.

[0046] The cover wall 3 is provided with a forced lubrication port 2d connected to the lubrication hole 2a. The outer port of the forced lubrication port 2d can be connected to a high-pressure medium, which satisfies the use of the gear pump in situations where forced lubrication at a higher pressure is required.

[0047] Finally, it should be noted that the above disclosure is only a preferred embodiment of the present application and is not intended to limit the present application. Although the present application is described in detail with reference to the aforementioned embodiments, it is still possible for a person skilled in the art to modify the technical solutions described in the aforementioned embodiments or to replace some of the technical features therein by equivalents. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present application shall be included in the scope of protection of the present application. The scope of the present application is limited only by the attached claims.

Claims

1. A rear cover structure of a magnetic internal gear pump with a heat jacket, comprising a rear cover (2), characterized in that: The center of the rear cover (2) is provided with a front shaft sleeve hole (2e) and a rear shaft sleeve hole (2f), and the front shaft sleeve hole (2e) and the rear shaft sleeve hole (2f) are concentrically arranged. The rear cover (2) is provided with a raised cover wall (3) around the outer side of the front shaft sleeve hole (2e), and the cover wall (3) semi-encloses the front shaft sleeve hole (2e) to form a pump cavity (5), and the pumping material flows through the pump cavity (5). The cover wall (3) is provided with an annular cavity-shaped heat jacket cavity (4) on the pump cavity (5) side, and the cover wall (3) is provided with a heat jacket outlet (2b) and a heat jacket inlet (2c), and the heat jacket inlet (2c) and the heat jacket outlet (2b) are respectively connected to the heat jacket cavity (4), and the heat jacket inlet (2c) and the heat jacket outlet (2b) provide heating fluid to enter and exit the heat jacket cavity (4).

2. The rear cover structure of a magnetic internal gear pump with a heat jacket according to claim 1 is characterized in that: The heat jacket cavity (4) is arranged in a circular ring cavity shape with the center line of the rear cover (2) as the axis.

3. The rear cover structure of a magnetic internal gear pump with a heat jacket according to claim 1, characterized in that: The heat jacket inlet (2c) is arranged at the lower part of the heat jacket cavity (4), and the heat jacket outlet (2b) is arranged at the upper part of the heat jacket cavity (4).

4. The rear cover structure of a magnetic internal gear pump with a heat jacket according to claim 1 is characterized in that: A heat conduction plate (1) is sealed between the heat jacket cavity (4) and the pump cavity (5). The heat conduction plate (1) is located between the heat jacket cavity (4) and the pump cavity (5) for heat conduction. The heat jacket cavity (4) is heated by contact with the material in the pump cavity (5) through the heat conduction plate (1).

5. The rear cover structure of a magnetic internal gear pump with a heat jacket according to claim 1, characterized in that: The cover wall (3) is evenly provided with a plurality of lubrication holes (2a) that penetrate from front to back, the lubrication holes (2a) being connected to the pump cavity (5), and the lubrication holes (2a) can transport materials from the front side of the rear cover (2) to the rear side.

6. The rear cover structure of a magnetic internal gear pump with a heat jacket according to claim 5, characterized in that: The lubrication holes (2a) are arranged around the outside of the heat jacket cavity (4), and the lubrication holes (2a) are arranged adjacent to the heat jacket cavity (4).

7. The rear cover structure of a magnetic internal gear pump with a heat jacket according to claim 5, characterized in that: The cover wall (3) is provided with a forced lubrication port (2d) which is in communication with the lubrication hole (2a); the outer side of the forced lubrication port (2d) can be in communication with a high-pressure medium.

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