Oil pump, compressor and refrigeration equipment

Abstract

The oil pump comprises an oil suction pipe, an oil suction pipe core, a supporting rod and a sling, the oil suction pipe core is inserted into the oil suction pipe, the oil suction pipe core is in clearance fit with the oil suction pipe, and a spirally-rising oil groove is formed between the oil suction pipe core and the oil suction pipe. A ball head sleeve is arranged in a pipe hole of the oil suction pipe core, one end of the supporting rod is connected with and supports the sling, and the other end of the supporting rod extends into the pipe hole of the oil suction pipe core from a pipe opening of the oil suction pipe core and is provided with a ball head matched with the ball head sleeve. The oil suction pipe core and the oil suction pipe directly have ultrahigh coaxiality, abnormal contact is avoided, connection is reliable after assembly, and noise and abrasion are effectively avoided. Meanwhile, on the basis of the scheme, the oil suction pipe core and the oil suction pipe can be designed to be longer, and the oil pumping capacity of the oil pump is greatly improved.

Description

Technical Field

[0001] The invention is used in the field of compressors, and in particular relates to an oil pump, a compressor and a refrigeration device. Background Art

[0002] Reciprocating piston compressors used for refrigerator refrigeration are usually driven by motors to realize the functions of suction, compression, and exhaust. The motor drives the crankshaft to rotate, and the centrifugal force generated by the crankshaft pushes the refrigeration oil to rise from the oil pool at the bottom of the lower shell, splashing and lubricating the friction pairs of the crankshaft, connecting rod, piston and other moving parts. The motor types are divided into fixed frequency and variable frequency. Variable frequency compressors can effectively improve the energy consumption level and noise and vibration performance of refrigerators. Variable frequency compressors reduce the power consumption of refrigerators and reduce the noise and vibration of compressor operation by running at low speed. However, too low operating speed causes the centrifugal force of the crankshaft to drop significantly, resulting in a decrease in the crankshaft oil pumping capacity, and the refrigeration oil cannot be lifted well, which eventually leads to the friction pairs of the moving parts not being well lubricated and failing. In order to solve the problem of weak oil pumping capacity of the variable frequency compressor at low speed, a viscous oil pump is usually installed at the tail of the crankshaft. The viscous oil pump usually includes an oil suction pipe and an oil suction pipe core. The oil suction pipe core is installed in the oil suction pipe through the bottom suspension structure. Poor installation of the oil suction tube core will cause poor coaxiality, resulting in severe friction between the oil suction tube core and the oil suction pipe, friction noise, and even wear and tear, leading to compressor failure. The oil suction tube core is suspended at the bottom, which is more likely to cause poor coaxiality between the oil suction tube core and the oil suction pipe. Because it swings unilaterally with the bottom fixed point as the reference, the automatic adjustment function is poor and the coaxiality performance cannot be corrected well. In order to reduce the impact of poor coaxiality, the existing oil suction tube core is designed to be shorter, and the matching clearance between the oil suction tube core and the oil suction pipe is designed to be larger. The shorter oil suction tube core and the larger matching clearance greatly reduce the oil pumping capacity and affect the lubrication effect of the friction pair of the compressor moving parts. Summary of the invention

[0003] The purpose of the present invention is to solve at least one of the technical problems existing in the prior art and to provide an oil pump, a compressor and a refrigeration device.

[0004] The technical solution adopted by the present invention to solve the technical problem is:

[0005] In the first aspect, an oil pump comprises an oil suction pipe, an oil suction pipe core, a strut and a sling, wherein the oil suction pipe core is inserted into the oil suction pipe, the oil suction pipe core is clearance-matched with the oil suction pipe, a spirally ascending oil groove is provided between the oil suction pipe core and the oil suction pipe, a ball head sleeve is provided in the pipe hole of the oil suction pipe core, one end of the strut is connected to and supported by the sling, the other end of the strut extends from the pipe mouth of the oil suction pipe core into the pipe hole of the oil suction pipe core, and is provided with a ball head which cooperates with the ball head sleeve.

[0006] In combination with the first aspect, in certain implementations of the first aspect, the ball head sleeve includes a first ball head sleeve and a second ball head sleeve, the first ball head sleeve is provided with a hemispherical first concave cavity, the second ball head sleeve is provided with a hemispherical second concave cavity, the first ball head sleeve and the second ball head sleeve are connected, and a ball socket that cooperates with the ball head is defined by the first concave cavity and the second concave cavity, and the second ball head sleeve is provided with a strut hole at the bottom of the second concave cavity for the strut to pass through.

[0007] In combination with the first aspect and the above-mentioned implementations, in some implementations of the first aspect, the first ball head sleeve is provided with a through hole at the bottom of the first cavity.

[0008] In combination with the first aspect and the above-mentioned implementation methods, in certain implementation methods of the first aspect, the tube wall of the oil suction tube core is provided with a plurality of support blocks distributed along the circumferential direction, and grooves extending along the length direction of the oil suction tube core are provided between adjacent support blocks, and the grooves include fixed grooves, and the ball head sleeve is provided with fixed wings at positions corresponding to the fixed grooves, and the fixed wings are assembled at the bend of the rear end portion of the fixed groove, and the ball head sleeve is confined in the tube hole of the oil suction tube core.

[0009] In combination with the first aspect and the above-mentioned implementation methods, in certain implementation methods of the first aspect, the groove includes an oil delivery groove, the tube wall of the oil suction tube core is provided with an oil seepage hole connecting the oil delivery groove and the oil groove, the ball head sleeve is provided with an oil core mounting platform, the oil core mounting platform is assembled on the oil delivery groove, the oil core mounting platform is provided with an oil core mounting hole, the oil core mounting hole is provided with an oil core, and the oil core is arranged between the oil seepage hole and the ball head.

[0010] In combination with the first aspect and the above-mentioned implementations, in some implementations of the first aspect, the support block is disposed at a middle position of the oil absorption pipe core along the length direction.

[0011] In combination with the first aspect and the above-mentioned implementations, in some implementations of the first aspect, the support rod is provided with a support ring at an end away from the ball head, the support ring is provided with a support hole, the sling passes through the support hole, and the support ring is mounted on and supported by the sling.

[0012] In combination with the first aspect and the above-mentioned implementations, in some implementations of the first aspect, the sling includes a suspension spring, and the outer wall surface of the oil suction pipe core is provided with a spirally extending spiral arm, and the spiral arm forms the oil groove between the oil suction pipe core and the oil suction pipe.

[0013] In a second aspect, a compressor comprises the oil pump described in any implementation of the first aspect.

[0014] In a third aspect, a refrigeration device comprises the compressor described in any implementation of the second aspect.

[0015] One of the above technical solutions has at least one of the following advantages or beneficial effects: In the technical solution of the present invention, the ball head sleeve is arranged in the tube hole of the oil suction pipe core, the ball head of the support rod is installed in the ball head sleeve, the support rod supports the oil suction pipe core in the oil suction pipe, and the support rod is connected and supported by the sling, which can be suspended on the frame of the motor stator when in use. The support rod cooperates with the ball head and the ball head sleeve to form a universal joint mechanism, so that the oil suction pipe core obtains a great degree of swinging freedom, effectively solves the coaxiality problem between the oil suction pipe core and the oil suction pipe, and avoids the contact between the oil suction pipe core and the oil suction pipe, which causes friction noise and wear. The present invention allows the oil suction pipe core and the oil suction pipe to directly have ultra-high coaxiality, no abnormal contact will occur, and the connection is reliable after assembly, effectively avoiding noise and wear. At the same time, based on the solution of the present invention, both the oil suction pipe core and the oil suction pipe can be designed to be longer, greatly improving the oil pumping capacity of the oil pump.

[0016] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0018] Figure 1 It is a schematic diagram of an embodiment of the oil pump of the present invention installed on a crankshaft structure;

[0019] Figure 2 1. It is a schematic diagram of the structure of an oil suction pipe core of an embodiment of an oil pump of the present invention;

[0020] Figure 3 yes Figure 2 Middle A-direction view;

[0021] Figure 4 yes Figure 3 Cross-section at BB;

[0022] Figure 5 1 is a schematic diagram of a support rod structure of an embodiment of an oil pump of the present invention;

[0023] Figure 6 It is a schematic diagram of the structure of the second ball head cover of an embodiment of the oil pump of the present invention;

[0024] Figure 7 This is a schematic diagram of the structure of a first ball head cover of an embodiment of an oil pump of the present invention;

[0025] Figure 8 It is a schematic cross-sectional structure diagram of a support rod, a ball head sleeve and an oil core of an embodiment of an oil pump of the present invention;

[0026] Fig. 9It is a schematic diagram of the matching structure of the oil core and the oil seepage hole of an embodiment of the oil pump of the present invention;

[0027] Fig.10 It is a schematic diagram of the matching structure of the fixed wing and the support block of an embodiment of the oil pump of the present invention;

[0028] Fig.11 It is a schematic diagram of the structure of an embodiment of an oil pump of the present invention installed on a compressor. DETAILED DESCRIPTION

[0029] This section will describe in detail the specific embodiments of the present invention. The preferred embodiments of the present invention are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present invention, but it cannot be understood as a limitation on the scope of protection of the present invention.

[0030] In the present invention, if directions (up, down, left, right, front and back) are described, it is only for the convenience of describing the technical solution of the present invention, and does not indicate or imply that the technical features referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, it cannot be understood as a limitation of the present invention.

[0031] In the present invention, "several" means one or more, "multiple" means more than two, "greater than", "less than", "exceed" and the like are understood to exclude the number itself; "above", "below", "within" and the like are understood to include the number itself. In the description of the present invention, if there is a description of "first" or "second", it is only used for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0032] In the present invention, unless otherwise clearly defined, the words "set", "install", "connect" and the like should be understood in a broad sense, for example, they can be directly connected or indirectly connected through an intermediate medium; they can be fixedly connected or detachably connected or integrally formed; they can be mechanically connected or electrically connected or able to communicate with each other; they can be the internal connection of two elements or the interaction relationship between two elements. Those skilled in the art can reasonably determine the specific meanings of the above words in the present invention in combination with the specific content of the technical solution.

[0033] An embodiment of the present invention provides an oil pump, which can be installed at the lower end of the crankshaft 600 when in use. During operation, the motor drives the crankshaft to rotate, and the centrifugal force generated by the crankshaft pushes the refrigeration oil to be lifted from the oil pool at the bottom of the lower shell through the oil pump, splashing and lubricating the friction pairs of the crankshaft, connecting rod, piston and other moving parts.

[0034] See also Figure 1 , Figure 5 , Figure 9-11 The oil pump includes an oil suction pipe 100, an oil suction pipe core 200, a support rod 300 and a sling 400. The oil suction pipe core 200 is a hollow thin-walled part, which can be made of materials such as polybutylene terephthalate (PBT). The oil suction pipe core 200 is inserted into the oil suction pipe 100. The oil suction pipe core 200 and the oil suction pipe 100 are clearance-matched. A spirally rising oil groove is provided between the oil suction pipe core 200 and the oil suction pipe 100, which is used to drive the refrigeration oil to rise upward during operation. The oil suction pipe core 20 0 is provided with a ball head cover 500, one end of the support rod 300 is connected and supported by the sling 400, and the other end of the support rod 300 extends from the pipe opening of the oil suction pipe core 200 into the pipe hole of the oil suction pipe core 200, and is provided with a ball head 301 that cooperates with the ball head cover 500. The ball head 301 of the support rod 300 cooperates with the ball head cover 500 of the oil suction pipe core 200 to form a universal joint mechanism, so that the oil suction pipe core 200 can freely adjust its position in the oil suction pipe 100 to ensure good coaxiality. The oil suction pipe core 200 can be supported on the sling 400 by the support rod 300, and the oil suction pipe core 200 components are slightly displaced during operation, which is conducive to further improving the coaxiality between the oil suction pipe core 200 and the oil suction pipe 100.

[0035] Combination Figure 1 , Figure 9-11 In the technical solution of the present invention, the ball head cover 500 is arranged in the tube hole of the oil suction pipe core 200, the ball head 301 of the support rod 300 is installed in the ball head cover 500, the support rod 300 supports the oil suction pipe core 200 in the oil suction pipe 100, and the support rod 300 is connected and supported by the sling 400, and the sling 400 can be suspended on the frame of the motor stator when in use. The support rod 300 cooperates with the ball head cover 500 through the ball head 301 to form a universal joint mechanism, so that the oil suction pipe core 200 obtains a great degree of swing freedom, effectively solves the coaxiality problem of the oil suction pipe core 200 and the oil suction pipe 100, and avoids the contact between the oil suction pipe core 200 and the oil suction pipe 100 and causes friction noise and wear. The present invention allows the oil suction pipe core 200 and the oil suction pipe 100 to directly have ultra-high coaxiality, no abnormal contact will occur, and the connection is reliable after assembly, effectively avoiding noise and wear. At the same time, the oil suction pipe core 200 and the oil suction pipe 100 can be designed to be longer, thereby greatly improving the oil pumping capacity of the oil pump.

[0036] In some embodiments, see Figure 5 The support rod 300 is made of stainless steel or other metals. The ball head 301 is assembled in the ball head cover 500 to form a universal joint mechanism, so that the oil suction pipe core 200 can freely adjust the position in the oil suction pipe 100 to ensure good coaxiality.

[0037] In some embodiments, see Figure 5-Figure 8The ball head cover 500 includes a first ball head cover 501 and a second ball head cover 502. The first ball head cover 501 and the second ball head cover 502 can be made of stainless steel or other metals. The first ball head cover 501 is provided with a hemispherical first concave cavity, and the second ball head cover 502 is provided with a hemispherical second concave cavity 504. The first ball head cover 501 and the second ball head cover 502 are connected, and a ball socket that matches the ball head 301 is defined by the first concave cavity and the second concave cavity 504. The second ball head cover 502 is provided with a strut hole 505 for the strut 300 to pass through at the bottom of the second concave cavity 504. The strut hole 505 has a larger inner diameter for assembling the strut 300 and allowing the strut 300 to swing freely to a greater extent. After the first ball head cover 501 and the second ball head cover 502 are assembled with the strut 300, the first ball head cover 501 and the second ball head cover 502 are bonded with oil-proof glue to form a whole, or they can be brazed.

[0038] Further, see Figure 7 , Fig.10 The first ball head cover 501 is provided with a through hole 506 at the bottom of the first cavity. The through hole 506 has a smaller inner diameter than the support rod hole 505, and is used to discharge gas and foreign matter to avoid blockage, and can also guide the refrigeration oil into the interior to form better lubrication.

[0039] In some embodiments, see Figure 3 , Figure 4 The wall of the oil suction pipe core 200 is provided with a plurality of support blocks 201 distributed along the circumferential direction, and grooves extending along the length direction of the oil suction pipe core 200 are provided between adjacent support blocks 201, wherein the grooves include fixed grooves 202, and the ball head cover 500 is provided with fixed wings 507 at positions corresponding to the fixed grooves 202, for example, see Figure 7 The first ball head cover 501 is provided with a fixing wing 507 on its outer side. The fixing wing 507 has a relatively long length and is used for bending and fixing after assembly. Figure 6 The second ball head cover 502 corresponds to the first ball head cover 501. A fixing wing 507 is provided on the outer side of the second ball head cover 502. The fixing wing 507 has a relatively long length and is used for bending and fixing after assembly. Fig.10 The fixing wing 507 is assembled at the bent rear end of the fixing groove 202 and limits the ball head cover 500 in the tube hole of the oil suction tube core 200.

[0040] Further, in some embodiments, see Figure 3 , Figure 4 , Fig. 9, the groove includes an oil delivery groove 203. In other words, in this embodiment, at least two kinds of grooves are formed by the support block 201. The oil delivery groove 203 is wider than the fixed groove 202 and is used as an oil guide channel. The wall of the oil suction pipe core 200 is provided with an oil seepage hole 204 connecting the oil delivery groove 203 and the oil groove. The ball head sleeve 500 is provided with an oil core mounting platform 508. The oil core mounting platform 508 is assembled on the oil delivery groove 203. The oil core mounting platform 508 is provided with an oil core mounting hole 509. The oil core mounting hole 509 is provided with an oil core 510. The oil core 510 is arranged between the oil seepage hole 204 and the ball head 301. The oil core 510 is made of porous medium or fiber material, has a good capillary effect, and plays a role in transferring refrigeration oil. The refrigeration oil comes in from the oil seepage hole 204 of the oil suction pipe core 200, passes through the oil core 510, enters the interior of the ball sleeve, infiltrates the balls, plays a good lubricating role, and ensures that the oil suction pipe core 200 can swing freely and adjust the position.

[0041] The inner diameter of the oil seepage hole 204 can be set to φ0.1-1.5 mm. The oil seepage hole 204 with a very small inner diameter will produce a capillary effect, and the refrigeration oil is introduced into the inside through the oil seepage hole 204 .

[0042] In some embodiments, see Figure 1 , Figure 4 The support block 201 is arranged in the middle of the oil suction pipe core 200 along the length direction. Because the ball head cover 500 is located in the middle of the oil suction pipe core 200, the oil suction pipe core 200 swings on both sides around the ball head 301 as the center, and the position adjustment is more sensitive, and the oil suction pipe core 200 is allowed to be made longer. After assembly, the upper end of the oil suction pipe core 200 can directly reach the oil outlet hole of the crankshaft, and the lifting effect of the refrigeration oil is better.

[0043] In some embodiments, see Figure 1 , Figure 5 The support rod 300 is provided with a support ring 302 at one end away from the ball head 301 . The support ring 302 is provided with a support hole 303 . The sling 400 passes through the support hole 303 . The support ring 302 is mounted on and supported by the sling 400 .

[0044] The assembly process of some embodiments of the present invention is as follows: Step 1, the support rod 300 is inserted into the lower ball head cover 500, the first ball head cover 501 is assembled to the second ball head cover 502, the fixed wing 507 is aligned, the oil core 510 mounting platform 508 is aligned, and the oil-proof glue is used for bonding, or it can be brazed. Step 2, the ball head cover 500 is installed in the oil suction pipe core 200, placed in the support block 201, the fixed wing 507 is inserted into the fixed groove 202 of the support block 201, and the fixed wing 507 is bent and fixed to the upper and lower end surfaces of the support block 201. Step 3, the oil core 510 is installed in the oil core mounting hole 509 of the ball head cover 500, and the oil core 510 is aligned with the oil seepage hole 204 of the oil suction pipe core 200. Step 4, the sling 400 is inserted into the support hole 303 of the support rod 300. Step 5, the oil suction pipe 100 is installed in the crankshaft. Step 6, the oil suction pipe core 200 is installed in the oil suction pipe 100. Step 7: assemble the sling 400 onto the motor frame.

[0045] In some embodiments, the sling 400 includes a suspension spring, which can provide elastic support for the support pole 300 .

[0046] It is understandable that the sling 400 may also be made of steel wire or the like.

[0047] See also Figure 2 The outer wall of the oil suction pipe core 200 is provided with a spirally extending spiral arm 205, and the spiral arm 205 forms an oil groove between the oil suction pipe core 200 and the oil suction pipe 100. The spiral arm 205 cooperates with the oil suction pipe 100 to form a viscous oil pump to drive the refrigeration oil to rise upward.

[0048] An embodiment of the present invention further provides a compressor, comprising the oil pump in any one of the above embodiments.

[0049] An embodiment of the present invention further provides a refrigeration device, comprising the compressor in any one of the above embodiments.

[0050] In the description of this specification, the description with reference to the terms "example", "embodiment" or "some embodiments" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0051] Of course, the invention is not limited to the above-mentioned embodiments, and those skilled in the art may make equivalent modifications or substitutions without violating the spirit of the invention, and these equivalent modifications or substitutions are all included in the scope defined by the claims of this application.

Claims

1. An oil pump, characterized in that: It includes an oil suction pipe, an oil suction pipe core, a strut and a sling, the oil suction pipe core is inserted into the oil suction pipe, the oil suction pipe core and the oil suction pipe are clearance-matched, a spirally ascending oil groove is provided between the oil suction pipe core and the oil suction pipe, a ball head sleeve is provided in the pipe hole of the oil suction pipe core, one end of the strut is connected to and supported by the sling, the other end of the strut extends from the pipe mouth of the oil suction pipe core into the pipe hole of the oil suction pipe core, and is provided with a ball head that matches the ball head sleeve.

2. The oil pump according to claim 1, characterized in that: The ball head sleeve includes a first ball head sleeve and a second ball head sleeve, the first ball head sleeve is provided with a first hemispherical concave cavity, the second ball head sleeve is provided with a second hemispherical concave cavity, the first ball head sleeve and the second ball head sleeve are connected, and a ball socket that cooperates with the ball head is defined by the first and second concave cavities, and the second ball head sleeve is provided with a strut hole at the bottom of the second concave cavity for the strut to pass through.

3. The oil pump according to claim 2, characterized in that: The first ball head sleeve is provided with a through hole at the bottom of the first concave cavity.

4. The oil pump according to claim 1, characterized in that: The tube wall of the oil suction tube core is provided with a plurality of support blocks distributed along the circumferential direction, and grooves extending along the length direction of the oil suction tube core are provided between adjacent support blocks, and the grooves include fixed grooves, and the ball head sleeve is provided with fixed wings at positions corresponding to the fixed grooves, and the fixed wings are assembled at the bent rear end portion of the fixed grooves, and the ball head sleeve is confined in the tube hole of the oil suction tube core.

5. The oil pump according to claim 4, characterized in that: The groove includes an oil delivery groove, the tube wall of the oil suction tube core is provided with an oil seepage hole connecting the oil delivery groove and the oil groove, the ball head sleeve is provided with an oil core mounting platform, the oil core mounting platform is assembled on the oil delivery groove, the oil core mounting platform is provided with an oil core mounting hole, the oil core mounting hole is provided with an oil core, and the oil core is arranged between the oil seepage hole and the ball head.

6. The oil pump according to claim 4, characterized in that: The support block is arranged at the middle position of the oil absorption pipe core along the length direction.

7. The oil pump according to claim 1, characterized in that: The support rod is provided with a support ring at one end away from the ball head. The support ring is provided with a support hole. The sling passes through the support hole. The support ring is sleeved on and supported by the sling.

8. The oil pump according to claim 1, characterized in that The sling comprises a sling spring, and the outer wall surface of the oil suction pipe core is provided with a spiral arm extending spirally, and the spiral arm forms the oil groove between the oil suction pipe core and the oil suction pipe.

9. A compressor, characterized in that: The oil pump comprises the oil pump according to any one of claims 1 to 8.

10. A refrigeration device, characterized in that: Comprising the compressor as claimed in claim 9.

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